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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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LBD Kitchens
House Extension
HELLO. MY NAME IS GRIGORE CHIS A MULTI TRADESMAN WITH MAIN TRADE CARPENTRY, JOINERY WHO WORKS IN PARTENERSHIP WITH 4 OTHER PROFESIONALS. WE COVER A LARGE RANGE OF TRADES LIKE CARPENTRY, ELECTRICITY, TILING, PLASTERING, PAINTING, PLUMBING.
Fast response; prompt communication; understood parameters and limitations; completed job super well and quickly. Intend to hire again for a number of jobs.
Hi we been doing these jobs for last 20 years .what are the company does ! hard landscaping and soft Landscaping? brickwork paving and patios wooden and Concrete sheds ?fencing general tidy and drainage? And driveways?. Please give us a try you’re not going to be disappointed as you can see all my Your writing is five star thank you?
Shpend and his team did a great job for us. Really good value for money, and great quality of work. He was very professional and gave his expert advice when needed to help decide on best approach in resolving pre-existing issues. We would definitely use this company again.
My name is Dean. I am a good reputable builder. I am a bricklayer & roofer by trade. I am reasonable on price but we don't cut quality we only use the best materials.Being a general builder I offer all services , roofing, brickwork , groundwork, fencing
We are very pleased with the work that was done. There was a quick response to the job that day via a telephone call. An appointment was scheduled for a couple of days later and the work was started early that day & completed that same day. The workers were on time, polite, knowledgeable and proficient. They promised to make a visit a week later to remove the supportive structure and did exactly so yesterday. I am very pleased with the work and their professionalism.. i highly recommend them. Well dodone
Hello. My names Luke. From Allsop design and build. I am a carpenter and all round general builder, we are friendly and happy to help with any problem you may have. Looking forward to hearing from you. Many thanks
Luke came a sorted some squeaking board on my top of stairs Landing. Did a superb job, no squeaking after hea finished. Luke is very kind, respectful and proud to do his job correctly to keep customer happy. Thank you Luke. 5*****
Bridgeway Interiors
House Extension
At Bridgeway Interiors, we specialise in transforming homes through the supply and installation of high-quality kitchens, bedrooms, and bathrooms. With a commitment to exceptional workmanship, attention to detail, and customer satisfaction, we help homeowners create stylish, practical living spaces that add value and enjoyment to their property. Whether you're looking for a contemporary kitchen, a bespoke fitted bedroom, or a luxurious new bathroom, we provide a complete service from design and planning through to installation and finishing. We work closely with our clients to understand their vision, lifestyle, and budget, ensuring every project is tailored to their individual needs. In addition to our core services, we collaborate with a trusted network of experienced trade professionals, enabling us to deliver complete home improvement and building projects of all sizes. This allows us to offer a seamless service that covers every aspect of your renovation, extension, or refurbishment project without the need to coordinate multiple contractors yourself. Our wider services include: • Home extensions • Orangeries and conservatory upgrades • Garage conversions • Media wall design and installation • Flooring installation including laminate, LVT, engineered wood, and tile flooring • Plastering and decorating • Electrical and plumbing works • Structural alterations and general building work • Internal remodelling and refurbishment projects By working with skilled and reliable tradespeople, we ensure every stage of your project is completed to a high professional standard, on time and within budget. We understand that undertaking home improvements can be a significant investment, which is why we place great importance on clear communication, transparency, and keeping disruption to a minimum throughout the process. From a single-room renovation to a complete property transformation, Bridgeway Interiors provides a professional, dependable service backed by quality craftsmanship and a genuine passion for improving homes. We take pride in building long-lasting relationships with our customers, with much of our work coming through recommendations and repeat business. If you're planning a kitchen, bedroom, bathroom, extension, garage conversion, media wall, flooring project, or any other home improvement work, we'd be delighted to discuss your requirements and help bring your ideas to life.
Harris and Moore Bespoke
House Extension
We have a modern outlook on construction. using the latest materials and technology we are increasing precision, speed, quality and efficiency. Yet we believe in old values, trust, respect and honesty. Our process is a fusion of creativity and precision, not just “turning every idea into reality” but working with you, offering our skills and expertise so an informed decision can be made at every step of your project that is right for you.
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We are a groundwork’s and building company with 20 years experience
Jay and his team were very pleasant and helpful, turned up on time, finished the job on time and did a good job. Everyone who has visited me since the job was done have all said what a good job they have done. I would recommend them to anyone. Thanks to Jay and his team
Muddy wood projects has been running for almost ten years know but I’ve been a carpenter for fourteen years working for home owners business owners and even schools from little jobs to full refurbs we have a guy for the job we believe we work hard and long to get to that extra mile for our customers we have many recommendations and photos We are fully insured for £5m public Liability and £10m employers liability All our guys are fully qualified for there trade We all have the right tool for the right job We will make your project our responsibility and make things happen we are on other sites with many more reviews Hope to hear from you soon
A really nice, friendly team. Very knowledgeable, polite and tidy and all team members friendly and easy to talk to. Have already asked them to quote another project. I can definitely recommend!
