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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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Tani Dauti Building Services
House Extension
I have over 25 years experience in the building service.
We are a family run business based in south wales. We will travel far and wide to help our customers with needs and home improvement requirements.
Really poor experience it’s now 6 months and kitchen still not finished I’ve given up Still waiting for certs for electrical works honestly don’t use they are lovely guys but take on too much work and don’t finish anything
Gary O'Connor
House Extension
DJ Construction Family run business with over 40 years experience. -Groundworks -Construction -Plastering -Carpentry -Roofing
Dh Property Services is a newly registered company who are happy to quote for any size job. 15 years in a manufacturing and installations ranging from flat pack furniture to complete kitchen/bathroom installs. commercial, domestic and landlord services
Great service from Dave, excellent job painting my summerhouse. I can recommend highly.
Stewart my work partner and myself Adam, combined have over 60 years experience in the building industry. We run a small friendly team of committed guys that have everyone in mind when it comes to health and safety and maintaining a clean and tidy work site with minimal disruption while works commence. Our primarily trades are carpentry/joinery, bricklaying, plumbing, plastering and landscaping. however Stewart and i alone have served lengthy apprenticeships with our fathers and right from the off have turned our hands to all aspects of the building trade. Most importantly we value our customers criteria and strive to go the extra mile in both keeping to strict rota and maintain the job is not only completed within the time frame but to a high standard. We honour our good reputation of being punctual and polite and most importantly easily approachable combined making it an easy working atmosphere which we feel is vitally important. We the team at Artisan's construction look forward to meeting new people and taking on new challenges, The dexterity of work we have undertaken is so varied but generally based around the property development aspect for example... extensions, loft conversions, renovations, layout alterations, roofing, ceramic tiling, landscaping and so much more. We have had years of dealings with building control planning and developing and a good able knowledge of using architectural drawings and structural engineers reports. Where and when appropriately we have an electrician and plumber on the team that can competently carry out works and sign off respectively. We as a team look forward to being of service and making you proud you've come on board and will strive to achieve this work based relationship. Thanks for taking the time to browse our page and take care, kind regards from all the team at Artisans.
Thanks for the hardwork
At MD Contractors LTD team of builders are proud to provide our customers with the best quality of home improvment service. We guarantee top-class workmanship and a flawless finish. We work with complete respect for our client’s time,budget,and property;and you won’t need to worry about coming home from work and finding your house in complete chaos as we will always clean up after ourselves at the end of every day. Best regards,Tony”
Would highly recommend Tony. Super efficient for first communication, he came to the house to quote the same day and completed the following week. Job finished to a high quality
I have had my own company for 32 years, we are a team of six. We are an honest team and work together. We are a family run business. We specialise in fitting kitchens bathrooms and extensions.
Marcel worked efficiently to deliver a high quality finish to our bathroom renovation. He communicated what he was doing at each stage of the renovation and was helpful in sourcing the materials. He worked long hours and always cleared up after himself. Marcel is friendly, honest and hardworking. The quote was very reasonable in comparison to other quotes we received, our first quote was honoured despite the job being more complex than initially anticipated. We will be using Marcel again for other jobs.
If you are thinking of extending, converting, or in any way structurally altering your home, we can assist you with any or every stage of your project.
Paul did an excellent job of removing the old storm porch that was attached to my front door. Everything removed, rubble taken away, great chat & well priced. I wouldn't hesitate to recommend Paul to anyone looking to get some demolition work done! Thanks Paul!
With years of hands-on experience in the industry, we are committed to providing reliable, high-quality service with a focus on customer satisfaction. Our team specializes in delivering professional solutions tailored to each homeowner’s needs, whether it’s repairs, installations, maintenance, or complete project management. We take pride in our attention to detail, honest communication, and dependable workmanship. Our staff is fully trained and continuously educated on the latest industry standards, techniques, and safety practices to ensure every job is completed efficiently and to the highest standard. When you work with us, you can expect professional service, transparent pricing, and results you can trust.
Excellent. When no-one else would quote, he diagnosed a fault in an obsolete fluorescent light and fixed it instantly. Just started in business and seemed unsure of how to collect payment, but sure he will soon sort that out. Will certainly use again.
Hi, I’ve 25 years experience in joinery, from new builds to renovations. I do alot of garage conversions,man caves, sun rooms and loft conversions at the moment, as well as all general joinery. From doors to lofts (no job too big or too small)
We hired Ionut to lay some decking and build two planters and some bench seating as well as landscape the garden and laying a new lawn. Ionut and his team did an exceptional job - the work is very neat and professional and we ended up with a great finish. They were polite, respectful and worked very hard. I have already recommended Ionut to a friend and hired him for another job (laying slate slabs) which was also done incredibly well.
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Excellent, efficient job and area was left incredibly clean and tidy at the end. Very good communication throughout the quoting and arranging process. Highly recommended.
GD DIBDEN GENERAL BUILDERS
House Extension
We cover all general building works small, medium and large builds at a very high standard of work.
NICUABRU SERVICES LTD is a company formed over 7 years ago, specialized in flats, houses renovation and house extensions. Our aim is to provide good quality services at a reasonable price and customer satisfaction is crucia
Fantastic work, above and beyond what we asked them to do. Very happy with the finished job, done quickly too. Also great advice on other aspects of the refurb. Would definitely want to use the guys again. Thanks Nicu and Daro.
CONNELLY'S LTD
House Extension
Connelly's Ltd has been established for over 20 years, we carry out all building works from small alterations to new builds. We have a large selection of tradesmen that have worked either directly or on a self employed basis for many years. We have hundreds of happy customers who will happily provide references, on request. All of our quotations are fully itemised and we always offer cost saving advice if we are able to do so.
About Arena Group – Maintaining Homes Together At Arena Group, we believe home maintenance is about more than repairs it’s about trust, safety, and building lasting relationships with the people we serve. With over 25 years of hands?on construction and refurbishment experience, we’ve grown into a trusted partner for homeowners, landlords, and housing providers across the UK. Our mission is simple: to maintain homes together, blending craftsmanship with care.
D L EVANS CARPENTRY
House Extension
Fully qualified carpenter with 16 years experience. All carpentry work undertaken including, 1st and 2nd fix work, kitchen installation, roofing, installation of windows and doors, tiling, etc. I have a wide range of experience with both small and large jobs including new builds, extensions and renovations. I currently have two qualified carpenters who I employ and I also have contacts within all sectors of the construction trade, which enables me to project manage a whole job if needed. I take great pride in completing my work to a very high standard and I have an excellent eye for detail. References from previous customers are available.
My company can offer all aspects of home improvements and all aspects of roofing with a full guarantee with all woks carried out I have 15 years of experience in the trade With many happy customers and our company is fully insured so rest assured
Dwain and his team did a really good job. They responded to the job post and came to do the work quickly as I needed the work doing quite urgently. They did everything I asked, and got it just right. Friendly service with a smile. Would recommend.
PRESTIGE BUILD SOUTH WEST
House Extension
We are a dedicated and reliable team of local tradesmen with over 20 years experience in all aspects of general building that have combined forces to offer professional services at competitive prices. We are Fully insured and offer no obligation quotes. We are new to rated people hence why we haven’t had any reviews as of yet, but please check out our Bark site on Google and the photos of our 5 star reviews.
RM Tiling
House Extension
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