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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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Over 16 years experience carrying out extensions from the ground up to roofing, briclaying, plastering, rendering, painting and decorating and refurbishments. Our team prides itself on perfection and customer satisfaction.
James did a great job and I ended up combining two jobs we needed into one. Highly recommend
weardale construction have been in business for over 16 years our main works arte 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
Had a couple of communication issues, but resolved.
Hi ,I'm ludovic mate from LM PAVING BRICK WORK COMPANY and I have more than 20 years in construction industry such as ,brick work ,paving renderer building repair and many more ,I set up the company in 2017 and I'm still in the business
New to Rated people after 23 years in the industry. All aspects of building works. Large scale projects, all new data installation works commercially. Fully insured Full portfolio of works, live projects, Refurbishment works, full house renovations, right through to new builds and extensions. Free quotes and surveys In house design team.
Our bespoke building services ensures that you can get the exact kind of work you need and want. Whatever work you are looking for we can assist. From renovations to full build extensions, we can help. Our projects can be tailored to your exact needs and preferences, with all the services required provided. Our tradesmen lead by example, only ever working within the strictest of building principles. We only employ the highest quality builders and tradesmen to deliver your project on time and to the highest standards. Each one of our jobs is handled completely bespoke, suited to match each new client’s requirements. We provide a range of different building project types, from small and simple porches, to rear, side, front and wrap-around extensions, loft conversions to full kitchen extensions and renovations. We are a fully licensed and insured building company. We hold all the necessary licenses and certifications required to operate legally in the UK. Additionally, we carry comprehensive insurance coverage to protect our clients, team members, and projects. Our expert team can be there from the very beginning, helping you plan out your proposed works, before the building even starts.
Object Builders got in touch and we now have agreed terms for eork going forward.
We pride ourselves on being a friendly, family run business based in Derbyshire. With experience spanning 30 years, we can offer a comprehensive home improvement service. From a simple replacement glass unit through to an individually designed conservatory or extension, we can offer a service you can trust. If you love your home we can help you love it a bit more. We can also assist with planning applications and building control- plus we can introduce you to accredited tradesmen, such as gas safe engineers and certified electricians to help you finish every project to the highest standards. Contact us today for a free quotation- no pressure and no obligation. References available. Fensa and CPA registered.
Are you looking for an honest, reliable builder with an excellent attention to detail to bring your plans to life? Are you looking to create to an open plan kitchen extension to bring the family together, or even an office in your garage as you're now working from home or maybe an extra bedroom in the loft to create more living space? 1Horizon Design & Build Limited is a construction company offering complete building services throughout Northamptonshire and surrounding areas. Through design and planning to building and completion - our approach is always the same - strategic, professional and with true attention to detail. We pride ourselves on our communication, we keep clients updated every step of the way to ensure they know exactly what’s going to happen and when. Our services include - - Extensions - New builds - Renovations - Loft conversions - Garage conversions - Garden rooms Please get in touch today, and discover the advantages of working with 1Horizon Design & Build Limited.
We are very happy we went with 1Horizon. We wanted to do some of the internal work ourselves and they were the only ones we spoke to who agreed to this. They were happy to work with us on our quote to get what we needed. Aiden and his team were friendly, honest and reliable throughout and the standard of work provided by all trades was excellent. I would have no hesitation in recommending to others.
We believe that no job is too small. From home refurbishments to large commercial contracts, we are experienced and knowledgable to get the job done for you! Every job is managed by coowner Michael to ensure every project is delivered to the highest standards. We work with you every step of the way to capture your requirements and ensure the result is just as it was envisioned. We take pride in our ability to provide professional, timely and experienced services.
Michal and team did a great job in adding office room, remodelling and fitting new kitchen, flooring and renovating the full house for us within 2.5 months. All team members were professional and worked very fast to complete the work on time.
Welcome to Rothwell Contracts & Rothwell Kitchens Ltd Nottinghamshire based family run businesses
Whoops, sorry, about the last comment about rcl builders, that comment was to another builder.
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.
Lee and Dean were very organised and were always in communication with us. I found that having a payment plan was a great idea as this lessened the big pay outs, the overall build was to a good standard especially it being the wettest March, April, May and June. Neat brickwork and work all completed hen they said it would be. If you are not happy with anything then they will sort ot out and their work is guaranteed for a time period after completion Thank you Broadway for making our dream come to reality.
