Post your job for free, get up to 3 quotes

Post your job for free. Read reviews, get quotes, and see tips on hiring the right person.

What type of tradesperson do you need?

What type of job is it?

Find a local house extension specialist in Welwyn, Hertfordshire

There are 1176 House Extension specialists in Welwyn, and last month we helped homeowners get quotes for their home improvement jobs.

Browse House Extension specialists in Welwyn, Hertfordshire

Take a look at our House Extension specialists profiles, read reviews and request quotes directly.

Please specify a location
Please specify a trade

We make any tipe of brickworks, lofts, extensions and fence!

Latest homeowner review

Reviewed by Dan on 19/6/2022

Helped me when another company let me down and left the job unfinished. I'm very grateful and will use again.

London Development uk ltd is our company, we have been trading for over 12 years in the construction business. - We are a fully insured company with a big portfolio of jobs completed and we are friendly and reliable on any work and business that is coming across. - We can do big jobs as new buildings or full refurbishments, basements, extensions, lofts conversions etc and also we can do small jobs as bathroom refurbishments or even smaller is always space and time for a new job. - We guarantee you that you will get the best workmanship on your job with best skills and acknowledge in the construction industry, time effective and costly effective for customers. Try our company and you will gain the benefits!!!

Latest homeowner review

Reviewed by Angela on 20/2/2021

Seriously so impressed by professionalism, work ethic, quality of work, expertise and advice when i was designing my bathroom. I really cant fault ANYTHING about Peter and his team. Very respectful with my home, they prepared the areas to limit the mess and then at the end of the job, they left the area clean and tidy. I would recommend this company to anyone, and i will definitely be using again - 5 STARS

CHRIS NWL CONSTRUCTION LTD is an professional refurbishment and construction contractor with many years of experience in construction industry. We are building company specializing in solutions for your Painting, Decorating, External Solid Home Insulations, House Refurbishments and Extensions. Providing free quotations with guaranteed customer satisfaction.

Latest homeowner review

Reviewed by Paul on 8/4/2022

Chose these guys for my house extension. Chris and his workforce are very organised with good planning skills and they’ve been making sure our needs have been met all along the way. Really recommend for any kind of building work.

Property Maintenance.

Latest homeowner review

Reviewed by linda on 29/6/2022

I am absolutely delighted with the work that Chris and his team have done .From a boring slabbed garden to an amazing contemporary garden (A special thanks for David Daniel and Valdez’s they went above and beyond any extra we wanted they were more than happy to do These lads are assist to Chris’s company The quality of the work was excellent and I would recommend them to others If I require anymore work to be done I will not hesitate to contact Chris again thank you so much Linda +Mick

This family run building company, prides itself in providing a one-stop-shop service catering for all your home improvement, extension and conversion needs.

Latest homeowner review

Reviewed by Andy on 20/6/2022

The survey missed out on almost EVERY thing we wanted, this was raised and I was promised an amended quote which never came through. A complete waste of my time

Rokcons is a dynamic and experienced team, committed to providing excellence in general building and constructions, lateral thinking and innovation solutions to our clients. We are proud of our attention to details and the top quality of our final product

Latest homeowner review

Reviewed by Sarah-Jayne on 7/6/2022

Ray and Bogdan were a pleasure to work with! They are a Family team that ensure professional and high standard work . Work done has been on schedule and any issues found have been sorted. Bespoke elements , the guys came up with some amazing ideas that made our home fantastic. The team have a multiskilled element to their work that helps with all parts of job. They allow a good post work time frame incase of any issues. Recommended for anyone thinking of house renovation and extension.

Our services are designed with you in mind. The positive relationships we uphold with contractors and clients alike throughout the building industry demonstrates our consistent high standards of workmanship – no matter the service we’re providing. Brickwork Specialist Kitchens and Bathrooms Plumbing Tiling – wall and floor Electrical work Extensions Garage Conversions Flat Conversions Walls New Builds Full Renovations Structural Alterations HMO Conversions around the UK Heritage approved craftsmen Commercial refurbishments We offer a full service. We handle the planning applications, structural engineers and co-ordinate with the building inspectors – all major components in delivering your dream project. Whatever you need, we’ve got it covered.

