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Craig got in touch quickly, gave me a rough estimate over the phone and answered all my questions. Surveyor arrived on time, gave instant quote. Price was good. Michael and (another) Craig turned up to do the job on the day, time given. Good, tidy job. Can't fault anything, from start to finish!! Would recommend!
Mary
George and his team are experienced builders, replaced my front door with a custom frame/sidelights and raising the floor level in the hallway quite quickly - in fact, they were the only who came next day, gave a quote straightaway and were ready to start in just couple of days. They also had all the necessary tools and materials, were ready to buy something additional quickly on the day - if further adjustments were required to fit everything as I asked. Thanks a lot for your help, guys!
Dmitry
Highly recommend. These guys did a fantastic job of constructing our pergola and decking. Very hardworking and reliable. The job was completed in the time frame agreed and to a very high standard. We would 100% use them again.
Holly
Find everything you need to know about hiring a local cellar conversion specialist. Extend or renovate an existing basement, or excavate a new one from scratch. Below, we cover tips to help you find a basement conversion specialist:
Browse Cellar & Basement Conversion specialists
Take a look at our Cellar & Basement Conversion specialists profiles, read reviews and request quotes directly.
How to find a reliable, local basement conversion specialist
A basement conversion has the potential to add a lot of value and space to your home. Once your team excavate your new basement, you can turn it into a bedroom with an ensuite bathroom, a new gym, a living room, or any other living space.
Transform your underground spaces into useable rooms with the help of a skilled cellar conversion specialist in your local area.
What does a cellar conversion involve?
If you already have a basement, then you might be looking to turn it into a liveable space by adding structural supports, damp-proofing, insulation, heating, and a new ventilation system. If your cellar was intended for storage and has low ceilings, your basement conversion team might have to dig down to increase the head height before they can add things like new plumbing and electrics.
Or, you might be thinking about extending your current basement, such as by digging underneath your garden. This is another great way to add more space and additional rooms to an existing basement.
If you don’t currently have a basement, you can also create a new one by carrying out excavation work. As well as the basement, you’ll also need a new staircase.
Whether you want to build a cellar from scratch or want to turn your cramped storage room into a brand new living space, a basement conversion specialist can help.

Factors to consider before hiring a basement conversion specialist
On average, a basement conversion can take anywhere from 12 to 20 weeks to complete. Avoid stress and costly repairs down the line by hiring a skilled specialist to help you upgrade your home. Look out for basement conversion installers that:
- Are a skilled company with a strong history of high standard projects
- Have all the licenses and insurance needed to protect you and their workers
- Have a good range of positive reviews from previous customers vouching for their reliability
- Are available to carry out the work in the timeframe you need it by
- Are quoting a price and payment option that you are happy with, having compared the quote with other basement conversion companies
A local basement conversion specialist is more likely to respond quickly as they’ll be right around the corner and ready to help.
How much does a basement conversion cost?
If you don’t have space for a rear or side extension, and don’t have a loft to convert, then a basement conversion is a great option to maximise your home’s space. How much you’ll end up spending on your basement conversion depends on a range of factors, including:
- The size and layout of your basement
- How many structural changes will be needed, including extra support beams and underpinning
- Waterproofing and damp proofing costs, as well as the installation of effective drainage systems
- Whether you want a window well installed, which can help you introduce light into your basement
- Basement insulation and soundproofing
- Labour costs, which are affected by where you live in the UK
The average basement conversion costs between £120,000 and £160,000. For a more accurate quote for your specific project, speak to a basement conversion specialist today.
Do I need planning permission for a cellar conversion?
You won’t need to apply for permission for a cellar conversion, as long as:
- You’re converting an existing residential basement into a living space
- How you’re using it isn’t significantly different and the basement isn’t a separate unit
- You don’t alter the external appearance of the property, such as by adding a light well
- You don’t live in a listed building
Excavating a brand new basement which involves major works is likely to require planning approval.
For more information, contact your local planning authority or visit the Planning Portal website. You can also read our planning permission guide for more information.

Questions to ask before you hire a basement conversion specialist
Whether you’re looking to build a brand new basement or simply want to extend or improve your existing cellar, there are a few questions you should ask before you hire a specialist to excavate your new room:
Do you have public liability insurance and what does this cover?
