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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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We specialise in Commercial Groundwork & Residential extensions. This includes: Structural Underpinning, Retaining walls, Trench foundations, metal reinforced concrete walls & floor slabs, Garage and Basement conversions,
Andrew from Eland Construction left us with a very good impression, sadly we had to postpone the job for personal reasons, but he was very knowledgeable and left us a feeling of trust right from the start. He did listened to our needs and understood perfectly well the proyect we had in mind. I will call him again.
THE GCD GROUP LTD
House Extension
GCD Developments is a multi-disciplinary property practice, covering property development, project management, architecture and interior design across London and United Kingdom. Whilst every project is unique, the philosophy behind each is unwavering: at GCD we strive to craft environments which are not just beautiful, but faultlessly functional.
Grip Build
House Extension
Our company specialises in nearly all aspects of building works. If it's extension, loft conversion, garden project, patio or driveway, structural work or just refurbishment, new kitchen or bathroom, hanging some doors or fitting skirting, plastering room or two, even new lick of paint, we are here to help you achieve your goals and dreams so you can be proud of your home or your rental properties. With 28 years of experience in various trades, there is not many jobs we can't do. High quality of the finish and your satisfaction is what we are aiming for with each of our jobs. We completed vocational education in building industry in trades of bricklaying and carpentery. We are registered kitchen, bedroom and bathroom installers for two well known companies and registered with BiKBBI. You can rest assured your job will be done in professional, tidy and timely manner. We use electricians which are NICEIC registered and Gas Safe plumbers, so each job is safety guaranteed. Looking forward to work not just for you, but with you to get you results you are striving for.
Our company is consisted of me and my cousin. We have more than 15 years of experience.
They were polite and very reliable.
lincs building services
House Extension
I have been in the building trade for 20 years and I specialize in property renovation but I have worked on new builds
Future Form Construct LTD
House Extension
We offer wide variety of construction services for Rochester and the nearby surroundings. With more than 13 years experience we are trusted and reliable builders with many satisfied customers. We give tailor made services to fit every budget and requirements. Friendly, professional, competitive prices.
lukethepainter
House Extension
With 20 years of decorating experience you can be sure that I will leave you happy that you chose me to decorate your property.
My name�s is John and I�m the owner of EAGLE SERVICE PROPERTY MAINTENANCE is a Company based in Bournemouth,providing all aspects of building maintenance and offering a friendly, reliable and honest service. I have worked in the building & property maintenance sector for the last 18years, dealing with most household jobs from the minor (electric,plumbing,carpentry ) to complete renovation of flats and houses. If it\\\\'s a job that you can\\\\'t do yourself or need advice don\\\\'t hesitate to get in touch with us!!
What should have been a straightforward connection of electric oven to wall spur turned out to be not the case, due most likely to a problem with the (brand new) building’s wiring - John of Eagle Service went above and beyond to try and resolve the issue, which the council have now passed on to their builders to address. We have nothing but praise for John, and would happily use him again. John was friendly, efficient, professional, on time, and a pleasure to have in to do the job.
Good,clean,efficient work carried out quickly.
Ciaran Building Services
House Extension
C & F Construction Limited is a leading Construction and Building Company based in Leigh-On-Sea Essex. We undertake all aspects of Building works from New build homes, Extensions, Refurbishments, Loft Conversions, Horse stables, Swimming pools, Fish ponds & Much Much More! We are a Company put together by time served builders to provide a high quality, professional Building service that will stand proud of the rest. We are only happy when the client is happy. Tradesmen that work for C & F Construction have been vetted and approved to ensure they are qualified and insured. we have developed our Services as a leading Building Company around our central beliefs of outstanding workmanship and clear, honest communication. This dedication to our clients has played a vital role in our status as one of the most trusted and most recommended builders in Essex. The services we provide as a Construction Company in Essex are: Extensions - Loft Conversions - New Builds Homes - Renovations - Refurbishments - Horse Stables - Fish Ponds - Swimming pools Etc As a customer-focused Builder, we provide our Customers with a free no obligation consultations and quotations for all the Building Services listed above. Unlike some New Build Builders or Extension Builders we recognise that we are creating or working in someone’s home. This is why we pride ourselves on our reputation for being clean, trustworthy and reliable.
