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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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Excellent communication from initially enquiring about the job to making sure what could be achieved. Kem arrived on time, understood the job, and completed my joinery in a professional and diligent manner. Meticulous attention to detail made the task efficient and to a very high standard and on time.
CARING FOR CLAIMS Aspray (Sutton Coldfield) provide a property damage claims management service, helping policyholders who have suffered damage to their property and need to make a claim on their insurance policy. We've helped previous customers with fire, flood, storm, accidental damage, impact damage and various other insured events that have caused damage to their property. There is no charge to you, the policyholder, for the Aspray service provided that you authorise us to use our own vetted sub-contractors to complete any repairs or reinstatement works. Any excess stated within your insurance policy will still apply. Aspray (Sutton Coldfield) look forward to helping you. Aspray is authorised and regulated by the FCA for claims handling only.
Very professional and extremely knowledgeable
Please check our Checkatrade reviews! This is a new account. Ellis Roofing and Building Ltd based on the Wirral. Covering Wirral and surrounding areas. Our goal is to exceed the expectations of every one of our customers offering a wide range of building, joinery, bricklaying and roofing. We have a vast knowledge and experience to provide our customers with outstanding results for any of their construction needs. Our prices are competitive and we offer great customer service.
The job was posted on 22nd July 2025 and Wade Ellis of Ellis Roofing And Building Ltd responded 2 days later. After a survey, I received a quote on 26th July, which was accepted. A skip arrived on 29th July and the work commenced next day. The job was completed on 1st August. The bricklayer and his female trainee assistant got on with the job without any fuss, and they were very pleasant to deal with. The aim of the project has been delivered and I am very happy with the result. I recommend them. 5 stars!
Quality,reliable, friendly local General builder. No job too big or small. Happy to travel. Free quotes. Twenty years experience. All types of work undertaken.Bathrooms/showers.Decking. Garage conversions/.extensions. Stud partition work.References.
Mark was great. Hardworking. High quality. Friendly.
Trading as intrendbuilders and tesscon co uk search us on google We are a friendly, hard working & affordable company who specialise in All forms of roofing and general building, maintenance, fencing and landscaping, waste removal, end of tenancy property clearances, wooden & laminate flooring and more in all areas of Birmingham & surrounding areas.
kindly send me your contact details for more info about the contract oppurtunity
At TS Property Maintenance LTD we provide comprehensive home maintenance solutions to keep your property in prime condition. Our team of skilled professionals are dedicated to deliver top-notch services that ensure the comfort, safety, and functionality of your home. Whether you need routine maintenance or specialised repairs, we’ve got you covered. www.sthomemaintenance.com Insta- sthomemaintenance
Very professional work, and to a high standard. Very polite and extremely pleased with the work. I would highly recommend this gentleman
Iqbal Construction is a building company based in Birmingham with over 10 years of experience in the Construction industry, We carry out all aspects of Domestic/Commercial building works across the West Midlands to the highest standards. Services include plumbing, carpentry, brickwork, loft conversions, extensions, house renovations, painting/decorating, plastering and all other general building works.
Very pleasant guy, responded quickly and worked really fast. Explained what he had done and why. No mess or messing about. Likely to get more work from us in future.
Bayhaven is a family building team of three. We specialise in house builds, barn conversions, extensions and renovations. We don't use subcontractors and maintain 100% attendance until job completion. We pride ourselves on the quality of our work.
This review is way overdue. Kev, Mick and Dave did a fantastic job of our kitchen extension and garden landscaping. Has really transformed our home. We can not recommend them enough, Kev pointed us in the right direction the whole way through even making suggestions which saved us thousands. He reused materials, which also saved us more money and pulled out all the stops to ensure we had a working kitchen in time for lockdown.
We have been established in the building and maintenance trade for 10 years and have a excellent worker/customer relationships, we offer all aspects of the building trade and garden maintenance/landscaping. We offer domestic building works, home improvements, all types of flooring, and landscape services. We offer competitive rates and with excellent working standards, no job too small. Contact us for a free quote. Thanks
Very happy with the LVT flooring that was laid for us. Would highly recommend and won't hesitate in using them again for future jobs. Thank you!
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Hi welcome to first choice property services Hee at first choice property services we have 20+ members to sort ur needs Chimney repair and installation? Roof repair/cleaning/pressure wash? Repointing? Pressure wash walls drives roof etc? Gutter repair and installation? Step repair and installation? Patio/block pavement repair and installation ? Fencing repair and installation? All gardening services? Tree removals? No job too small don't hesitate to give first choice property services a call or text.
After a week or so of back and forth as they kept cancelling, they sent 2 young lads who had 0 to little experience. Most of the work will need redone. They created alot of mess and had to use my ladders for some of the work which was not very professional and took 2 days for a few hrs of work as they couldn't do it. Their manager was very apologetic but still charged £500 for the "work" Terrible experience.
For 30 years ran a team restoring and refurbishing 100k to 1 Million contracts . Problem solving, Supervising other trades. I have now decided its time to slow down and be more hands on once again. My knowledge of the building trade is comprehensive.