Hi Our friendly experienced team provides a complete service. We can take care of your whole project large or small including new boilers, kitchens, bathrooms, gas, plumbing and all central heating works. We Look Forward To Hearing From You! Best Wishes JDL team.
Next Level Construction
House Extension
Nextlvl Construction (London) We carry out renovations, extensions and building work across London and nearby areas. We’ve been trading for 7+ years. We focus on jobs being: properly planned kept tidy finished to spec done with clear pricing and communication What we do: Extensions & conversions: lofts, basements, garages Renovations: full refurbs, layout changes, structural work Kitchens & bathrooms: rip-out to finish, including plumbing and electrics Carpentry & joinery: fitted units, doors, stairs, custom work Roofing & exterior: flat roofs, fascias, soffits, cladding Finishing: plastering, tiling, flooring, painting and decorating Security & tech: CCTV, alarms, AV installs Cleaning: post-build and end of tenancy How we work Written quotes with a clear breakdown Realistic timelines and updates as the job progresses Site kept tidy and waste cleared Building regs considered from the start Snagging handled properly before sign-off If you’re planning work, we can take a look and provide a free quote. - Fully insured. - References available. - Before and after photos of recent work available on request. - We can work to drawings or help you plan the build. - We’re used to working in occupied homes.
Home Plumb UK
House Extension
Gas Engineer, Heating Specialist & Plumber Specialising in; - Installations (Boilers, Heating, Bathrooms & Kitchens) - Maintenance (Servicing & Repairs) - 24hr Emergencies Gas Safe Registered with over 15 years experience
We are a team of building professionals with over 10 years' experience in the construction and renovation of commercial and high end residential properties. We pride ourselves on ensuring customers are completely satisfied with not only the finished project but also the process. This means our customers are usually recommended to us by friends and existing clients. As a result, we have more and more customers returning to use our services. We value attention to detail and take pride in our ability to listen closely to our clients to deliver premium construction projects to your total satisfaction.
Petre and his team were exceptional. He was able to complete the entire job including plumbing, complex fitting of worktops and three sided breakfast bar, splashbacks and hardwire electric installation in just three days and to a brilliant standard. The company is super responsive to emails and nothing is too much trouble. They are great at problem solving and the finish is first rate. Polite, tidy, skilled, talented and efficient, he double checked every detail with me so we got what we wanted. Delighted.
We are a local company providing honest service with quality and very competitive prices. Conversions extensions bathrooms and kitchens are our main line of work with all experienced trades on board to see the job through from start to finish.
If you want your project to be professionally done with the minimum of fuss and input. With clear and constructive ideas from Luke about what the best solution is to maximise the space and make the building flow as it should then PG Developments are the team for you. Exceeded our expectations.
Here is a description about my company testing 2 updating just testing
Did a very good job
Hello, My name is Justin, we run a Construction & Carpentry company based in Castle Cary Somerset. We have been established now 20 years. We are a member of the Federation of Master Builders and Trust marked. who have inspected the quality of our work. We are also a registered Company to undertake room in roof work/ insulation under the government Green home grant scheme. We are competitive and reliable and look forward to hearing from you. Justin. JA Construction & Carpentry Ltd.
I was really happy with the work completed on our decking. They were friendly and professional. I would definitely recommend.
Apex Building Group Ltd
House Extension
We have been trading for 18 years and specialize in painting, decorating, building work, full-scale refurbishment, bespoke wardrobes, kitchen installations, and high-end bathroom refurbishments.
fantastic work from very nice professional team - will employ again
Hello! We are a team of tradesmen who work hard to make building ideas a reality. With all our commitment and skills, our work is up to a high standard. Full refurbishment, extensions, lofts. Feel free to ask for a quote. Anytime you are welcome.
Very conscientious, I’m Well impressed with how Professional and reliable Oleg was and this is 6 months after he finished the job.
Hi, I have over 12 years of experience in the construction and renovation industry, with specialist expertise in: * Drylining * Carpentry * Restaurant refurbishments * House refurbishments * Loft conversions * House extensions * Bathroom Renovation Over the years, I have built a trusted team of skilled and qualified tradespeople, allowing us to manage projects from start to finish — from planning and groundwork through to the final finishing touches. Our Services Include: * Plumbing (Gas Safe registered) * Electrical work (fully certified) * Roofing * Loft conversions * House extensions * Groundworks * Gardening and landscaping * Fencing * Waste removal No job is too big or too small. We take pride in delivering high-quality workmanship, reliable service, and excellent communication throughout every project. I’m always happy to offer advice, answer questions, and discuss your requirements with no obligation. Thank you for taking the time to visit my profile. I look forward to hearing from you and helping with your next project
Job done to very good quality but job did run over due to the Christmas period overall very happy
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