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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
At Rated People, we understand how daunting it can be to invite a stranger into your home for a major project like a house extension. That’s why we connect you with trusted local house extension experts who have been thoroughly vetted and reviewed by other homeowners. With over 10,000 skilled tradespeople on our platform and more than 3 million satisfied customers, you can count on us to find the right professional for your house extension needs.
We know that large projects can be overwhelming, so we provide extra support to help you find all the right tradespeople to ensure the job gets done right. You can check previous reviews to see the quality of work our tradespeople deliver, giving you peace of mind before you start. If you need more information, read through our helpful guide below. And if you are a house extension expert, click on the link below to sign up with Rated People.
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Local house extension experts
What is a house extension?
A house extension is a significant home improvement project that involves adding extra space to your existing property. This can be achieved by extending the structure outwards or upwards, creating additional rooms or expanding existing ones. House extensions can range from small single-room additions to large multi-room projects that completely transform the layout and functionality of your home. Common types of extensions include:
- Single-Storey Extensions: Ideal for expanding living areas such as kitchens, dining rooms, or living rooms.
- Double-Storey Extensions: Add multiple rooms and increase overall living space without sacrificing garden area.
- Loft Conversions: Make the most of unused attic space to create extra bedrooms, offices, or playrooms.
- Basement Conversions: Convert existing basements into habitable spaces for entertainment, storage, or additional bedrooms.
- Garage Conversions: Transform your garage into a functional living space, such as a guest room, home office, or gym.
Cost of a house extension

The cost of a house extension varies widely based on several factors, including the size and type of extension, the materials used, and the complexity of the project. Here are some general cost estimates to help you plan your budget:
Factors Influencing Costs
- Size of the Extension: Larger extensions require more materials and labour, increasing the overall cost.
- Type of Extension: Different types of extensions (single-storey, double-storey, loft conversion) have different cost implications.
- Materials Used: The choice of materials for walls, flooring, roofing, and finishes can significantly impact the cost.
- Location: Costs can vary based on your location, with projects in urban areas typically costing more due to higher labour rates and material costs.
- Complexity: The complexity of the design and any structural changes required can increase costs. Unique architectural features, custom fittings, and intricate designs will add to the overall expense.
Average Cost Estimates
- Single-Storey Extension: £1,200 to £1,800 per square metre.
- Double-Storey Extension: £1,500 to £2,500 per square metre.
- Loft Conversion: £1,000 to £2,500 per square metre.
- Basement Conversion: £2,000 to £3,000 per square metre.
- Garage Conversion: £5,000 to £20,000, depending on size and specifications.
These estimates include basic construction costs but may not cover additional expenses such as planning permission, architectural fees, and interior finishes.
What kinds of tradespeople do I need for a home extension?
A successful house extension project requires the expertise of various tradespeople. Here are the key professionals you will likely need:
- Architects and Designers: To create the plans and designs for your extension, ensuring it meets your needs and complies with local regulations.
- Builders: To handle the construction work, including laying foundations, building walls, and roofing.
- Electricians: For all electrical installations, including wiring, lighting, and power outlets.
- Plumbers: To install and connect plumbing systems for kitchens, bathrooms, and any other water-related needs.
- Carpenters: For structural woodwork, custom fittings, and cabinetry.
- Plasterers: To finish walls and ceilings, ensuring a smooth, professional look.
- Painters and Decorators: To add the finishing touches, making your new space aesthetically pleasing.
- Flooring Fitters: To install flooring that complements the rest of your home.
- Roofers: If your extension involves roof alterations or new roofing.
- Surveyors: To assess the site, check the structural integrity, and ensure the project meets all building regulations.

Other house extension FAQs
Do I Need Planning Permission to Extend My House?
In many cases, house extensions require planning permission from your local council. However, some extensions may fall under Permitted Development Rights, which allow for certain types of extensions without the need for formal permission. It’s essential to check with your local planning authority to determine the requirements for your project.
Will an Extension Add a Lot of Value to My Home?
A well-designed and executed extension can significantly increase the value of your home. Extensions that add additional bedrooms, bathrooms, or improve the overall functionality and aesthetics of the property tend to offer the highest return on investment.