While it’s not a requirement for them to have it, it’s a good idea for your basement conversion specialists to have public liability insurance to cover you and them against any accidental damage done to your home or personal injuries. Make sure to always ask your tradespeople what insurance they have before you hire them. This will guarantee protection for both parties.
How many years of experience do you have?
Knowing how many years of experience your basement conversion specialist has will allow you to pick a tradesperson who you are confident has enough experience to carry out a high quality job. When you’re finding a tradesperson through Rated People, head over to their profile to check out the pictures on their work gallery and their ratings and reviews.
Do you use subcontractors? If so, are they licensed and insured?
Your basement conversion specialist is likely to employ subcontractors. It’s a good idea to confirm the qualifications and insurance coverage of everyone who will be working on your project, including surveyors, structural engineers and electricians. Anyone working with gas needs to be registered with Gas Safe, and anyone installing electrics (in England and Wales) needs to be Part P certified to be able to self-certify their work. These tradespeople will have valid documentation that you can ask to check.
What is your estimated timeline for completing the project?
Knowing what the estimated timeline for completing the project is will help you set realistic expectations about how long your basement renovation will take to complete.
How much will the job cost?
Asking how much the job will cost will help you budget for your project and will ensure price transparency before you hire. How much you’ll end up spending depends on the scope of your project, and where you live in the UK, so make sure you add plenty of details when you post a job.
Hi, I am Stefan, and I have three decades of experience as joiner, specialising in wood flooring and tiling, doors, wardrobes, decking, bathroom fitting and refurbishment.
CAN Construction ! ALL aspects of R.S.J. Work. Fabrication.Alterations,Steel and lintels. Knock through specialists. . FULLY INSURED. We won't let you down.
At O.B.Build we want to make your home look amazing inside or outside.We take pride in our work and can handle any job or task.We are clean tidy, polite and always deliver a quality finish.
Brilliant refurb of 2 bedroom flat, timelines were tight but John delivered to great standards on time! Job included damp control, relaying floors, and painting/redecorating. Would highly recommend. Thank you John!
No job is too small By choosing our company you choose professional service and fast realization time. We are local Edinburgh based with over 10 years of experience. We love what we do and we are proud of providing excellent service. Our clients are number 1 in customer satisfaction. We always ensure high quality finish which meets your requirements.
I hired Dream Renovations (Patryk) to fit vinyl plank flooring in my shower room. Great job: quick and tidy. Following that I hired him to repair a collapsed ceiling. He turned up when he said he would, and did a great job: plasterboard, plastered, and painted. If I need any work carried out in the future, Patryk will be the first person I will contact, and I am happy to recommend him to anyone who needs work done in their home.
Hollywood joinery is a friendly company that specialises in cabinets an fitted wardrobes an all other joinery have been in the building trade for over twenty years an have experience in many other aspects of the building trade
Perfect job. Quickly done, great communications, reasonable price. Highly recommend.
www.cgtbuild.com We are c g t building services We are a highly skilled, family run business with over 30 years experience in the building and landscaping sector. We pride ourselves in giving 100% customer satisfaction and can guarantee competitive prices against leading organisations, and have a solid team of dedicated and experienced tradesmen, producing quality, skilled craftsmanship, and delivering projects both on time and to budget. Our combined skills mean we can offer a full range of building services from fencing and decking, to extensions and refurbs. as well as having a fully licenced fleet of waste removal vans, offering a fast, and reliable waste clearance service at very competetive prices. so whether youre looking to extend, restore, or refurb, or are in need of a new kitchen fitted, or youre looking to clear out your garage or landscape your garden. Theres only the one team you need. The C G Team
The team did a great job helping us get new kitchen doors, panels and plinths in. They also helped to get us ready for our new worktops to be measured up and our applicances reinstalled once the new worktop was fitted. They were really helpful and worked around the changing delivery dates from our suppliers
KL joinery services offering all types of joinery work
We were looking to change 7 internal doors and Kieran was first to reply , he came to see then he sent us the price for doors to buy and deliver and fully installed , when we accepted he came out on time and finished the job in one day and we are very happy with the work , thank you again Kieran .
I represent a company with a strong and established presence in the market. Specializing in bathrooms, kitchens, and comprehensive renovations of real estate and apartments, we have 33 years of experience in delivering high-quality projects. In addition to renovations, we also offer services in loft conversions, new extensions, and other general building works. Our expertise and track record ensure that we can handle a wide range of construction needs with precision and excellence.
