Extension Builders in Harrow, Greater London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (16 reviews)

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Some of our top rated extension builders in Harrow, Greater London

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Imeraj
No reviews yet
Extension Builder in Harrow, Greater London
I am a construction worker . I had 5 years working for a civil engineering company like supervisor . I have lot of skills referring construction ( steel erection , timber works , underground works etc ) . Last year i finished level 1 and 2 in plumbing aswell to complete more professional skill and manage the common problems in most of new and existing properties . Contact me if you have something and let proceed to fix or upgrade your properties .
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JC Group Property Sevices LTD
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
JC Group Ltd is a reliable and experienced building company offering bathroom installations, plumbing, home extensions, and general building works. With over 30 years of combined industry experience, we take pride in delivering high-quality workmanship, clear communication, and projects completed on time and within budget. We are committed to customer satisfaction and maintaining the highest standards on every job, no matter the size.
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Latest review:
We’re absolutely delighted with the extension and the overall experience from start to finish. The workmanship is to a very high standard, and everything was completed professionally and on schedule. Communication throughout the project was excellent, and we were kept informed at every stage. The team were reliable, tidy, and respectful of our home, and the finished extension has exceeded our expectations. We wouldn’t hesitate to recommend them to anyone looking for quality work and a stress-free build.
LIVAHAUS
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
We are a professional team and we are very responsible, punctual and on time with our work .
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Latest review:
Tiling- 16 Feb 2026
Luis did an excellent job on my bathroom. He had to do a lot of prep work before starting the tiling, including rebuilding the floor and repairing the walls. At every stage he explained what needed to be done, ensured that I wanted to go ahead, listed the materials that would be needed, and the cost. It made a huge different to me that Luis was willing to source and purchase all materials; he checked in with me from the suppliers as to choice and cost, and sent receipts for every penny. I cannot recommend him highly enough, for his knowledge and expertise, his honesty and hard work, and also for being such a lovely person, nothing is too much trouble. I am delighted with my new bathroom, and am planning more home improvements with Luis, when he is free again!
BYKEW
No reviews yet
Extension Builder in Harrow, Greater London
I’m very reliable person
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A brick project construction ltd
No reviews yet
Extension Builder in Harrow, Greater London
As an experienced and dedicated builder, I take pride in delivering high-quality craftsmanship and reliable service for every project. With a strong focus on attention to detail, clear communication, and customer satisfaction, I work closely with each client to bring their vision to life, whether it’s a small renovation or a large-scale construction. I understand that your home is your most important investment, and I’m committed to completing every job to the highest standard, on time, and within budget. Let’s work together to create something exceptional.
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a-z renovations and construction
No reviews yet
Extension Builder in Harrow, Greater London
My name is Avni, Our company is called 'a-z renovations & construction' we take all different kind of projects whether they are small or big. all of our jobs are mainly recommended. our jobs are: Extensions, loft conversions, mezzanine floors, plastering and plumbing, wall & floor tiling, painting and decorating, kitchen and bathroom fitting, carpentry, patio and garden fixing. we cover London and home counties.
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THE WEST 1 SERVICE GROUP LTD
No reviews yet
Extension Builder in Harrow, Greater London
West-1 Service Group is a London-based contractor providing reliable building maintenance, refurbishment and property repair services. We support homeowners, landlords, property managers and commercial clients with a range of works including building fabric repairs, refurbishment projects, fire door compliance, waste clearance and general property maintenance. Our focus is simple – clear communication, reliable service and work carried out to a high standard. We take pride in delivering practical solutions and maintaining safe, well-kept properties. Whether it’s a small repair, planned maintenance or a larger refurbishment project, we approach every job with professionalism and attention to detail. We are always happy to discuss new projects and provide straightforward advice where needed.
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Innovation Construction Design & Build Ltd
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
Innovation Construction Design & Build are a reliable & professional business dedicated to designs and finishes of the highest quality, tailored personally for the customer. We offer a friendly, methodical, personal and tidy service. Client care, satisfaction, reliability and being trustworthy is our company ethos and we ensure our company adheres to these core values as our basis for each project we are working on from small domestic projects to large commercial contracts
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Latest review:
Extensions- 5 Oct 2020
Billy, Darren & the team have just finished the single side and rear extension & refurb works on my house, and they've done a brilliant job! From the start, quotations we're received promptly and competitively priced. Communication for commencement of works (during COVID-19) was always going to be uncertain but, Billy dealt with this really well and scheduled the work in as soon as was achievable. From the first day on site it was clear the team have worked with each other for years and are willing to put the extra time in to get the build done quickly, but correctly. Communication throughout build was processed well and the guys are on hand to respond to queries and questions at all times. We had a delay in the project which was unforeseen, but we sat down and came to an agreement and the extra work was carried out quickly and the project was wrapped up in really good time. I wouldn't hesitate in recommending Innovation for any building or decoration work to friends and family as the end result of our place is stunning! Special shout out to Jordan, Fog, Florin (wood work wizard) & Joy for their hard work throughout. Thank you Innovation!
DECOHOMES LIMITED
No reviews yet
Extension Builder in Harrow, Greater London
Decohomes Limited have been established over 14 years . We are an experienced company who can help with all aspects of building trade. We are specialised in LOFT CONVERSIONS AND EXTENSIONS, KITCHEN, BATHROOM AND HOME REFURBISHMENT. COMPETITIVE PRICES!!
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Viranna Professional Building and Cleaning Service Ltd
Rating: 4.4 out of 5
Extension Builder in Harrow, Greater London
Viranna Brickwork Contractors are actively looking to take on more work and would like to be in your tender list. We are based in Surrey, South Croydon, but travel and work all over the South East. We have over 10 years’ experience in the Building industry and taking pride in the job. Looking forward to work with you on your next project. Viranna Professional Building and Cleaning Service LTD
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Latest review:
Bricklaying- 26 May 2020
Very professional and reliable. Quality of work is very high standard and will definitely use their services again. Come highly recommended.
ALTUN PROPERTY CONSULTANTS UK LIMITED
Rating: 4.7 out of 5
Extension Builder in Harrow, Greater London
Altun Property Consultants is committed in delivering best customer service by completing projects With high standards for our customer The important fundamentals of Altun Property Consultants Uk LTD We believe that our passion to deliver service and accomplish project from paper to real life has enabled us to succeed in the work we do as a company we are a Member of the Construction Line Cold Member No:00407264 SSIP Acclaim Certificate Health &safety 00407264 Master Builders Federation No:146129 and QANW MemberShip No; 42575 FENSA No:MTC Number: 19882 Attention to detail established over the years of experience has allowed me to bring a positive change in many homes and we hope to continue doing so Also we do offer 2 year 6 year 10 year warranty
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Latest review:
Extensions- 9 Jan 2019
Altun Property stepped into the project very anxiously and positive. The management were very helpful and assist us with the neighbours requirements, as our building is adjacent to a primary school. The project went thoroughly and took some time because it was a big project. Altun Property were very energetic and supportive throughout the work, they didn't object any amendment the project required and extra work needed. We have received several compliments from visitors to our office for the level of work conducted and the quality provided. Commissioning the work to Altun Property helped us heavily as a charity because we were able to save on the overall cost of the work. I would like to express our appreciation for the work conducted and look forward for further work together.
Elem Builders Ltd
No reviews yet
Extension Builder in Harrow, Greater London
I am a builder who has 15+ years experience, undertaking projects such as loft conversions, extensions and refurbishments.
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Jimmy construction
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
Hi 🙋‍♂️ we are professionally plasterer doing any type of render and we do refurbishment all type of building and decorating,extensions,loft conversion electric and plumbing we do best service....
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Latest review:
Restoration & Refurbishment- 8 Apr 2022
Amazing work . Very competitive rate . Clean Job . On time start . Finish with amazing satisfaction. They went extra mile to finish the job as promised. Very polite . And explained things very clearly . Honest and Trustworthy. 💯. We got 5 quotations and got cheaper quotations as-well, But we went with jimmy and Rubel for their expertise , technical knowledge . They got a team who can help them to cover every aspect of work . Well done and Thank you
Pearsons Brother Builder and Contractor LTD
No reviews yet
Extension Builder in Harrow, Greater London
Hi we are builders and contractors and we do all sort of building job like renovation, extension, loft conversions etc
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FORM & FIX CONSTRUCTION LTD
No reviews yet
Extension Builder in Harrow, Greater London
I’m soheil, the Director of FORM & FIX CONSTRUCTION COMPANY . We are a reputable construction company specializing in construction . With extensive experience in the industry, I lead our team in ensuring the highest standards of quality, safety, and efficiency across every project. My role is to guide our operations with a focus on delivering exceptional results, fostering strong client relationships, and driving sustainable growth for the company.”
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CIRCLELETTINGs london limited
New on MyBuilder
Extension Builder in Harrow, Greater London
an experienced builder with good knowledge of building, plastering, tiling job
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3.9

