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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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“I am a versatile handyman with expertise in a wide range of home repairs, maintenance tasks, and gardening services. From fencing repairs, build,patio and paving to carpentry and painting, I bring a strong attention to detail and craftsmanship to every project. With my 5 years experience on private jobs,and all the customers been very happy about my services, i am pleased to introduce my self with confidence and enthusiasm! Additionally, I have experience in gardening, including landscaping, plant care, and garden maintenance. I am committed to delivering high-quality work that ensures both your home and outdoor spaces look their best.” I am new on this site,app, and I don’t have any reviews yet, but definitely they will come!
So pleased with the work Ciprian did for me. He sourced the security gate and found a great reasonable price for me. He communicated throughout and arrived promptly to my home to install the gate. He was very professional and polite at all times. He demonstrated how to use the gate and fully explained the whole process. I would recommend Ciprian and am very grateful for the work he completed.
Full property maintenance Handy man no job to big Painter & decorator Kitchen fitting r Bathroom fitting Tiles fitted Full house refurb HMO conversion
Absolutely 1st class response by Harj & his team to some very challenging works. Cannot recommend highly enough for any domestic or commercial projects. Good value, reliable, always polite & goes the extra mile to deliver the highest quality.
Danny General Builders specialises in structural work, extensions, refurbishing, loft conversions, roofing, fitting bathrooms and kitchens, and painting and decorating. All employees have more than 10 years experience and are insured.
Danny did an absolutely great job with my set of alcove shelves. He was friendly, diligent, extremely polite and did an excellent job. Highly recommend
Electrician at Self employed electrical engineer
Came out short notice. Managed to squeeze me in. Due to short notice of getting room plastered 3 days later. Had 4 double plugs put in. In chrome like I wanted. They were professional and cleaned up after themselves. Will definitely use again
Hi, I am Stefan, and I have three decades of experience as joiner, specialising in wood flooring and tiling, doors, wardrobes, decking, bathroom fitting and refurbishment.
CTA BUILDING CONTRACTORS LTD
House Extension
We are General Contractors and can undertake renovations/refurbishments as well as newbuild homes or extensions. We have qualified electricians, plumbers and highly carpenters. No job is too big or complicated. The principles of the business have combined experience of over 15 years and we pride ourselves on leaving our customers very happy.
Bristol House Extensions is a family owned business. Our workforce is fully qualified and experienced at working in domestic and commercial properties and carries out work for our customer, customer satisfaction is our main priority.
Really helpful people to deal with.
Quigley's
House Extension
Trusted local builders. Many work undertaken and all completed. Extentions, Bathrooms, Kitchens and all other aspects In building construction.
Hi im Tom from secure carpentry & renovation Ltd. We cover all aspects of property renovation and developments . We have over 25 years of experience and qualifications and pride our self in being at the top of our game the reviews speak for its self . We are a friendly and well organised company our work ethic is impeccable and extremely professional and tidy . Fully insured for all aspects of the trade.
Happy with job overall, skilled caftmanship. After job issue: Glue has leaked onto door from frame and hardened until seen on day of instalation. Was advised it can be fixed and will attend to it when passing by. The rating will be changed once this is fixed or new door installed as I paid for new door. It is not my doing thaglue leaked.
Carpentry, home repairs, painting and decorating - mostly interior work. But also repairing and repointing. Works alone but can get a team for bigger jobs. Big and small jobs. Serving mainly West and North West London. Over 10 years of experience.
Fast and efficient service.
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Hi, I do high quality Carpantery work. -Fitting doors -kitchen fitting -wooden floor installation as well as sanding and varnashing -Fitting sash windows
Qamil He constructed our loft conversion, which we more than happy with. He paid attention to detail and followed the drawings by the architect precisely.He was always willing to discuss any issues and communicate his next plans for the ongoing work. As he was hardworking and punctual the work was done to programme. Would highly recommend him and all the sub-contractors that he has used. Tracey and Andy Sparks
We are an electrical contractors with over 20 years of experience. NICEIC registration. Always delivering friendly and exceptional service. Public liability insurance for your peace of mind.
Great price, prompt and professional.
Business established since 2008
A great company to deal with, prompt, reliable and very professional. We live in an old Victorian house with hardly a straight angle anywhere. So Anunas had a tricky job to do. The job was done perfectly and to agreed cost. I would recommend this builder to you. If I could could give give 6 stars I would. Great job well done.
Home First Services - Qualified installer with over 20 years experience. Providing building and carpentry services. Aluminium and UPVC specialists.
Zane provided an outstanding service in carrying out building works and drainage in our garden We are very pleased with the experience from survey to completion
We are an established building company that has been trading for 20 years.Our work covers all types of construction from new builds to repairs,including extensions and loft conversions.All our work is high quality and reasonably priced.No job is too small
Job was easy to arrange, done quickly & good price too. Very pleased & would definitely use them again.
Hi, we are a group of 3 hard working people who are experienced in gardening and landscaping jobs for more than 5 working years.
Plumtree Home Improvements
House Extension
At Plumtree Home Improvements, we provide high-quality home improvements, driveways, and landscaping solutions to enhance both the look and functionality of your property. Whether you’re planning a home extension, an orangery, a new roof, windows, doors, or a stunning driveway, we have the expertise to bring your vision to life. Our services include: ? Home Extensions & Orangeries – Beautifully designed spaces that add value and style ? Roofing, Windows & Doors – Quality installations for durability and energy efficiency ? Driveways & Landscaping – Expertly installed resin, block paving, and imprinted concrete driveways, plus complete garden transformations ? Patios, Walls & Fencing – Creating stylish and practical outdoor spaces With over 15 years of experience, we take pride in delivering exceptional craftsmanship, attention to detail, and outstanding customer service. No matter the size of the project, we’re committed to quality from start to finish.
over 10 years experience ALL TRADES
I hired Tomasz to renovation my shower room. He removed old fittings, ran new plumbing and tiled the wall. However, he scratched my new unit, put paint on my bare wood door frame, put the shower up squint, fitted tile trim with silicon, left holes in the wall, built a pipe box too big, covered it with ugly correx, lost screws to fasten the towel rail to the wall so it's loose, and left it leaking, and installed tray in wrong place in shower. I had to undo much of his work and finish the job myself. :-(
Concept Claim Solutions (Croydon)
House Extension
Concept Claim Solutions (Croydon) is a franchise owned and operated under license, with a registered name of Croydon Claims & Building Services Ltd. Concept has over two decades of expertise in property insurance claims management, building repairs, home improvement and maintenance solutions. We take care of every aspect of your property insurance claim by providing FREE surveys, FREE quotes, and a FREE insurance claims management service subsequent to a Water Leak, Fire, Flood, Storm, Impact Damage, Criminal Damage, Subsidence or Malicious Damage. You only pay the policy excess pre-agreed with your Insurance provider. We Survey the damage sustained to your property, create a detailed report supported with a schedule of reinstatement works, negotiate with your insurer or their appointed loss adjuster to get your rightful claim authorised, and undertake all works to get your property back to its pre-loss condition. We have teams of surveyors, builders, decorators, plasterers, plumbers, electricians and highly qualified technical staff who deliver high quality building reinstatement work to our clients.
At Custom Carpentry & Construction we offer all aspects of carpentry and refurbishment services from Kitchen installations to full refurbishments we cover it all. what sets us off from the rest is our bespoke carpentry services that can be tailored to suit any need. we pride ourselves on our professional approach and customer satisfaction is a priority.
Joe's done a brilliant job retailing my front porc h. I'd definitely recommend him, and use his services again.
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