I'm a self employed builder with over 12 years experience. I take on jobs of all sizes. I strive to do a quality job for a reasonable price always taking pride in my work
I have no hesitation to recommend George for any works his detail to finish makes his workmanship above and beyond any other works I have ever seen, George has also repointed the the entire front and rear of our property along with Chimney and ridge tiles the house looks even better than a new built house, he is an expert builder who takes pride in what he does. So much so I have already asked for further works to be done.
Skender Sokoli
House Extension
I’m Skender Sokoli who is an independent worker, when it comes to getting the job done right you can count on me. I’m highly skilled in plastering, painting, vending, and other sort of things. Whatever you need done you can count on me.
JW CARPENTRY AND BUILD LTD
House Extension
Welcome to JW Carpentry & Build Ltd – a reliable, cost-effective builder based in Bristol. Established in 2020, we’re a family- run company, priding ourselves on delivering outstanding results that enhance your home’s value and functionality. Specialising in beautiful house extensions, property conversions and property renovations, we approach every project dynamically, delivering to your requirements and transforming your home to suit your needs. From new roofs and emergency roof repairs to full property conversions and storm damage repairs, we handle every project with care and expertise. Whether you’re planning a complete new build home, private development, or restoring a listed building, we can provide a fully project-managed service from start to finish. Our skilled team ensures high-quality craftsmanship, prizing professionalism and attention to detail.
Forty years experience in the building trade, all types of repairs, alterations, updates, all our work is to the highest standard and guaranteed, punctual clean and tidy!
Very pleased
Hi we are James and Dave of D J Plumbing,Heating and Bathrooms, We have over 25 years experience in the construction industry and are both time served tradesmen. We pride ourselves on our extensive experience and quality of work, using only quality products and an excellent installation service. We are so confident we even offer an twelve month guarantee on all our work. Let us enhance your home, Why not call us now and see what we can do for you..
Excellent high quality service. Both Jamie and Dave have done a fabulous job on refurbishing 2 bathrooms in an old property. Reliable honest and as good as their word - will be using them again in the future for other jobs. Couldn’t recommend them enough.
From the initial quotation - which was very reasonable – until the final job, Kaspars was very professional and did a great job plastering my bathroom ceiling. He was always prepared to work within my timeframe, arrived on time and was very, very thorough. It was a pleasure dealing with him. A really genuine guy. Will definitely use him again.
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Hi we r family run business with over 20 years experience in the building game we carry out all types of building work from new builds to extensions two full ? refurbishment all types of groundwork ?drives ways patios jet washing painting all types of of construction fully in insured highly experienced company look forward to hearing from you
Honest reliable and hard working man. Very pleased with the results. Price quoted for unseen work involved was fantastic. Would recommend and definately hire again. One very happy customer
XProbuild Ltd is a London-based building company specialising in high-quality construction, renovation, and refurbishment projects. From roofing and structural works to full property renovations and bespoke garden houses, we deliver reliable, professional results — on time and on budget.
Lucian and his team were a dream to work with on our house renovation. They're professional, competent, and lovely company. The job was completed in good time, and without additional costs. Lucian went above and beyond to make sure we were happy with the finished project.
At FREN, we are proud to offer a wide range of building services in South Bristol, designed to bring your ideas to life. From small-scale residential projects to large landscaping transformations, our skilled team delivers results that combine style, strength, and functionality. Every project is carried out with a commitment to high standards, ensuring your home or outdoor space is built to last.
Ben responded to my posting within the day. He arrived when he said he would and fixed the problem very swiftly. Very reliable, professional and polite service. I would recommend and would not hesitate to use Fren again.
A full service firm. We are able to tailor our offering to suit your demands from full service project management to small scale one off projects
Although a small scale job, Patrick was quick to respond to my post and very kindly talked me through a few options, which was very useful and much appreciated. Great that he was able to carry out the work so soon even with my tight timeline. Very satisfied with the result and price within my budget. Thank you, Patrick!
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