How Long Does an Extension Take?
The duration of a house extension project depends on the size and complexity of the work. On average, a single-storey extension might take around 3 to 6 months to complete, while more extensive projects, such as double-storey extensions or loft conversions, can take 6 to 12 months or longer. This timeline includes planning, design, construction, and finishing phases
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Here at Weathertite Constructions we cover a wide range of building roofing extensions conversions damp problems drainage with camera inspection, garden design with patios driveways and walls. James has 20 years experience Lee has 35 Carl has 10 we are here to provide a good service information and a very reasonable quote kind regards lee
Did a great job considering our budget and practicalities. Removed all waste and left the roof looking in much better condition.
We are an experienced team that specialize in all types of home improvements. We are friendly and professional and work to extremely high standards. Please do not hesitate to ask any questions you may have.
Great job, friendly and honest contractors
Daniel Hasani
House Extension
Hi I’m Dani New here but been for long on this trade I’m a builder and my main focus it’s the job to be done properly and client to be happy I try download some pictures in here to prove my work but that’s not enough even that I have thousands of pictures The only way to prove it’s you take the risk and trust me and I do my part and I promise you won’t be disappointed Thank you
27 years experience a company you can trust,leave nothing to detail.
Steve replaced our guttering, downpipes and a bargeboard. It wasn’t a straightforward task as it’s an old property but he did an excellent job and carried out the work quickly and efficiently at a competitive price. I would highly recommend him.
Peak Renovations offer a wide range of services including refurbishments, conversions, alterations and damp proofing. We provide competitive quotes and a complete service ensuring customer satisfaction as our many positive ratings will show.
I was very pleased with the work done by Ben and James and the other tradesmen employed by Peak Renovations. They were honest, reliable and trustworthy and a pleasure to have around. I wouldn't hesitate to recommend them. Pat O'Keefe
We are a building company that have been in operation for over 25 years We are mostly architect or customer recommendations based We can organise a local architect to produce your plans or price plans you already have We are a little old school where we will give you a competitive estimate and then show you the works we are doing also a job we have finished recently
Excellent guys, no fuss and got the job done quick and to an excellent level of quality! Highly recommend!
With over 10 years experience within the building industry and a wealth of knowledge in project management, Hill’s Home Construction will work alongside you to bring your imagination into reality. Based in Brackley, South Northants we stretch across the 4 surrounding counties providing a high quality of craftsmanship and service. Priding ourselves on an exceptional level of detail and our incomparable reliability. With price packages to suit you and a completely transparent quoting system, we allow you to build your project around your limitations and budget. We are here from planning and design to that first cup of tea in your new space! Working alongside trustworthy specialist trades, we provide a extensive list of services from garden landscaping to full home renovations and extensions. We’re now taking bookings for 2023 so please get in touch for a quote. We hope to hear from you soon!
Dan is very professional, great communication. Really pleased with front garden renovation. Would highly recommended.
Hello, My name is Michael, the owner of m p e building services est 2000, I am a fully qualified N.V.Q joiner and builder, time served craftsman who specialises in woodwork, wet trades, plastering, tiling, and brickwork/stonework including Indian stone and concrete paving, I have over 25 years experience in the construction industry, and I have all the skills and knowledge to complete your project, I am reliable friendly and honest. The photos are of my personal works which are displayed on this page, are just a tiny collection of the many successful projects I have completed for my many happy customers over the years, I have a full portfolio of photos of building projects that I have completed and lots of real excellent customer references and personal recommendations of my business, that I can provide and can show on appointments when quoting for new customers.
Arrived on time every day and built the doors on site. After which they were installed and painted. Very pleasant and respectful personality. Photo of finished job available if required.
FM Construction Project Ltd
House Extension
FM Construction Projects is a reputable company boasting 9 years of extensive experience in a variety of building projects such as loft extensions, back extensions, full refurbishments, and more, all completed with a strong emphasis on top-notch quality.