Latest homeowner review

Reviewed by Sven on 5/8/2022

Lee and Luke double act where Lee is admin and Luke is a builder. Luke Giles came to view a job. He was lovely and knowledgeable with the very competitive price as they had a few weeks gap they needed to fill due to some big job been cancelled. First couple of weeks went fine, and we were paying weekly. However, when they took money upfront to order materials/doors, suddenly they were not available and instead they came up with myriad of excuses. Now 2 months later no progress, still living on building site

Full property renovations, extensions, loft conversions outbuildings

Latest homeowner review

Reviewed by James on 6/8/2022

Pedro and his team came did my job in quick time cleaned up after them great job all done. Thanks Pedro and your team.

We are two Polish partners and friends, who have been working in the construction industry for over 20 years. Initially we started as sub-contractors, but clients started recommending us to other family members and friends and our direct work increased very quickly. Finally we decided to start our own company and M&P Dream house Constructions was born. Over the past years, we have worked on over 200 projects – anything from new builds to extensions and kitchen & bathrooms. We handle small and large projects with the same level of detail, professionalism and service. We know, that if our clients are happy then we will be referred and therefore a 100% client satisfaction is key to our business. Over 80% of our work is through referrals and we wish to keep it this way.

Latest homeowner review

Reviewed by Amit on 7/2/2022

Marek and Piotr (M&P Dream House) have just completed an extension project of my garden flat in London. This was a challenging project with complexities due to lack of side access, a big mature tree in the garden (deeper foundations) and shortage of building materials. M&P team overcame all the difficulties almost effortlessly! Everyone on their team had very good work ethic, polite and professional. I would highly recommend them to anyone.

Akoni is a building company who can provide you with peace of mind and satisfaction. Our primary aim is to make sure our clients are respected and listened too with what they want to achieve. Over 20 years experience previously known as Aquafix which was predominantly bathrooms and heating systems. We branched out into our own developments and renovations. We now cover all trades and can supply you with the best results. All trades are fully qualified with years and years of experience. We aim to work closely with our clients from start to finish and use some great designers, architects, and structural engineers to help the process easy and take the stress away from you.

Latest homeowner review

Reviewed by Tiffany on 14/5/2022

Dan was really helpful. He accommodated us straight away and when we called in a panic once we’d realised there were more things we needed his help with, he came the next day. His team all worked hard and took care to get the job done to a high standard. We will definitely be using them for any future work.

Hello, my name is Ronnie and I am builder, born and bred in London, I started off nearly 30 years ago working with my dad, and have now taken over the business with my son, I am fully committed & driven to provide outstanding quality at a fair price. I am a fully qualified plasterer by trade, however over the years my skills have grown and grown in other trades also, giving me the opportunity to take on bigger work i.e. extensions, landscaping and full property refurbishments, to include from design to fit kitchen and bathrooms, however there is no job to small and welcome all types of plastering and building work. all my work is fully insured and I pride myself on being extremely polite, very clean and tidy and unbelievably punctual and reliable. many thanks for taking the time to read my profile and viewing my previous work pictures

Latest homeowner review

Reviewed by Robin on 14/7/2022

Ronnie did an excellent job replacing our large deck area. Always responsive, always turned up when he said he would, and competitively priced. Kept in touch at every stage of the work and did a neat and tidy job.

KM Building Specialists is dynamically developing company created by people with passion. Our mission is professional advice, meeting expectations and, as a result, obtaining satisfaction of all our clients. Km Building Specialists was founded in 2009 in response to local market demand. As a team, we feel responsible for the effects of our work and customer satisfaction. We take care of the quality of our products and the timely delivery of orders. We offer our clients a full range of services including professional technical advice, free measurements, company assembly, transport, warranty etc. We work closely with various construction specialists (electricians, gas-safety experts, architects, garden designers) to enable us to deliver the top class service and to ensure that the safety building regulations and codes of practice are followed. We are CIS registered and hold comprehensive insurance. Most importantly, our builders are friendly, reliable and highly experienced. We can also source high quality and good value building materials from Europe, we specialize with windows. An individual approach to each client makes your home more attractive, safer and more comfortable. Out professional and highly qualified team is able to meet any challenge from consultancy at the design stage, through measurements, to a beautiful finish. WE DO WHAT WE REALLY LIKE… We invite you to familiarize yourself with our offer and to order a free visit to your property from our specialist to discuss your needs and offer a free consultation based on your requirements and our years of experience.

