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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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We are electrical contractors based in Sussex undertaking all aspects of electrical installations in the domestic, commercial and industrial sectors. Family run business, keen eye for detail, all works fully insured and certified.
Great communication before, during and after the work was completed. Competitive pricing for the standard EICR and the report was sent promptly. Will certainly use Chris again for any electrical work in the future
Hello,I am Vasile! If u need any type of building work to be done please feel free to contact me and u will have Free quotes and good advice! Thanks and see u on the job!
Vasile and his team are working to a very high standard on tenant rental bathroom, made several recommendations on how to improve plumbing, fitted 15mm copper piping and large number of other improvements including carpentry and electrical wiring to best working guidelines, good job and a fair price, thank you
At P.E.P Construction ltd, we offer a wide verity of service in the construction sector, from anything as small as you can think to as big as you want and as high end From groundwork’s to Extention all the way to new builds look no further, we have a team of trades all under one roof l, with a professional and friendly service start to finish look no further
Transform Your Property – From Foundations to Finishing Touches Looking for reliable professionals to upgrade your home or garden? We are your local, all-in-one landscaping and groundworks experts, delivering high-quality workmanship that lasts. Based out of Gloucester, we proudly serve residential and commercial clients across Gloucestershire and the surrounding regions. Whether you want to boost your property’s kerb appeal, create a stunning outdoor living space, or start a major home expansion, we handle the job from the ground up. We pride ourselves on clear communication, punctuality, and a tidy workspace. No cutting corners, no hidden fees—just premium results backed by skilled craftsmanship. Our Core Services: Driveways: Stunning block paving, resin, or gravel solutions built to withstand heavy use. Patios: Beautiful, durable stone and porcelain patios perfect for outdoor dining and entertaining. Garden Renovations: Complete transformations, including turfing, artificial grass, and levelling. Fencing: Secure, stylish, and durable closeboard, panel, and decorative fencing installations. Brickwork & Retaining Walls: Structural walling, garden walls, and decorative brick features. Extensions & Groundworks: Foundations, drainage, and structural prep work for home extensions. And More: Complete site clearances, paths, and bespoke outdoor projects. Areas We Cover: We travel to projects within a 1-hour radius of our base, regularly working in: Gloucester & Cheltenham Stroud, Tewkesbury & Cirencester Worcester & Hereford North Bristol & South Gloucestershire Swindon & The Cotswolds Why Choose Us? Fully Insured & Qualified: Complete peace of mind for your home and property. End-to-End Service: From initial excavation and groundworks to the final finishing brick. Free, No-Obligation Quotes: Transparent pricing with a detailed breakdown of costs. Reliable & Local: A friendly, professional team dedicated to absolute customer satisfaction. No job is too big or too small. We work closely with you to bring your vision to life, on time and on budget.
Tom did an excellent job on the driveway including replacing the water pipe to the house which was not in the original spec but was required. Always kept me informed of what was being done and the timescale.
Specialists in Main roofs, flat epdm rubber, double glazing, canopies, conservatory roof tiles and insulation, rendering, and garage conversions
This company has proved excellent in all respects. Simon the first caller, went above and beyond the view to correctly diagnose the source of our problems and thereby left the competition in the shade. Ray the surveyor was next in the scene, very competent and helpful. The icing on the cake were Stuart and James the fitters who did an excellent job and were a pleasure to have here. Full marks!
GOLDEN CONSTRUCTION LIMITED OFFERING YOU THE BEST SOLUTION FOR ALL YOUR BUILDING NEEDS. We specialise in all aspects of building work from small repair work to large projects . 10 years of experience in carrying out renovations to make your house your home.
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A family run business based in Taunton, we pride ourselves on attention to detail yet provide a competitive, reliable & professional building service to our clients. We cover all aspects from minor home improvements to renovations and extensions.
Job very well done by Ben Adams! Very pleased with the final result! Would definitely recommend Ben’s services!
Neil Chamberlain Neil has over 30 years of experience in the construction industry, where he has gained a comprehensive level of knowledge and a thorough and in-depth understanding of most trades and skills. Neil commenced his career in construction as a sub-contractor building loft conversions, primarily in West London, and was awarded by The Federation of Master Builders for an exceptional conversion in Wimbledon. Neils recognised high standard of work has secured many diverse construction projects, including the substantial renovation of Period Houses, including listed buildings, single and double storey extensions, detached new build projects, an award winning Chelsea landscaping and garden design, as well as commercial buildings. Neil has worked as part of a team, as a main contractor and has also project managed all elements required in completing building projects large and small successfully. Property Service, (NPS) is a family owned and run business, bringing an extensive level of ability to benefit our clients projects. Whether you require property maintenance or are planning something more substantial our team will assess your requirements and put in place a tailored package for you, from an appropriately detailed quotation on smaller projects, to an all encompassing design and build service, including - planning, building control and a detailed costed schedule of works, we have the experience and background to meet your requirements.
Vamax LTD
House Extension
VAMAX LTD is a building company based in Bournemouth,we offer building services to commercial and residential customers.From small repairs to full scale projects. The services we provide include -New Build -Extentions -Garden walls -Garage conversions - Repointig -Landscaping and renovation works -RSJ installation
we are a small building company with over 30 years experience . our work covers extensions , loft and garage and cellar conversions plumbing and heating and u.p.v.c products.
