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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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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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Carswells construction & plumbing has been established over 10 year for a during that period of time we have built our business on reputation, word of mouth and dedication in order to provide our customers with the best possible services in all Building works specialise in extensions all building work & bathroom fitting
I recently had Luke and his team widen an opening between two rooms in my property, which was a sizeable job requiring the installation of a steel beam. The work was managed efficiently, and great care was taken throughout the project. I’m very pleased with the results and would highly recommend Luke and his team for their professionalism and attention to detail.
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Very fast service. Well within my budget.
www.kbaconstruction.online MAKE YOUR HOUSE INTO A HOME TODAY WITH KBA CONSTRUCTION'S We are a building company with many years combined experience. working as Builder in London (UK), we help to make your house a home or property investment you can rely on.
Did a fantastic job and at good price
T G BUILDING PROPERTIES LTD With over 40 years of experience in the Bristol area, T G BUILDING PROPERTIES LTD is a trusted name in construction. Renowned for our expertise in building control, we work closely with architects and structural engineers to deliver high-quality results across all types of projects. Our extensive experience includes: New Builds: From ground-up construction to final finishes, we handle every stage with professionalism and precision. Conversions & Extensions: Whether you’re transforming an existing space or expanding, we have done it all. General Construction: With a wide skillset, we cover everything in the construction field, ensuring that your project is completed to the highest standards. We are fully insured, with public liability insurance, giving you peace of mind throughout the project. Simply send us your pictures, plans, or drawings, and we’ll be happy to provide a competitive quote. For reliable, experienced construction work in the Bristol area, trust T G BUILDING PROPERTIES LTD to bring your vision to life.
Provided a neat and complete work by cutting the wall and squarring the archway. Very professional.
D Building Ltd is a leader in Rendering and Plastering services. Brickwork repointing With more than 17 years of experience we offer the highest quality decorating, renovation and refurbishment services to domestic and commercial properties.Our priority is to ensure the customer are left satisfied with our service we provide We can offer a 24/7 service always ready to make customers feel comfortable You want to save energy get your house insulated throughout Greater London
Great service, fast response and flexible on price. Really pleased with the quality of the finish.
John McKinney Builders have been building on over 50 years of experience, established in 1970. We carry out extensions, loft conversions, refurbishments, garage builds & conversions , kitchen fitting , heating etc. From planning to completion. Our quality of workmanship & finish is second to none, no snagging needed or call back. WE SPECIALISE IN THE INSTALLATION OF RSJ,s
Hard working dedicated team, building a family run business with a keen eye to detail and professional work. Reliable trustworthy and professional establishing a good word of mouth where most of our work comes from tried and trusted. We can undertake jobs small and large, commercial or residential. Please see our website ask for details We look forward to working together to create your dream Full insurance, CSCS, NPORS machine operator, first aider 15 years experience on big construction sites
Phil and his team, exceeded our expectations, The professional advice and workmanship was excellent. We had a number of challenges with our garden layout which Phil was able to address, he’s very patient and customer focused. We would highly recommend his services for those looking for a quality and reliable finish. Thx Phil for transforming our garden…
At Optimal Finishes , we understand that choosing a contractor is a big decision. That's why our team of specialists and multi-skilled tradesmen is committed to delivering high-quality work with integrity for over 25 years . With a strong record of positive reviews from satisfied customers, you can confidently rely on us. We provide clear, competitive quotes and stick to them—no surprises. We proudly accommodate services for both residential and commercial clients. Our services: -Painting Interior and Exterior Painting Mould and Damp Control -Flooring Installation Laminate, Vinyl, Hardwood, and Engineered Flooring Removal and Installation. Underfloor Heating Herringbone -Tiling Wall and Floor Tiling Splashbacks Tile removal and replacement Bathroom installation Exterior tiling Wet room installation Underfloor heating Swimming pool tiling -Carpentry Bespoke Furniture and Fixtures Doors and Windows Staircases Kitchens -Plastering Decorative Cornicing / Plasterwork Dry Lining & Plasterboard - Installation and Repair Internal & External Rendering Plaster Skimming Polished / Other Plaster Finish Screeding/ Standard Coving -Roofing Chimney repair Clean gutters Roof cleaning Flat roofing Gutter installation and repair Pointing Roof inspection, Installation and repair Solar panel installation Why Choose Us: Our team is passionate about delivering great results. With a 9.8/10 rating from local customers, we take pride in our reliability and quality. We know every project is unique, so we work closely with you to make your vision come to life. Using top-notch materials, we ensure a beautiful, long-lasting finish. Plus, we value your time and strive to complete every project on schedule, making the whole experience as smooth and enjoyable as possible! Ready to transform your space? Contact us for a free quote within 24 hours. Let's discuss your project, and we'll provide you with a detailed estimate.