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
Very prompt reply to query posted, understood the issue and came to resolve it within days. Gave me a quote for price and time and stuck to it. 100% improvement on what the previous builder had done, cannot ask for a better service.
Welcome to RHI Developments Ltd. RHI Developments Ltd provides a full range of construction services including Double Storey Extensions, Single Storey Extensions, Orangeries, Conservatories, Garage Conversions, Window and Door Conversions, Fascia & Sofits, Porches & Renovations. RHI is also a leading supplier of fitting Windows and Doors throughout the South Yorkshire region including Sheffield, Barnsley, Doncaster, Chesterfield and Rotherham. RHI Developments Ltd has a 100% customer satisfaction rating with Independent Warranty which gives you confidence from start to finish. For all extensions, orangeries and conservatories we can arrange all stages of your project from design to completion. Also you can be confident in the quality of our work by requesting references from our all our satisfied customers and view our recent projects.
We agreed 8 to 12 weeks to complete but ended up taking 9 months due to excuses that they had to go on other jobs
Multi skilled and creative. I have years of experience in house extensions, full renovations or smaller jobs, commercial or residential, Modern or classic, I am competent at what I do and put an effort into finishing each and every job with perfection and the customers’ satisfaction. I believe that as a small business, my communication and work ethics is a major aspect of what I do. Which is why I am very mindful of each customer and their requirements.
I have been established for 13 years and cover all aspects of building. We specialise in extensions from footings to completion. We have extensive experience in structural steel work and jobs that are potentially difficult due to limited space. We have completed work for new customers to view and by contacting us we can arrange the nearest job for you to view. We cover all of Essex and are also happy to travel to London and Kent.
Graham and his lads were great. Would highly recommend for your building works. Was always open book about costs and plan of action, spoke on the phone regularly and was always easy to get hold of to give you that piece of mind. Full kitchen extension 5m x 3m from start to finish. Trusted with access to the property and never had any issues.
We are a company that has been trading for the last six years in its current form. Before that I was a self employed builder for 25 years working on many projects ranging from new build, self build to small maintenance work . We now primarily do mid size extensions as well as new build, renovation and conversion. We also manufacture garden rooms and Glamping pods. We will Take a look at all jobs large or small. I am a time served bricklayer with city and guilds qualification and HNC. With an extensive knowledge all aspects of the building trade All our tradesmen are registered with the appropriate institutes and with certification. All work is guaranteed and fully insured.
Very pleased with finished job. Subbies used were excellent. Highly recommended.
We're a team of fully qualified and fully insured builders with over 30 years experience. We cover all aspects from small jobs such as hanging doors, all the way up to complete new builds. We're based in Hayle but cover the whole of the south west. If your looking to have work done don't be afraid to get in touch.
A good working relationship with your builder is essential and we definitely had that with Heyl Build. We agreed a price before the job started. Then we added to the job and each addition was quoted for so both parties knew where they were. The team worked hard through varying weather conditions and they were always polite. We are very happy with the end result and we would have no hesitation in recommending Heyl Build.
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.
Responded very promptly to my ad and came within days to start the job. They had to order special materials, and Xmas and New Year intervened, but once the holiday was over, they were back at the task. The work was completed efficiently, competently and the price reasonable. They were all very polite and friendly, Conor organising and supervising it all very well.
IBS SERVICES LTD it is a small family business that operates over 15 years, concentrating on quality and customer service with a friendly approach. We help our customers through all the job stages, from the design to the complete delivery of the task.
Radu was polite and punctual. He did an excellent job. I would recommend.
We are a fresh and dynamic company with 15+ years experience in construction and carpentry. We take great pride in all of our jobs big or small our quality of work is undeniable. With a friendly and reliable service we aim to please
Great team of lads nothing is too much of a problem kitchen extension and porch progressing well despite bad weather and supplier set backs will definitely use for other projects I need doing
We are a family run building company on Salisbury Plain with many years experience.We take on all trades and no job is too small.Our aim is job satisfaction,efficiency,cleanliness in any project we carry out small or large and good customer relations
Absolutely first class. There are no other ways to describe it. Consummate professionals, superb communication and above all else, truly honest. I cannot recommend them highly enough. Finished our extension before their own deadline and to the highest of standards. Thank you gents.
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