Couldn't recommend more. Kept me updated throughout the whole process, the work looks fantastic. Cleaned up after and very polite and easy to deal with! Not a number I'll delete from my phone
Introducing C&P General Construction, a renowned general building company led by the esteemed general manager and main builder, Alex. With a stellar reputation backed by positive customer feedback, C&P General Construction excels in a wide range of construction projects, from small-scale ventures to high-end projects, including new builds, extensions, and lofts. Their expertise extends beyond standard construction to encompass high-end refurbishments, where they excel in delivering fine touches such as Italian painting and Venetian plaster. What sets C&P General Construction apart is their commitment to providing the best value for money. Their team of trustworthy builders ensures that every project is executed with utmost professionalism and precision, exceeding client expectations. Regardless of the scale or complexity of the project, C&P General Construction is dedicated to delivering exceptional results, making them the ideal choice for your construction needs.
Alex and his coworker from C&P General Construction Ltd did an exceptional job repairing and repainting my front door, 7 door frames and most of the skirting boards around my flat. They both are very friendly and are very good at being neat and paying close attention to detail. Alex offered a reasonable price and made sure they both took their time so it was done to a very high standard and to my satisfaction. I felt even more confident when Alex shared his professional advice throughout. Thank you Alex! ????
Erjo's Home Improvements
House Extension
Founded on a legacy of craftmanship and dedication, Erjo's Home Improvements brings over 13 years experience to every project. Our expertise in roofing, home extensions, bathroom and kitchen renovations, and more, stems from a trade learned and perfected by our founder alongside his father. As a family business, we value the traditions of quality and integrity that have been passed down through generations. Our skilled team of four is united by a passion for delivering exceptional customer service, and transforming homes with precision and care. At Erjo's Home Improvements we treat your home as if it were our own, ensuring each project reflects our commitment to excellence and the personal touch that defines our family heritage.
Marche Construction LTD
House Extension
Father and Son company, after 35 years living and owning a construction company in Italy we have moved here in Manchester to get bigger opportunities. We do Extension, Tiles, plastering and fencing. Working on all the aspect of constructions. Here to be unique in our work
Multi trades solutions for commercial and residential projects. We cover a wide range of trades: carpentry 1st & 2de fix, bespoke joinery, tilling partitioning, cladding and louvre systems. Always offering services in home repairs, maintenance and new additions. What ever your project small or large we offer expert and cost effective solution. CSCS carded so available for work on sites.
A very friendly and helpful person and hard working person .. came on time was very piloted and did excellent work did exactly what I asked him to do... Very reasonable price... would definitely recommend and will call him again for my further jobs.. I am a happy and satisfied customers
If you need a specialist here we are. We have expertise in general building, extensions, conversions and refurbishments at affordable prices and high quality.
Excelect job and clean all the way. GCO International got a super professional and quick team. My house is an old house 1930 and they had to go back to brick. In just 6 weeks now I can move in a brand new home. They install new electric wiring, plumbing, plastering, everything, with a team of just 4 builders. ( Garage was converted in only 2 weeks from startto finish, ) Price was resonable and nevergotan issue with them durring the building process. I recommend them and will use them again for my extension
M&M CONSTRUCTION (LONDON) LTD are an professional construction and refurbishment company with 13 years of experience in construction industry . We are building contractor specialising in solutions for your home restoration, kitchen and bathroom refurbishment, extensions, loft conversion and internal remodeling. We are working around North West and Central London. We have 13 years of experience on London's construction industry. We offer professional services: Bathrooms from A to Z Kitchens from A to Z Plumbing work Electrical work Painting and decorating Wallpaper Carpentry work Tiling Cleaning service Construction work Loft roofs of any kind Wood floors Extensions Fencing & Gates Paving & Slabs Book an appointment at a time to suit you and we will look at your refurbishment requirement and provide a free no obligation quotation
Hello, My name is Justin, we run a Construction & Carpentry company based in Castle Cary Somerset. We have been established now 20 years. We are a member of the Federation of Master Builders and Trust marked. who have inspected the quality of our work. We are also a registered Company to undertake room in roof work/ insulation under the government Green home grant scheme. We are competitive and reliable and look forward to hearing from you. Justin. JA Construction & Carpentry Ltd.
I was really happy with the work completed on our decking. They were friendly and professional. I would definitely recommend.
At TORA-Renovations, we pride ourselves on being more than just a construction company. We are visionaries, dedicated to transforming your spaces with passion and precision. Our expert team collaborates with you at every step, ensuring transparency and a shared commitment to excellence. Together, we create refreshing spaces that resonate with your lifestyle and dreams. With over 15 years of experience in building, construction, carpentry, and renovations, Tora Renovations is your one-stop shop for all your building needs. We handle projects from architectural planning to a fully completed finish, offering comprehensive services that include electrical work, plumbing, and decorative solutions. Our skilled team ensures precision, quality craftsmanship, and a seamless experience from start to finish, turning your vision into reality.
Tomasz from Tora Renovations completed my job hanging and renovating doors in my tenement flat. He performed a first class job, was punctilious and tidy. I would have hesitation in recommending him.
DUMICON LTD
House Extension
Construction company with main builder having over 16 years experience in the trades. Good prices and great quality work is ensured when we finish projects and all types of insurance certificates for this company are available on request.
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