Andrew excellent job removing an old bathroom and installing a new walk in shower & toilet. A good job well done quickly with plenty of updates
I am an experienced builder. i have built my business up through a good reputation. I have 21 years of experience within the building trade with qualifications within all aspects of plastering and rendering. I have a small team of skilled tradesmen, including roofers, carpenters, and plumbers, which enables us to take on a wide variety of jobs and complete them to a high standard.
Excellent work. They really go the extra mile to make sure the work is done right. Very happy with what they have done for us. I've already recommended them to people and I will 100% use them again.
ALEX AND SONS LANDSCAPING, BUILDING AND GARDENING SERVICES
Cellar & Basement Conversion
We are a reliable and successful company and we provide the quality and the qualification of the work and product which we are doing for you .Our motto is, my customer my boss. We coming for a long journey experience working of 20 years working experience in Spain,Italy, United kingdom and Romania of landscaping industry and inside and outside house design of isolation,consolidation, any work of tiles or painting. We coming with the real quote of the work we try to be in competition with the construction quotations and to make our clients to make our publicity for work and quotations
Alex visited me for a quote. One member of his team came on the same day and did the front garden quickly and efficiently.
Delighted with job Dave did raising my summerhouse to put sleepers underneath and increase airflow.
Conversion, Extension, Alteration, Renovation, Kitchen, Bathroom, Bedroom, Loft, Garden, Brick laying, Plastering, Tiling, Joinery, Plumbing, Part P Registered Electrician, Repairs, Decorating, Paving, Summer House, Fence, Garden
Building services and property maintenance. 12-month warranty. Howdens Assured Kitchen Installer, Wren Kitchens Assured Kitchen Installer, Level 3 Award in the Requirements for Electrical Installations BS 7671, Level 3 Certificate in the Building Regulations for Electrical Installations in Dwellings.
Thank you very much for the professionalism and quality of the job you did. Ifs not if I would hire you again but more like when.
Excellent time served Plasterer with 16 years building experience all over the UK .No job to small and always to highest standard possible. Experienced with:Skimming,Boarding,Damp proofing, wall removal (Steel work), extensions, Rendering, roofing, tiling, bathroom fitting Coving,brickwork , joinery. All work is guaranteed . Give us a call for your free quotation
Brilliant job! Shaun and his team were very punctual arriving early doors and worked non-stop. Did everything we asked for to a very high standard nothing was a bother. Lovely group of lads who we'd highly recommend! Thank you!
"with 20+ yrs of experience I pride myself on delivering high quality maintenance projects on time and within budget. Contact me today and see how i can help you to complete your projects as you imagine, regardless of size big or small"
Established since 1985. Specialising in all forms of Internal and External building work, including Bathroom & Kitchen installation, Plumbing & Carpentry work. If you are looking for honest and quality workmanship Call for a free quote Today...
Lynden repaired our old oak front door with great skill and care. He refurbished it on site in three days, sanding and treating the door and replacing the rotten timber threshold the lower door jambs
Hi thanks for reading our profile, at pjl we specialise in everything building big or small. We put ourselves into the customers shoes and realise getting building work done on your home or a commercial property can be a stressful time and try to make the process as easy as possible for you whether it’s just a quote and guidance or taking on a small or large scale project. The aim from our point of view is total customer satisfaction at the end of each completed project keeping all our site areas clean and tidy throughout.
With experience from Italy and from U.K in painting and decorating. Wi try to doo our best for the client, to give quality , responasability,advice if its necesary in our jobs. We belive your home should reflect your personal taste and style.
Had bathroom window sill and window repaired, excellent service, highly recommend. Came out and gave us a quote and then came to do the job within a week to high quality, well-priced and very efficient. Thank you!!
Company I have I opened 5 years ago. I also worked for some contacts ratings are visible and you can turn them on to see it.
Bogumil is a master of his trades. He was one of 3 trades people that turned up and was by far the most professional. Always on time, straight forward with pricing and kept us updated all through the job. Went that extra mile to help us with a couple of issues we weren't aware of and sorted everything! Will definitely be saving his details for any future jobs. Thanks again for all your help with our flat
We have been trading for 23 years in plumbing. We offer all plumbing needs. We also have an emergency call out.
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