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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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With over 41 years' experience in creating high quality bespoke building projects, look no further than Turley Properties Ltd for all construction / Landscaping services for your property. * Call Us Now For A Free Quote
I’ve set up my company in January 2013 with a selection of skilled tradesmen to carry out any job requirements from big to small like: -Loft Conversions -House Extensions -Full Refurbishments -Garage Conversions -Porches and Driveways -Complete Heating Systems -Kitchens and Bathrooms Refurbishments -Plastering,Tiling,Flooring,Painting,Electric
The team is very polite and efficient, did a good job and cleaned up after. Recommended.
Alpha Miggs Enterprises
House Extension
At Alpha migss enterprises, we take pride in being specialists in construction and intricate finishes, transforming interiors into stunning masterpieces that combine beauty, functionality, and durability. With years of experience and a dedicated team of highly skilled professionals, we are committed to delivering exceptional craftsmanship that exceeds expectations every step of the way. Our expertise lies in attention to detail and the ability to execute even the most complex designs with precision. Whether it’s luxury homes, high-end commercial spaces, or major renovations, we approach every project with a tailored solution to suit your specific needs and aspirations. We work closely with our architects, structural engineers, and most importantly our clients to bring unique visions to life, ensuring that every element is crafted to perfection. We excel in using premium materials and advanced finish products. Our commitment to innovation and excellence ensures that every project reflects both timeless elegance and modern functionality. What sets us apart is not only our technical expertise but also our passion for creating interiors that inspire and delight. We understand that your space is a reflection of who you are, and we go above and beyond to make it exceptional. Every detail matters to us, and we ensure that the final result is nothing short of extraordinary. At Alpha migss , our mission is to transform spaces into works of art that stand the test of time. Trust us to handle your next project with care, precision, and an unwavering commitment to quality. Let us turn your vision into reality.
Established in 2002 as a sole trader, I have developed a number of properties ranging from barn conversions to new build apartments. I have also project managed a number of bespoke new builds and conversions for high profile clients. All trades available!
Fantastic service from start to finish. Would certainly recommend. Has every trade available and the job went smooth.
We are a family run and owned Joinery based company of 20 years .All types of Joinery 1st & 2nd fix ,Doors ,flooring. Kitchens ,Commercial ,Shop fit out Media Walls , Wall Panelling ,Decking , Garden Rooms , Fencing, We also cater for new builds extensions and general building work A 5 Star Rated Company
Excellent service from Lee's team - quickly quoted for job - turned up as agreed and finished the job on time - I would highly recommend this company for anything you need to know about fire doors! Thankyou!
ABLE HOLDINGS LIMITED
House Extension
Able flooring and renovations have been operating in the south east coast since 2020. We are covered with up to 5 million PLI and 1 million LI. Read our reviews on google / Checkatrade / TrustATrader for a review on just some of our works we have carried out. We work both residential and commercial sectors.
I am builder I have been working from last 9 years in this building industry And trying to provide quality work to british standard I can do any kind of building job If you need my any help Feel free to contact me
Feras Awayed Painters
House Extension
Work is a trust, and whoever among you does work, let him do it well. My work is what proves my skill.
JCP Building Contractors are a reliable and experienced building company providing a wide range of building and construction services across Farnborough and the surrounding areas. We work with both domestic and commercial clients, delivering high-quality workmanship on projects of all sizes. Specialising in extensions, groundwork and structural works, our skilled team also undertakes brickwork, bricklaying and landscaping services, ensuring a complete, end-to-end solution for your project. From initial preparation and foundations through to the finished build, we manage every stage with care, professionalism and attention to detail. Whether you are planning a home extension, require structural groundwork, or need expert brickwork completed to a high standard, JCP Building Contractors are committed to delivering resultsj you can rely on. We pride ourselves on a friendly, honest approach and believe that no job is too big or too small.
With over 15 years building experience in the construction industry, GN Building Services (Stafford) Ltd are experts in all aspects of construction and project management. We specialise in both traditional and cutting-edge design and building methods. GN Building Services (Stafford) Ltd is not only a building company. We cover the entire project, from planning, design, building, renovating, electrical installation, tiling, and plumbing. We do not use subcontractors; all work is completed by our own employees. This means no delays, no waiting for specialist tradesmen; we finish the entire job within budget and on time.
If you want building work done then GN Building Services are brilliant, not just excellent!. Before we said to go ahead he had introduced us to four former clients and showed us the work completed. He and his team are probably the hardest working tradesmen I have ever come across and talk about working to time and budget. I should really keep this review quiet as they are very much in demand and I need some more work doing - but I can not rate them highly enough.
BA provide a very friendly, helpful and knowledgeable service. We excel in helping with design and thinking outside the box.
Simple job turned out to be not so simple. Turned up exactly when he said he would, did a good job, including taking on the extra degree of difficulty we had not foreseen. Job ran over from the single day expected, and returned the next day to finish off. Polite, efficient, punctual, and stuck to the price agreed.
Our vision at Customex Build & Electrical is to deliver innovative thinking and a first class service in all we do in support of our customers. We will endeavour to be the very best we can be, whilst acting with integrity, professionalism and honesty and operating in the best interests of our customers and the environment at all times. All our team are qualified to the highest of standards providing the best service and workmanship. Weather its a small cupboard to be built or a double story extension, with 30 years + of experience combined you can be sure you can rely on us!
Local small business offering multi trades. All pictures are of jobs undertaken by myself. Kitchens, bathrooms, plumbing, plastering, tiling, decorating and carpentry. High quality workmanship carried out by a reliable conscientious tradesman.
Quoted but just too expensive
RATED PEOPLE LIMITED
House Extension
Skilled groundworker with over 25 years of varied experience, including block paving and drainage work.
I would recommend Andy. He spent time evaluating the job required with a view to looking at less costly but effective options. Most of the time I was out at work, he called everyday when he was leaving to update me on progress. He communicated clearly and so there was no confusion with what the job involved and the final cost. He was also very nice to my dog. Thanks Andy.
Family run fabrication and welding business and construction company offering all types of manufacturing and installation that works closely with our clients our aim is to provide fabrication and welding solutions also building construction with honesty and quality also help to complete project on time
What an amazing job John did. He is a very talented ironworker . Our gate looks like it was made for our house . Would highly recommend .
At CLG Projects we offer a range of services and specialise in Construction, Hard/Soft Landscaping and Groundwork. We take pride in combining our experience and passion for our work with our client communication to help achieve their vision and make the duration of their project as affordable and stress free as possible. We keep customer satisfaction as one of our top priorities as we believe that good working relationships are key to a successful project. Based in Essex, serving Essex and the Surrounding areas. Services we provide Construction Landscaping Groundwork Refurbishment Garden Rooms/summerhouses Conversions Driveways Fencing Pergolas Drainage Why work with us - Professional workmanship - Friendly service - 10+ years experience - Complete building and landscaping package - Fully insured - Free, no obligation quotations
Not the cheapest but also not the most expensive. Very friendly. Sent a detailed quote ahead of time. Turned up when he said he would and everything was very well organised and efficient. Very happy with the quality of the work and the job as a whole. Highly recommended.
At Sabr construction We Provide customers with the best quality of work for affordable prices.
Nice work, many thanks Omar
Over 15 years in trade Fully qualified gold ECS CARD Managers black card ESC CARD Very honest and reasonable prices
We are a midlands based building company who specialise in renovations, extensions and upgrades to your property. We also carry out all general repairs. We have many year’s experience with time served tradesmen who are fully qualified in all aspects of work required for your project, and we carry out all projects with our own in house team members.
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