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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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Wolverhampton based building company offering building & renovation services. We specialise in extensions, garage conversions and complete house renovations. All quotes are offered free of charge without obligation. Quotes can be undertaken on an evening or at a weekend at your convenience. We can also arrange architectural services, structural engineer calculations and building notices. All works completed come with a 10 year workmanship guarantee and we can also arrange for all works to come with an insurance backed warranty.
Things with our extension started off well & both brothers could not do enough for us. They helped with the cost of bifold instead of french doors. However, when we were unhappy with a lack of workers they became very obstructive. They use good contractors but do not pay them & they refuse to turn up! A 15 week job took 45 weeks. We have had two leaks from the roof & we are still waiting for the 2nd to be fixed, with no reply as yet!
Hi I’m Paul I set up KAL Building Solutions Ltd after successfully working as site manager working on refurbishments for some of the biggest names including Brewdog, Revolution Bars and Ask Italian to name a few where timescales were tight but always kept to budget and time. Prior to this I worked on the domestic sector ranging from refurbishments to structural works. We have invested a lot in quality tools which makes our job easier and helps to do the job more effectively.
Paul did a great job and kept us informed throughout. Very happy with the level of work done. Would highly recommend.
We are a strong team of skilled tradesmen with over 25 years of experience. We like to work closely with our clients to make sure that we meet and exceed your expectations. We have worked on a number of home renovations and new build projects so have expertise in every area. We know how important it is to pick a company that is experienced, dependable and affordable, so we have a clear communication policy which keeps our clients updated on the progress of the job at every stage. Let us know what you want and your budget, and we’ll do our best to make it happen.
Here at midland construction we are a family run buisness with 35 years experience in the building trade we specialise in exstensions patios orangerys and all kinds of building work undertaken we don’t employ salesman
Would highly recommend Midland Construction. From the initial consultation to completion everything has been excellent. Was completed on time and to budget. All contractors have been professional and polite. All cleared up at the end ofthe day. Any problems have been sorted quickly and efficiently. Would definitely use again
We are a building firm who prides themselves in all exterior and interior works- we have a fantastic range of trades and take on any major projects ! The range of works vary from; -Conversions , -All joinery works, -Man caves, Extensions -Feature walls, -Bathrooms, -High end refurbs, -All round building works... and much more! I have a high range of tradesman to hand including . Electrician Plumber Plasterer Painter Tiler Bricklayer Joiners We don’t do problems we only do Solutiions
Absolute 1st class service and build from Michael and his team. Communication was great from our first contact right through to completion. Excellent competitive pricing and good invoicing. The overall build quality of our extension is fantastic and thoughtfully done. We had a downstairs shower room, dining room and hall added with new back steps. Michael is a great problem solver too. Would definitely use again and highly recommended to anyone looking to have any sort of build project taken on.
started business as parternership in 2007, we grown our portfolio from 2 houses to 86 units today, we also helped over 100 homeowners and 25 landlords including housing association, we help from a full consultancy package to build yur dreams to even help with leasing to our corporate contacts if you wish to invest. featured on HOMES UNDER THE HAMMER, we pride our selves in job well done, we always make sure we start projects within 2 to 3 weeks from time we agree and we always deliver our projects on time; we make the impossible a luxury and affordable possible while we take all the stress away; BGH combines technical expertise with exceptional customer service, ensuring every client benefits from cutting-edge technologies tailored to their home needs. with industry leading certifications and proven track record, BGH is a top choice for those seeking efficient, reliable and successful renovations We ate fully accredited Offer full guarantees and insurances including insurance backed guarantee and deposit guarantee We are specialist in new build, extensions, heavy refurbs, hmo and luxury conversions
Weardale Construction have been in business for over 16 years. Our main works include extensions, loft conversions, sun rooms and conservatories, We are a team of 8 covering all services without the need to sub contract out any works
So pleased with the work completed by Dave and his team. We hired them to build a single storey extension and couldn’t be happier with the result. Everything went smoothly with all work completed earlier than planned. All of the building work was completed to an exceptionally high standard, all without any issue or stress. Reliable, professional, a pleasure to work with.
L. D. E Construction Services Ltd Bricklayer / general builder Extensions Garden walls Re-pointing Patios Drive ways Fencing Decking Astro turf Rendering / pebble dash walls Tiling Custom hand made wooden gates
The porch Lawrence built for us is a perfect addition to the front of our bungalow.In particular his brick laying and attention to detail and tidiness were exemplary.
Here at A1 B&G we have over 40 years of experience on the tools covering all aspects of Building, groundwork and landscaping. from footing and foundations to patios and driveways we have the skills necessary to complete your project clean, safe, in good time with affordable rates. 100% customer satisfaction guaranteed.
Excellent workmanship, very reasonable, great workers! would thoroughly recommend
We are Diamond Construction Services Ltd. We are Construction business based in the Bristol and Bath area. We pride ourselves on being extremely professional from the initial site survey all the way to the completion of the project, we always complete projects on time and in budget. Our team consists of Bricklayers, Carpenters, Electricians, Plumbers and General Builders who collectively have years of experience in the construction industry, ensuring that we provide an extremely professional service from the start to the end of the job. At Diamond Construction Services Ltd we provide a free design and quotation service, this means that If we are invited to provide you a quotation our estimator would attend your premises at a time convenience to yourself where we then would talk through the work which you would like doing, discuss the most practical and affordable way in which we can complete the job and then provide you with a full detailed written quotation, stating the exact works in which we’ve agreed on and a broken down scope of works on how we propose to complete the project for you with estimated dates Also attached is a fixed price along with a proposed payment plan, we like to work on a pay as you see basis meaning we never ask for an invoice to be paid until you see the work completed, as an example once the footings have been excavated we would then send across our invoice for footings excavated. Thank you for taking the time to read this description and please do not hesitate to contact us to discuss any of the above.
