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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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Hi My name is Conor and i am a member of the chartered institute of builders which is the highest accolade achievable within the industry, I also have an nvq 6 in construction which is the equivalent to a masters degree. We are a well established company since 1999 and have a vast experience in painting and decorating, kitchen fitting, bathroom fitting and building refurbishment, roofing, listed building refurbishment, reactive maintenance loft conversions and extensions. We guarantee you the utmost service as can be verified by our previous clients testimonials We offer a one point of call for all trades for domestic and commercial customers .We previously completed painting/decorating , kitchen fitting , bathroom fitting and refurbishment works to listed buildings, schools, Universities ,hotels, restaurants , pubs, Hospitals, shops, nursing homes along with many prestigious new builds, bcp contracts and private works. We provide a 1 point of contact, complete service with all our other trades if required. Resulting in the client only having to deal with one person, who project manages the team throughout the course of the works. We also provide a kitchen/bathroom fitting service ,and a reactive maintenance package for landlords and commercial customers and have a vast portfolio having completed over 500 projects.
Emerald Builders removed old carport roof & replaced with new. Courteous & competent staff, left tidy site & did a grand job extending the life of the car port, thank you.
M&V Interior/Exterior Design Ltd
House Extension
We are a family company business profiled in interior and exterior housework including: Painting /decorating Flooring(tilling,laminating floors,) Any interior design and plan projected. Prices are very reasonable and affordable they can also be negotiated. The preferences of our customers are also taken in to consideration, we can also use our own materials to get the job done or use your own.
Welcome to AWARDED BUILDING SERVICES we are here to help you look after your home. Building and home improvement its about helping you to make your home a better place to live, and more valuable if u decide to sell up one day. We are specialist with 5 star ratings, we all so a member of the trust mark,
We’re so happy we went with Awarded Builder for our new bathroom. Heron was professional, friendly and really easy to deal with. His work was to an excellent standard and he does a lot of trades! Plastering, tiling, painting and plumbing - all done really well. The overall effect was great, his attention to detail really shows. Heron even helped me out with fitting a mirror cabinet in another bathroom. Really appreciated his help there! Would highly recommend Awarded Builder!
Hi I’m a plastering contractor in stockport, I do all aspects plastering work to new builds board and skimming, krend, damp proofing to domestic reskimming etc. Everything gets done to a high standard. Perfection is only just good enough
Joe and his team were very friendly and professional. Joe himself oversaw his team and made sure he kept up his end and was tidy along the way. Can’t recommend enough. He also facilitated extra work that was not initially agreed and still kept a very timing on the additional work.
DBCKG LTD
House Extension
At DBCKG, our goal is to not only help you design and build We are a full-service design/build company with a wide range of experience. We can help you with all phases of new home construction or remodeling: finding/procuring suitable land, architecture and design, building your home and landscaping your yard. Our excellent reputation and long list of satisfied clients attest to our superior. craftsmanship, attention to detail, clear communication, honesty and integrity. Just ask for our client reference list. we will give you 5 yaers guarantee for all major job.
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JD Building is a well established building company operating in Bath,Bristol and surrounding area's.We have nearly 30 years of experience within the Building industry offering competitive rates and fixed programme of works completed on time.
Excellent service, good team of workmen who took care over the job with close attention to detail.
We are a family run business with over 10 years experience in the building trade, we are very trust worthy and reliable always accomadating the customers needs. We specialise in all trade s from plumbing, electrical, carpentry ,full renovation s etc to pa
Welcome to D Grand Homes Ltd, a beacon of excellence in construction and home transformations with a legacy spanning over 14 years. Our skilled team prides itself on being respectful, polite, highly professional, efficient, and consistently meeting deadlines. We specialize in a wide array of services, including extensions, loft conversions, new builds, and comprehensive refurbishments. At D Grand Homes Ltd, we are committed to delivering a first-class finish to every project, showcasing a meticulous attention to detail that sets us apart. Whether you are envisioning a new living space, enhancing existing areas, or embarking on a full refurbishment, our team has the expertise to turn your vision into reality. What distinguishes us is not only our commitment to quality but also the scale of our capabilities. Our team, comprising up to 20 skilled professionals, is complemented by a network of reliable subcontractors specializing in plastering, landscaping, bricklaying, electricians, and more. This collaborative effort ensures that every aspect of your project is handled by experts in their respective fields, guaranteeing a seamless and top-tier outcome. Choose D Grand Homes Ltd for a transformative experience marked by skill, professionalism, and an unwavering commitment to excellence. Whether you're planning an extension, loft conversion, new build, or a comprehensive refurbishment, our team is ready to exceed your expectations.