Latest homeowner review

Reviewed by Jake on 23/5/2022

Really happy with the end result it looks better than what we had ever imagined it would be. Marek was on hand to help us throughout the build offering suggestions outside of what our architect had planned and in fact the ideas were better for us as he really understood what we wanted to achieve but also the changes suggested helped our property value. We also utilised the array of contacts for our work tops, doors and windows which again look great and we had a positive experience with all the third party

I m looking forward to work good make everyone happy I am qualified I did do 130 flats in luton so I m waiting for any once jobe contact me because u will be happy with the service many thanks Gentian??

Latest homeowner review

Reviewed by Mark on 30/6/2022

Good communication and professional. Worked hard and put the hours in. Will use again, recommended.

MID BUILDING team based in North London of honest, punctual, qualified professionals, providing a full range of building services. We are offer affordable, reliable, hassle free building services for all our customers & customers satisfaction guaranteed

Latest homeowner review

Reviewed by John on 6/6/2022

Emil is very personable, honest and reliable. He visits site on a daily basis to direct his workforce. The whole team is very friendly and accommodating. They have expertise in all areas of the building trade from foundations to the finished product. The quality of their workmanship is excellent. Workforce very punctual and clean up on a daily basis. Prepared to work long hours as required. Pay great attention to detail. A five star job finished on time and to budget. Would recommend to anyone.

We are a St Albans based, with 25 years experience. We specialize in extensions, refurbishments and all types of building work. Our team are City and Guilds trained, Gas Safe and electrically certified. Our aim is to deliver high quality work.

Latest homeowner review

Reviewed by Patrick on 20/6/2019

Good job thanks

Adam & Darren always work to acheive the highest standards acheivable ,handyman ,painting, carpentry ,fence erecting to landscaping to re pointing also damp works penetrative or rising ,no job to big or small for AB contracts we never dissappoint, pls look at ratings and comments to back this up ,look forward to hopefully working for you all the best Adam b & Darren c AB contracts & Rated people

Latest homeowner review

Reviewed by Yousuf on 22/1/2022

Superfast!! Darren and his colleague was so quick! Got the job done in 11mins! Excellent!! Highly recommended would definitely hire again! Thanks so much! 5/5!

With more than 18 years of experience, MP Building Improvements delivers an outstanding customer service, excellent workmanship, quick turnarounds, and competitive prices with efficiency and pride.

Latest homeowner review

Reviewed by Joseph on 7/10/2019

I would not recommended to anyone due bad workmanship

Baldock build

Latest homeowner review

Reviewed by James on 6/10/2016

Good job. Thanks very much Glenn.

We are a local building company in Stevenage. We specialise in garage conversions,Extensions, Porches, Conservatories and Windows and doors.We are new to this site but can supply lots of local recommendations.Written quotes free and no heavy sales pitch.

Latest homeowner review

Reviewed by Katy on 28/3/2014

Had windows and back door replaced today in the lean to. They look great and they were very professional. Will be using them again to have the roof done and will use again in the future. Thanks for a great job

An experienced, reliable and versatile tradesman specialising in plastering, general building and property maintenance.

Latest homeowner review

Reviewed by John on 8/10/2013

John is a great bloke. Very professional, punctual, tidy and skilled. He has done a great ceiling repair job for me and I'll certainly be using him again for other jobs. Highly recommended.

Latest homeowner review

Reviewed by ANDREA on 30/3/2014

Andrew was polite and courteous! He was also a very good worker and I was impressed by his knowledge. Thank you Andrew, I hope you will help me out again in the future!

We have over 15 years experience in building and construction. We have highly skilled professional team that can carry out nearly any type of construction work at competitive rates. Customer service and high quality finish is very important to us.

Latest homeowner review

Reviewed by Mansoor on 18/6/2013

fantastic service and good price..would recommend. very honest.

Latest homeowner review

Reviewed by Alf on 4/11/2016

Fast, professional job was undertaken for a reasonable price. We are very happy with the end result, and wouldn't hesitate to recommend Terry's services.

we are experience refurbishment contractors. we are reputable and reliable builders, established since 2010 and over 20years experience in building trade. using our skill and materials, we are eager to ensure that our customers are completely satisfied.