Commissioned C and J developments. To build an attached garage. At the start of the project we talked through any issues as they arose and agreed how they would be rectified. However as build progresssed the quality of work deteriorated Brickwork bowed in side and rear walls. Joists for garage roof cut at different lengths and not cut to match the angle of the wall one joist packed out with old pieces of wood. Walls either side of rear door not aligned. Stopped work due to poor standard of workmanship
We are a family-run business established in 2018, with over 8 years of experience in the trade. Based in Blackburn, we provide a wide range of property and outdoor services for both residential and commercial customers. Our team is fully qualified in both gardening and landscaping as well as roofing, allowing us to offer a complete service across multiple trades. We cover all aspects of gardening and landscaping, roofing, tree work, patios, fencing, outdoor painting, jet washing, turf installation, rendering, and brickwork including wall building, repairs, repointing, and rebuilding. We take on all types of work, from smaller jobs and garden improvements to larger outdoor projects and ongoing maintenance.
NOT A QUALIFIED BUILDER! Promised to complete all work in 4 days. Arrived after 11am each day. Insisted on full payment or wouldn't complete work, so I paid in full. Pergola not installed. Waited another week, I asked to be refunded for unfinished work; he refused, I Kept his tools until refunded. He threatened to destroy my garden. I returned tools but no refund given. Poor-quality work. Didn't use whacker to level ground; it was very uneven. Had to remove grass to have it relayed correctly.
My company is Green Wave electrical LTD We do all kind of electrical work , and paint work. We give nice a quick job.
Grigo Build is a specialist building, extension and refurbishment company with over 13 years experience, working on projects of all sizes from initial consultation through to full project delivery. Working closely with our clients we are able to provide a fast, friendly and reliable service with a high quality finish at very competitive prices with an insurance backed guarantee. Based in Hendon NW London, we cover all areas in and around the M25. Our experienced team provides full construction, plumbing and electrical services and pride ourselves on client satisfaction. Please call to discuss your requirement - big or small!
Amazing builder! Super reliable, I’m happy with them all the way through. High quality standard, and super fast work. Whatever you want, they will listen and make it with no fuss. Recommend to anyone who needs to renovate a bathroom or do any tiling job. Can’t wait to have you guys here again to do more renovation. Thank you!!
A young vibrant and energetic business, quality and design at the forefront of our values. From light switch to new build we embark on all manner of projects from traditional stone listed buildings right up to the most modern you can imagine.
Very satisfied with work,would highly recommend
I started my company IJM in 1987, and with over 40 years of experience covering every aspect of the build industry, we can provide you with a complete service tailored to your exact requirements, from repairing a damaged fence to building new houses.
Ian and his team did a really fantastic job with our loft conversion. We now have an extra bedroom, study and bathroom. They are professional, knowledgeable and efficient. I’d absolutely recommend Ian to anyone, and we will be looking to use him again for other projects in the future.
J.K.ModernBuild
House Extension
Hi, my name is Jamie. my company is J.K.ModernBuild, I have many years of experience in the building trade and can offer advice on the job you need to be undertaken. we undertake many trades and furnish to a very high standard and professionalism -extensions -groundwork -landscaping -plastering & rendering -bathroom & kitchen fittings -soffits, fascias & guttering we take pride in our name and work, contact me and I would be happy to help and answer any questions you may have.
As an experienced building contractor who specialises in providing the very highest quality building services in and around the Kent area. We expertly handle every aspect of your project, right from the design and planning stage all the way through to the completion of the work. Keeping clients happy is one of our core values and you will get this from all of our extensive testimonials. Kent Building Company has a reputation for completing projects on schedule and within an agreed budget to the highest standards possible. Our specialist services cover most if not all of the disciplines within the building industry. We carry out all of our work using quality people with quality materials, our team of hand-picked tradesmen are tried and trusted tradespeople who are fully qualified in their respective disciplines. The materials that we use are selected based on long-lasting value and budget from major trade suppliers.
It is nice to be quoted a fixed price per square metre. Lee works to a high standard and worked at the weekend to get the job done. I will definitely use Luxor Services again.
Hi i have made a mistake on the add it sounds like i have written myself in as a maintenance man, I'm in fact a general builder and looking for house extension's in and around bristol thanks .
Excellent work. Hired him to replace wooden decking in garden he did an excellent job and then rebuilt the roof on an outbuilding repaired a wall and fitted a new garden gate. Very versatile, polite and punctual. reasonable rates as well.
Both Andrew, Steve and kyle have been in partnership over 2yrs and both have over 25 yrs building experience. we specialize in complete house renovations and have great pride on our quality of workmanship
We had water damage to our bedroom ceiling and down stairs wall. Kyle came out and sorted the problem. From start to finish Kyle was absolutely incredible nothing was too much trouble he offered friendly advice and gave an explanation as to everything he did. I can’t recommend him enough the work he has done is top notch.
Fully qualified carpenter, I’ve got over 30 years experience in fitting kitchens and bathrooms, I also do floor and wall tiling, aswell as many other property maintenance work.
Once again Phil has carried out brilliant work on my property. Thank you Phil for all your hard work. It is much appreciated Have a great Christmas Kind regards. Patricia Nurse
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