Dan and his team have been amazing, going above and beyond Thanks so much
MHP offers a wide range of Building &Joinery work from new build , Extensions , conversions , to full refurbishments including bathrooms and Kitchens . Our Tradesmen have many years experience in all aspects of building work to cater for your every need . Give us a try for a no obligation Quotation
Fantastic communication. Completed the works within a day of providing a quote. Would highly recommend.
Let us Make your Dream House a Home! Construction company built by experts in the trade with over 30 years of experience EFM Property is a commercial and domestic construction company providing services to clients across the South West. We are a very diverse range of individuals who are willing to get their hands dirty working to satisfy all our previous, existing and future customers. High quality of work and focus on customers satisfaction and safety is our key priority. Our Services Include: - Commercial Construction - Domestic Construction: from planning and drawing stage to execution New Builds Extensions Refurbishment Paving
High quality work from a friendly team
All aspects of building work. Providing Professional quality building service.
With over 20 years experience in all building aspects. We cover everything from the small tedious jobs to large extensions and builds. Family oriented company with great understanding to what customers needs are. Plymouth and surrounding areas covered.
Very pleased with APEX, doing a great job, near to completion, very glad I brought them here to sort my unfinished kitchen and bathroom extension. Family business, I can't recommend them enough. They've taken on my ideas, and carried them out great, I certainly would recommend them to everyone.
About Strawberry Construction Ltd With over 20 years of experience, Strawberry Construction Ltd specializes in bringing your home improvement ideas to life, from concept to completion. We offer a full range of services, including extensions, house renovations, garage conversions, and loft conversions, ensuring quality craftsmanship at every stage. In addition to construction, we provide bespoke kitchen and bathroom designs, tailored to suit your style and needs. To help you visualize your project, we also assist with architectural planning, design stages, and 3D virtual models, allowing you to refine and perfect your ideal home concept before work begins. At Strawberry Construction Ltd, we are committed to delivering excellence, transforming spaces, and creating homes that inspire.
Didn’t end up using them but initial meeting and planning was excellent.
We are a family run business with over 25 yrs experience.We build on our reputation for quality reliable work at a sensible price.All works are garanteed get in touch today for a free no obligation estimate
Foxtons Frames are a family business based in Kent. *** UPDATE We now supply and fit GARDEN ROOMS, for a completely independent home office / gym / annex to your property. *** We are experts in the installation of windows, doors & replacement roof systems. We also design & build bespoke conservatory's, Orangery's & build high quality single story extensions for our clients. Foxtons offer a Free design & consultation service and can advise clients with regards to planning & Building control matters. Foxtons offer high quality PVC & Aluminum frames and also offer a wide range of New technology tinted, self cleaning roof glass. Why choose us? 1. Over 30 years’ experience within the Home Improvement market. At Foxton’s we believe customer satisfaction & attention to detail is imperative. 2. We offer a first class service & take pride in completing our client’s projects in a timely & organised fashion. A personal service is always given by the Foxton’s team. 3. Foxton’s clients receive a 10-Year insurance backed guarantee as standard via the Independent Warranty Association.
Highly professional and knowledgeable. Everything explained and all our queries dealt with. Following home visit by Nick and Kirsten quote and Cad drawings followed quickly and our design changes dealt with . We are excited and looking forward to the completion of our extension. We have great confidence in Foxton Frames .
Hello, my name is Bill from bill kent building &roofing ltd. Here at bill Kent building and roofing,we offer exceptional loft conversions and extensions to transform your living space and bring your interior vision to reality. Based in Essex, we also offer our services to the London and Hertfordshire area. We have over 20years’ hands on experience in the building industry, taking pride in all our work and putting customers at the heart of our business. We can assist you with a design to build project or if you have already had plans/ drawings done we can take over from there. We also offer other services such a roofing maintenance and landscaping. Look forward to hearing from you from us all at bill Kent building & roofing.
Really happy with our new extension. Everyone that worked on it was friendly and professional. The work is at a really high standard and definitely going to be using them again for our patio next. Thanks so much
James Building & Roofing Cambs offer the complete professional construction services. We specialize in extensions, conversions, alterations & all aspects of pitched and flat roofing ,We are an reliable company with over 20 years’ experience in the building trade. Based in St. Ives, we cover the whole of Cambridgeshire. At James Building & Roofing cambs , we believe that your house is more than just bricks and mortar, it is your home. We pride ourselves that we can deliver reliable and personalised service to all our customers. We offer an extensive range of construction services. Our expert builders & roofers ensure all of our work is carried out to the very highest standards of quality and safety. If you would like to find out more, we also offer a free no obligation quotations to assess your individual requirements and will always treat your home with the utmost care and respect. If you are looking for Extensions Loft Conversions or any building work in the Cambridgeshire area, you can be sure that all our services are carried out carefully, efficiently and to an exceptionally high standard of quality. We are happy to undertake domestic/commercial work. At James Building& Roofing no job is too big or too small. All work undertaken is fully insured & guaranteed
Fantastic job! James Building and Roofing transformed my house demolishing my old porchand rebuildingit with a modern look plus relayingmy driveway. Very professional approach with an eye for detail. Constant communication and updated on where the project was and what is the next step. Did what we asked and where needed respectively put his input and suggested a better and more modern style. Highly recommend!
At Surrey Hills Extend & Renovate we promise Quality and Craftsmanship. We take pride in delivering superior quality in every detail of our work, ensuring long-lasting and visually appealing results. We have a Customer-Centric Approach and your satisfaction is our top priority. We work closely with you, understanding your needs and preferences, to create spaces that truly reflect your vision.
Very good and profesional
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