Latest homeowner review

Reviewed by mario on 21/2/2019

Great job, punctual and good communication. Thanks

Latest homeowner review

Reviewed by Angie on 6/7/2011

We called out Ambient Solutions and received a quotation for the job within the 24 hours promised – no charge for the call out or the quotation. The work was started and completed on time. I would highly recommend Ambient Solutions for any plumbing job. Thanks Ambient! Angie at Zest ST Ltd

Latest homeowner review

Reviewed by andrew on 3/4/2012

Very reliable, honest, skilled and reasonably priced. I would highly recomend him

My experience extends 15 years in stone restoration and I'am extremely proud of my work. re-pointing, exterior stone restoration and fixing, plaster and Venetian plaster work, tilling, rendering,city & guilds level 2 carpentry qualification.

Latest homeowner review

Reviewed by Catherine on 3/1/2014

Excellent service, very friendly, willing to do whatever it takes to do the job. Highly recommended.

We are a construction company with 15 years experience on jobs from small renovations to new build houses and flats. (Specialize in brickwork)

Latest homeowner review

Reviewed by Mandeep on 5/6/2015

Good Job

We are a family run business specialising in the following: - Extensions - Loft Conversions - New Roofs - Roof Repairs - Fascias & Soffits Alltype Building Contractors UK Ltd are a leading building firm based in Kent with easy access to the South East of England and London. We pride ourselves in providing our customers with the highest level of workmanship, and in using only the best materials available. The company was established in 1985 and was incorporated in 2000. Over the last twenty years Alltype Building Contractors UK Ltd has grown steadily as a direct result of a rigorous commitment on client satisfaction. While the company has grown substantially, the maintenance of a ‘hands on’ policy by senior management in the day to day running of all projects ensure that this client satisfaction is maintained. Sound management principles, proactive construction methods, ongoing attention to detail and quality of workmanship are all key principles of workmanship and are all key principles of Alltype Building Contractors UK Ltd.

Latest homeowner review

Reviewed by Gavin on 22/3/2022

The roof repair and replacement of tiles following storm damage was completed quickly and in a professional manner.

GREAT GREG BUILDER!!! We offer: pointing, brickworks,, pavingstons laying, panting, decoratoring

Latest homeowner review

Reviewed by Ben on 17/10/2020

Greg built a front wall and laid paving in my front and back garden. He did a really good job, and it looks great. He was reliable, tidy, and really clear on things like costs and how the slabs would be laid so I knew exactly what I was getting. Would definitely recommend him to anyone wanting brickwork or paving/landscaping.

If you are looking for anything from a new extension to a renovation, or down to the smallest job, make sure you get in touch with the expects here at W Peat Development.

Latest homeowner review

Reviewed by Gillian on 6/12/2015

Wayne and his team did a great job, i am very pleased with my fitted wardrobes. They are stunning. i gave good for reliability only because Wayne is so busy it took a while to actually get the guys in to do the job, several months. i love them and they did a good job so worth the wait.

We are a small local company dedicated to brightening up people's homes with new double glazing and with our friendly team of fitters and unbeatable prices we are sure you won't be disappointed!

Latest homeowner review

Reviewed by Kevin on 1/11/2018

Reliable, fairly priced, and done quickly. Will call Albert again in the future.

Latest homeowner review

Reviewed by David on 23/4/2012

Do not be fooled by Stephen's laid back nature and quite approach, the structural building work we asked him to undertake was, once agreed, carried out to the letter, completed on time, to a very high standard and within budget. We would not hesitate using Stephen again for any building work.

I have worked in the construction industry for 30 years. I began as a carpenter then got involved in building extensions, loft conversions etc. For the last 18 years I have mainly concentrated on fitted kitchens both building site and private work.

Latest homeowner review

Reviewed by latoya on 21/8/2014

absolutely fantastic, professional, enthusiastic, reliable and a perfectionist resulting in a fantastic kitchen we ate over the moon with

A customer focused builder who provides a professional, reliable old fashioned service. FULLY INSURED & ALL WORK GUARANTEED. call & i will be happy for you to take a look at my work,

Latest homeowner review

Reviewed by Phil on 18/3/2020

Efficient service, reasonable price. Quality of work was very good.