Professional carpentry & joinery services. We are a reliable and experienced carpentry and joinery team based in Littleover, Derby, providing professional carpentry services across the DE, LE, NG, ST, M and B postcode areas. With over 35 years of experience in both internal and external carpentry, we take pride in delivering high-quality workmanship, attention to detail and a professional, tidy service on every job. Why customers choose us: • Over 35 years of carpentry experience • Reliable and friendly service • Clean and tidy workmanship • High attention to detail • Experienced carpentry team • Free, no-obligation quotations Our carpentry services include: • Door hanging and door adjustments • Skirting boards and architraves • Loft boarding • hand cut roof's • fitted wardrobes • Kitchen fitting • Laminate and hardwood flooring installation • Garden rooms • Outdoor storage solutions (sheds and wheelie bin stores) • Decking and pergolas • Fencing and gates • Joists and floorboards • Front door installation • Boxing-in and bespoke cupboards Whether you need a small carpentry job completed or a larger project carried out, we approach every job with the same high standards and attention to detail. Free quotations available – please get in touch to discuss your project.
Anton was absolutely fantastic. He completed the job to perfection.He was very tidy, efficient, and finished the work to a very high standard within the promised time. A polite and hardworking professional.
We manage new and existing buildings,a portfolio of renovations and refurbishments,tiling works,paintwork,kitchens and bathrooms are all part of some of the services we provide.We will get back to you with a detailed quotation,free of charge
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.
Robert and his team were excellent. Work done to a great standard
A very reliable, hardworking, clean and tidy couple of young men ( very hard to find today). Nothing too much trouble for them and very eager to please. Would have no hesitation in recommending to others. Although our wall seemed only a smallish job (front garden wall) the work carried out was first class. Thanks again Tim and Steve for a brilliant job well done!
Welcome to Dan Construction! You've come to the right place, we pride ourselves on being the best at what we do. We have a team with a wealth of experience in the industry that will do the utmost to ensure you are happy with the service. Please get in touch for a free obligation quote.
Do not trust this man! He did a runner without completing the work, and the work completed is shoddy. Avoid like the plague, and save yourself the headache
My name is Louis Tabone, I am 56, and I have more than 35 years of experience in building, joinery and I have many different skills in home improvement. I fit bathrooms and kitchens for B&Q department. Also I do loft conversions and extensions, fences, decking and all the house renovations. All my customers are very happy with my job, as they have guaranty on all job done. Team of 5.
Caerphilly garden care Hedge cutting Fencing Grass cutting/mowing Brambles Overall tidy up of gardens and commercial buildings premises Jetwashing Gutter cleaning / repairs Flat pack building
Collected Piano and Stool quickly and took an old car battery too ????????
I\\\\'m the owner of the company, with 30 years in the property refurbishment services with multiple qualifications to cover or years of time served of most trades. I just moved locally to the area, so I\\\\'m back with rated people to get quality clients.
At Designs and Developments we welcome the chance to work with you on your project. We have the experience and technical knowledge to guide and assist you in making the correct choices. We offer a design, supply and install service or if you prefer any combination of the three. We work with selected specialist suppliers and manufactures to ensure a finish to an extremely high standard of craftsmanship. We are more than willing to go that little bit extra to ensure you get exactly what you want and more. We are proud of the services we offer which is why we are recommended time and time again. We pride ourselves on the high level of service, professionalism and expertise, all of which can be seen in the work we produce. All domestic work is undertaken — No job is too big or small. We offer Call Outs to all our customers. All work is fully guaranteed. We specialise in providing a wide and varied interior and exterior services portfolio which is aimed at giving you piece of mind by choosing one company. Our services include bathroom and kitchen refurbishments, extensions and loft conversions, flooring including tiles, laminates, engineered and solid woods, painting and decorating, curtains, wooden blinds, rugs and carpets.
Generation
House Extension
We specialise in all aspects of construction work. We are completely dedicated to our work and put our experience into the job to make our customers satisfied. We aim to do our best and succeed 100%.
One to be careful with is the electrician Ben. The work seems alright, but his advise left us with excessive lighting in Kitchen and sitting room and our decision against TV sockets in ALL rooms was interpreted as NO TV and phone socket at all, which then later had to be added at extra cost and left the choice of suppliers limited. His crew also did the plumbing and the bathroom installation and the later was not done to the general standard of U&U constructions work.
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