Top rated Extension Builders

Our Extension Builders in Harrow, Greater London, are rated 3.9 out of 5 based on 16 reviews from customers like you.

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What types of services are offered by local extension builders in Harrow, Greater London?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in Harrow, Greater London for you. They can help with a variety of tasks and projects, including:

Extending your home with an extra room
Two+ storey extensions
Adding partition walls to create more rooms
Building annexes or external structures

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in Harrow, Greater London who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Harrow, Greater London extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Harrow, Greater London?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Harrow, Greater London will charge between £16 and £42 per hour.

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several Harrow, Greater London extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Harrow, Greater London home extension project is likely to cost.

Find extension builders in Harrow, Greater London with MyBuilder

Hiring the right extension builder in Harrow, Greater London with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local Harrow, Greater London extension builders. Once your job is live, we’ll share it with home extension builders in Harrow, Greater London who can express their interest.

Step 2: Compare different extension builders in Harrow, Greater London

When you start receiving interest, review profiles of local Harrow, Greater London extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Harrow, Greater London extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Harrow, Greater London, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

Harrow, Greater London extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Harrow, Greater London extension builder before hiring?

Before hiring an extension builder in Harrow, Greater London or extension building company in Harrow, Greater London, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in Harrow, Greater London?

An extension builder in Harrow, Greater London should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your Harrow, Greater London extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in Harrow, Greater London?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the Harrow, Greater London extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most Harrow, Greater London extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in Harrow, Greater London

Can an extension builder in Harrow, Greater London help with planning permission?

Yes, many extension builders in Harrow, Greater London can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in Harrow, Greater London handle everything from design to construction?

Many Harrow, Greater London extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in Harrow, Greater London help with materials and finishes?

Yes, most extension builders in Harrow, Greater London can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.