My capabilities. 10 years experience in plumbing and tiling. With qualfications NVQ'S and CITY AND GUILDS. Also have multi trade skills. Roofing ' Groundworks and UPV Fascias and Soffits. Passed 3 HEALTH AND SAFTEY courses . Best of luck Aaron.

Latest homeowner review

Reviewed by CHAMP on 15/6/2021

Needed an outside water tap to the back garden, which had to be tapped of from the downstairs WC. Aaron did a very neat, tidy, professional job, no issues, no hassle, very friendly, polite, knowledgeable, totally happy with the job. Keep up good work Aaron ??

Latest homeowner review

Reviewed by Amy on 18/12/2012

I can highly recommend Rob and his team at Made Build Interiors. They have just finished work on our Bathroom, Kitchen, Living room and Dining room. They have completely transformed all of these rooms and we are extremely happy with the end result. Rob is a great sounding board for creative and structural ideas and has a good eye for detail and design. They kept all work areas clean and tidy and had a friendly but professional attitude. We will definitely use them again for future work.

Greetings we are the soul of WELLSELEC, the last 12 years we have been installing designing and running jobs to the satisfaction of my clients on this basis 'people don't care how much you know until they know how much you care'

Latest homeowner review

Reviewed by Stephen on 6/7/2015

Very pleased with all the work done, good communication and the end result was exactly what I wanted to achieve. I would use Matt again, very honest, works hard and has a good attitude towards your project. Big thanks again.

I have been in rhe building trade for over 45 years as carpenter/joiner, foreman carpenter and site manager until i branch out in building extensions/ loft and garage conversions, refurbs ect. Since 1986.

Latest homeowner review

Reviewed by Moise on 6/12/2021

Robert and his team were excellent. Work done to a great standard

The Company offers a complete home and garden service to both the domestic and commercial customer. Our services range from Painting and Decorating to Plastering and garden maintenance and design. We are a competitive, friendly and reliable service

Latest homeowner review

Reviewed by PHILIP on 11/11/2018

Terry,+++++++++++ supported by Lance St John attended daily and worked to a pre arranged schedule. Their approach was professional, they were courteous, reliable timekeepers, the work place was kept tidy, their attention to detail was exemplorary, the quality of finish superb. Terry managed the procurement of supplies and the attendance of skilled tradesman i.e. bricklayers, electrician, plumber as required without any undue delays. We would have no hesitation in recommending him, We will use him again!

15 years experience. General building work. Plastering, rendering, screeding, tiling.

Latest homeowner review

Reviewed by Lyn on 19/6/2021

Really helpful, good communication as we tried to solve the issue etc. Very pleased.

Professional plastering services provider. Wide range of experience, will cover all customers needs: restore water damage to interior and exterior, plaster damage, plumbing or electrical alterations, re-skimming or skimming of new house.

Latest homeowner review

Reviewed by john on 18/3/2019

Excellent!! Very polite, efficient, trustworthy. Turned up on time and carried out works to a good standard. Highly recommended!

Latest homeowner review

Reviewed by Ian on 23/7/2013

Gary built a double skin brick garden wall with substantial piers and a cavity for planting, as well as built in storage for bins. He was prompt, unbelievably hard working and generally a great bloke to deal with. We could be more happy with the job and certainly intend to ask him to do more work for us again when our renovation project is at the right point. Couldn't be more highly recommended.

Latest homeowner review

Reviewed by Ian on 26/9/2008

I'd highly recommend John. He managed our expectations well from the start - turned up on time to quote, delivered a quote the next day as promised, provided references when we asked for them (who backed up that he's a good builder), found a space in his schedule quickly to fit our job in, did it quickly, efficiently and leaving no mess afterwards. And charged us a reasonable amount for the work. Couldn't speak more highly of him, and will definitely ask him to quote on our extension when we progress with the planning.

We are a small company based in Stanstead Abbotts. Our work is always to a very high standard. We use the best quality materials and a team of fully qualified tradesmen. We work closely with our clients to give them exactly what they want.