Great team, great work, brilliant service. I asked got my daughters room to get split with a partition wall and they done an amazing job. They was thorough, fast, great work. Really polite, great communication and would definitely use for future work
R&D CONSTRUCTION IS A PROFESSIONAL DESIGN AND BUILDING COMPANY SPECIALISING IN ARCHITECTURAL DESIGN AND PROJECT MANAGEMENT FOR RESIDENTIAL AND COMMERCIAL PROPERTIES, ALSO A WIDE RANGE OF CONSTRUCTION, DEVELOPMENTS AND REFURBISHMENTS. We Carry out all type of construction and to us no job is a small job and by that we mean we would be happy to take your various jobs in our hands. We provide the following list of the building services: New Build Property Refurbishment Loft Conversion House Extensions Flat Conversion Driveway & Patio Bricklaying & Re-pointing Kitchen & Bathroom Roofing & Guttering Plastering & Tiling Carpentry & Joinery Painting & Decorating Plumbing & Electrical Central Heating & Under Floor Heating Design We believe a great design is simple and not only how it feels or looks but also how it works. We provide Architectural and Interior Design and Engineering Services: Initial Concept Design Basic Drawings for Planning Application & Application Management Existing & Proposed Floor Plans, Elevations and Sections Site Plans and Block Plans (OS map/ Location Plan) Detailed Architectural Design 3D Concept and Visualisation Design Interior Furnishing, Materials & Fabrics Lighting Design Bills of Quantities (BOQ) 3D Interior Visualisation Design 3D Interior Visualisation Design Building Control package Drawings & Application Management
Hello everyone, I am civil engineering, I worked with different company in France and UK , I finally decided to create my own company COMFOROOMS LTD. I have long experience in building and groundwork . I am a serious person, I like my job, I respect my customers and I always tried to make them happy. I promise you a good job, nice and clean. You have my warranty for every job I will do. I am looking forward to hearing from you soon Thank you H.Turki Director
Came the morning after I posted the job, a Sunday, and completed efficiently and without fuss. Very friendly and polite. Will definitely use again.
Belgravia-based company offering handyman and cleaning services in London. We cover all London locations but work mainly in Belgravia, Pimlico, Victoria, Westminster, Mayfair, Chelsea, Knightbridge, South Kensington... Large and small jobs accepted Reliable, experienced and fully insured staff Free no-obligation quotations Quick response time Best prices in central London
Called immediately and sent someone within 2 hours, when id asked for 2 days - unbelievably quick. Really reasonably priced, professional job, handyman was polite and fixed my cupboard and drawer. Highly recommend.
Specialist in home improvements
Andy came on the day and time specific and carried out the job to an excellent standard. Really happy that Andy contacted me to quote and really happy with his work. Will definitely contact Andy again for any other jobs I have.
From a single wall to a complete house, inside and out, plastering/rendering. Also roofing, stonewalling, extensions and general maintenance....no job too small. Please feel free to email me or leave me a message and I'll get back to you.
Reliable, personable, conscientious, trustworthy and reasonably priced. Can definitely recommend .
We are a family owned company, that was established in 2006. We specialise in the fitting of kitchens, bathrooms, bedrooms, Garage conversions, Cladding and so much more.. We have a large portfolio of our work, Our tradesmen are all time-served in the trades and boast the relivent qualifications needed to carry out there tasks. please also feel free to take a look at our Facebook page Marden Carpentry Services for more pictures of the works undertaken.
Welcome to custom home improvements and thank you for visiting our rated people page We are a family run business specialising in all roofing work including: Re-roofs Flat roofs Slate Tiling Roof moss removed Chimneys Ridge & Hip tiles Lead work and Valleys Upvc fascia, soffits and guttering - cleaned, repaired and renewed. EPDM Rubber roofs. We give free estimates and all work is guaranteed so don’t hesitate and give us a call
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
Hi my name is Tom I’ve been plastering for 20 years. I provide a clean helpful service and i do my up most to meet customers requirements
Tom came to skim my son's ceiling but because it had old artex and very uneven he decided to put a false ceiling in, board that and then skim it. Tom is a really friendly guy, kept showing me where he was up to in the job and was very tidy and did a great overall job at a good price. Wouldn't hesitate to use Tom again or recommend to friends and family.
22 YEARS EXPERIENCE ON BUILDING and construction. With my team we did from Garden Landscape all the way to new build yet making sure Clinet saves as much as possible on they projects cost . We are qualified Gas safety Electrical Plumbing We specialaise on: Loft conversion Bathroom Kitchen Extensions Paiting and Decorating Plumbing Roofing Garden Landscaping Insured and insurance backed services
Prompt efficient service. Left area clean after work completed.
Goat Waste & Maintenance
House Extension
We work off trust and quality of work, along with the best customer service, making sure clients are happy and satisfied at all times. We have a combined total of 25 years experience in the Maintenance and Waste Trade in the Oxfordshire area. Fully insured and licensed up to 10 million for customers and employees. Please do not hesitate to contact us, we look forward to hearing from you.
RSP A1 CONSTRUCTION LIMITED
House Extension
Hi I'm Lovejeet Singh (Lucky), the managing director of RSP A1 CONSTRUCTION I now have 17 years of experience in this trade. We provide a full building service. Loft conversion, Extension, Full Refurbishment and many more. We are a team with intelligent, physically strong, hardworking, and professional tradesmen who give 100% all the time. We are always on time at work and finish within time scale. WE WILL ACHIEVE YOUR VISION and most importantly NO SHORT CUTS
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