Daniel provided a competitive quote. I wanted Howdens kitchen and he allowed me to directly deal with Howdens. So in effect I paid the Howdens trader price. The best part was for him to suggest some additional work which made a lot difference. I really appreciate him for that. He charged extra but it was worth it. Daniel and Team worked very professionally and finished the work as agreed. The most important is that Daniel is a good man. I will definitely call him for future work. Highly recommed
Kosta64 LTD is building company we do extension , fully refurbished and roof replacement,painting and interior work!
This job was to temporarily provide us with a shower over the bath - Konstantin explained a way of doing the and once we had ordered the bits required he came back and did the job. The job was done exactly as he explained for the exact price he quoted. Thank you very much.
CW Fencing & Landscaping
House Extension
We are Hampshire/surrey based landscaping professionals with over 10 years experience in the trade. We cover all aspects of landscaping. We pride ourselves with quality work at a competitive price. No job is too big or too small. Our services include - Fencing Turfing Paving Brickwork Artificial grass Driveways Repointing Garden maintenance
TMC Roofing and Building LTD
House Extension
We are a family run business which cares for our customers needs we do all building services inside and outside of properties
Warner Builders are a family firm that have been offering Building services for three generation's. Based in North Broxtowe but cater for the whole of the East Midlands. We cover all aspects of Building. Brickwork Specialists, a clean and reliable service
Great work on boundary wall and did a lot of work for the money including removing a larger than expected tree. Would highly recommend.
Botnari Construction
House Extension
Botnari Construction Every project is unique to every homeowner with small details having significant importance. What matters to our clients is what matters to us and these are the problems that we like to solve. We specialise in all Construction works with many years being in the industry, making sure we deliver a fast, efficient and well-organised project at its best.
EUSEBIO CONSTRUCTIONS LTD
House Extension
bathroom fitter , repairs , ceiling ,plastering , plumbing and more !!
We are a specialist Loft Conversion company with over 15 years experience. We offer a complete solution, design, planning and construction for your project. With references all over London you are welcome to view past projects. Call for a free quotation.
Had a very positive with Mark and the Unique Lofts team for our loft conversion. I would highly recommend them. Michael and Brad (our team) were friendly, dedicated and hardworking. Our neighbours, who had the skip chute cross their garden, also shared how considerate and friendly they were. Michael kept me in the loop, followed up on my enquiries and gave some really helpful advice in moving airing cupboards and opening up the loft space for more natural light. All in all, highly recommended.
A bricklayer with over 16 years experience in the industry, working on various projects from garden walls, new builds to large commercial projects.
We had Calum out to do e previously botched pointing job. The end results is fantastic. These guys worked away no hassle at all and even managed to squeeze in another small job they discovered. Very punctual and professional and no messing about. Highly recommend and would definitely hire them again if I needed a builder.
Fully qualified carpenter/joiner for over 25 years. DBS checked. Full public liability insurance held.
Mercer construction completed my job perfectly. Matt arrived on time, had already started the job before I arrived. Great job, cleared everything away after. Would definitely recommend. Very pleased customer.
Welcome to DB ARK With over 10 years of experience, we specialise in creating bathrooms, bespoke furniture and kitchens that combine style, functionality, and quality craftsmanship. Whether you’re looking for a modern kitchen upgrade or a luxurious bathroom transformation, we deliver tailored solutions to suit your needs and budget. Our services include: •Full bathrooms and kitchen renovations •Custom cabinetry and fittings •Tiling, flooring, and lighting installation •Plumbing work •Wet rooms and walk-in showers •Bespoke furniture •Carpentry work We pride ourselves on delivering high-quality finishes, attention to detail, and excellent customer service. Check out our portfolio and customer reviews to see how we’ve helped clients turn their vision into reality.
Hey Bridge Home Improvements
House Extension
We are a friendly building service with 20 years experience in the building and construction industry . We specialise in extensions , loft conversions , garage conversions and much more . We have a very keen eye for detail and aim to deliver jobs in very good time and to the highest spec . All works undertaken will come with a full written works agreement and all completed works will come with a full written guarantee upon completion of works . All tradesman that work for HEYBRIDGE home improvements are all full qualified to NVQ level 3 in their respective fields . Thank you for reading and we look forward to hearing from you
CBS
House Extension
At Chiossone Building Services we provide a wide range of services within the construction industry. With 7+ years in the building industry, CBS have the skills required to provide a stress free high standard of work. From completely renovating your garden/home, to making a simple change within your household, we will approach the job professionally and strive to make you happy with the end result. Thank you for taking the time to read my profile, looking forward to building my profile and reputation! Please check my social media pages for the most up to date photos of my projects. Marco Chiossone
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