Latest homeowner review

Reviewed by Heather on 25/7/2012

I posted the job on Thurs, Mick and Pete came round on Sat morning and the job was done by Tues. Really professional and friendly guys who explained everything to me really clearly. I cannot recommend them highly enough.

The Angel of your Garden started after joining R.P. and undertaking Garden Clereance as a start, than moving on maintaining the gardens and eventualy into Landscaping and Design. Our team consists in polite, enthusiastic, and hardworking tradesmen.

Latest homeowner review

Reviewed by Aqsa on 21/6/2017

Done a amazing job. Thank you so much Stefan! Definitely recommend.. :)

Bathrooms are not always luxurious, but they can be. When you work with Topcoat, we will show you how new hardware can be added and how showers and sinks can be upgraded to improve the look. It’s even possible to add more space to an existing bathroom

Latest homeowner review

Reviewed by Rui on 28/3/2018

Wojtek worked hard and finished my bathroom tiling and room painting in high standard. I would recommend him and use his service again.

my name is eddie duffy, , im an irish man with almost 20 years experance in carpentry and building, i under take al aspects of building from refurb to new build, i have a proven track record & a great eye for detail. I enjoy making life better for people and the small jobs give me great pleasure to do.

Latest homeowner review

Reviewed by Hazel on 12/8/2015

Reliable,friendly and did a fantastic job,would certainly use again.

Latest homeowner review

Reviewed by Steve on 30/1/2015

Can't fault David's work and attitude. He's top chap and was great value. We're very pleased with the finished job.

Aztec

House Extension in Welwyn

We are a family run business, with over 30 years experience, with domestic and commercial decorating contractors. From high class wallpapering to external decorating including coving and Corniche specialists.

Latest homeowner review

Reviewed by Gail on 3/8/2015

A great job painting exterior of wood clad house. House now looks great. Thanks to Bobby and the guys. Would Highly Recommend. Gail and Barry

How our service works

  • Create a job - it's free

    We'll connect you with the right tradesperson, from over 30 different trades.

  • Get quotes

    Up to 3 tradespeople can provide a quote, but on average you'll get 1-2.

  • Check ratings

    Look at each tradesperson's profile page to see their ratings and reviews.

  • Pick a tradesperson

    Use our homeowner checklist for extra tips on choosing a tradesperson.

  • Job done

    Leave a rating for your tradesperson based on quality, reliability and value.


Recently completed jobs

Here's what's been happening in and around your area

Size of extension: 2 rooms...

Size of extension: 2 rooms Height of extension: 1 floor Room(s) to be in the extension: dining room, kitchen Hi, Looking for a company who can do...

Double Storey extension about...

Double Storey extension about 3 x 8 meter

We have an existing small...

We have an existing small house side extension and would like to extend this at the back so we can have another bedroom with toilet and bath. We have...

Double height extension to...

Double height extension to rear extending upstairs bedroom and downstairs kitchen diner Conservatory removed to accommodate this Single storey porch...

Roughly 5 by 5 extension to...

Roughly 5 by 5 extension to increase size of kitchen and living room

Size of extension: 2 rooms...

Size of extension: 2 rooms Height of extension: 1 floor Room(s) to be in the extension: bathroom, bedroom(s) Need to get quote for first floor...

Extension to living room...

Extension to living room dinning area onto patio of garden

Extend kitchen and dining room...

Extend kitchen and dining room

House extension / conversion

I've a 3 bedroom semi detached house tho I'm looking to extend into the loft for a 4th bedroom plus ensuite. Also a 3 metre kitchen extension at rear...

First story extension

First story extension, minus the electrical and plumb/heating work Size of house extension: 2 Room(s) to be in the extension: Bedroom(s),...

How our service works

  1. Create a job - it's free

    We'll connect you with the right tradespeople, from over 30 different trades.

  2. Get quotes

    Up to 3 tradespeople can provide a quote, but on average you'll get 1-2.

  3. Check ratings

    Look at each tradesperson's profile to see their ratings and reviews.

  4. Pick a tradesperson

    Use our homeowner checklist for extra tips on choosing a tradesperson.

  5. Job done

    Leave a rating for your tradesperson based on quality, reliablity and value.

app-icon

Get our app for homeowners

  • Send messages and get notifications from tradespeople
  • Add photos to get more accurate quotes
  • View tradespeople’s profiles