Extension Builders in Harrow, Greater London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (15 reviews)

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

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LeveLine General Builders
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
LeveLine General Builders has grown steadily over recent years. We pride ourselves on customer service and attention to detail. We offer a full architectural and design service to ensure we deliver quality construction projects from start to finish, keeping the customer fully informed at all stages.
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Latest review:
Bricklaying- 27 Feb 2021
Andrew was prompt, efficient and produced high quality work. From the start, he made us feel comfortable we had given the job to the right person. I am extremely pleased we chose to use Andy and I will definitely recommend his services and use again should the need arise. Thank you very much for an outstanding job and pleasant experience.
Dan’s Team Projects Ltd
No reviews yet
Extension Builder in Harrow, Greater London
25 y of experience in building sector. Working as a multi trade person for companies now set up own . Always good communication and problem solving.
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NG Construction Team Ltd
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
Elevate your space with NG Construction Team. Our expert builders and contractors ensures seamless, budget-friendly projects on schedule. Discover the perfect blend of skill and experience for your dream home transformation. We are professionals known for our efficiency, approachability, and exceptional functionality. Our team tackles every job with the skill and experience our clients rely on.
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Latest review:
Plastering- 8 Oct 2022
Excellent, 100%-recommended, 5-stars out of 5! Honest, knowledgeable, careful and conscientious with his work, flexible, hard-working, on-time, good communication (in-person and via txt) and v friendly. My project involved multi-finish/skim-plastering 3 rooms in a loft extension, including various fiddly/tricky bits. I will not hesitate to use Gediminas again for both large and small jobs - many thx :)
ZS Property Maintenance Limited
No reviews yet
Extension Builder in Harrow, Greater London
At ZS PROPERTY MAINTENANCE LTD, we take pride in being a Safe Contractor accredited company with extensive experience working with housing associations throughout London. Our team of skilled operatives is fully DBS checked, ensuring a high level of trust and security in all our services. We supply all necessary products and materials to deliver meticulous and efficient results. Our comprehensive range of services includes waste removal, property refurbishment, locksmith services, end-of-tenancy cleaning, painting, kitchen fitting, windows and door installation, and house clearance. Whether you're updating a property, securing a home, or managing a move, we are committed to providing top-quality service tailored to meet your needs.
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Tota Builders
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
Tota Builders are a polite and hard working team, Qualified tradesman, we do commercial and domestic jobs, Our goal is to leave our clients happy with high standard work, We are allso checkatrade approved,and we have been with them for 4 years,
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Latest review:
Carpentry- 23 Nov 2019
Carpenter showed-up on time both days and finished the work ahead of schedule. Nice people and dedicated carpenters. Before living, they cleaned-up all the area and left everything tidy. I would recommend Toptan Tota and would hire them again.
manibuilder
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
Mani construction ltd is an established professional building services based in london. we have over 10 years experience in total in building trade,we can take the guesswork out of any building problem and will recommend the best solution based on your requirements. the quality of work will never drop regardless of the size of complexity of the job in hand.
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Latest review:
Plastering- 13 Jun 2020
Andi and his team were amazing. They removed the existing plasterboard ceiling and replaced it then plastered the walls and ceiling. His price was very reasonable and job was done to a very high standard. His team were very friendly and their work was clean. Andi even went out his way to help me pick up a few heavy items from shops and load it in his van. Cannot fault his work and finished work on the time scale given. Recommend to all. Thanks to Andi and his team for giving my house a fresh look.
S fartade serban
No reviews yet
Extension Builder in Harrow, Greater London
Hello, and thank you for considering our services for your construction needs. We are a team of experienced professionals dedicated to delivering high-quality, reliable, and innovative construction solutions. Whether you're planning a residential project, a commercial build, or a renovation, we bring expertise, attention to detail, and a commitment to customer satisfaction to every job we take on. Our goal is to make your vision a reality, from the initial design phase through to project completion. We prioritize clear communication, timely execution, and ensuring your project stays on budget. With us, you can expect a seamless experience and outstanding results.
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ESL Excel Services
No reviews yet
Extension Builder in Harrow, Greater London
ESL adopts an interactive approach between project team members ensuring value can be obtained at all stages of project development and implementation. Firm has cultivated long term relationships with clients and adopted an integrated team approach with all those involved in a project that has resulted in ongoing repeat business and successful project outcomes. At each stage of the design and construction process the firm delivers value by use of carefully structured procedures that are particularly effective during the earlier stages of projects. Highly motivated, dedicated and experienced team, who remain closely involved throughout each assignment. Members of the project team will explore all strategic issues, and facilitate discussions, to ensure that the key objectives of a project are identified and appropriate solutions devised at each stage.
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S.A.S Electrical Solutions
Rating: 4.8 out of 5
Extension Builder in Harrow, Greater London
We are a reliable and friendly business and value ourselves for the quality workmanship we can give you. We are an N.I.C.E.I.C fully approved trained electrical company that covers all aspects of wiring from Domestic or commercial to industrial premises. We have 20 + years experience. We complete and oversee all aspects of building trades to complete various types of projects. We now also specialise in Photovoltaic Solar Installation & Electric Vehicle Chargers.
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Latest review:
Electrical- 30 Oct 2025
Since Steve and his team came on board, the progress on site has improved significantly. Their professionalism, efficiency, and strong work ethic have made a real difference. Steve provided a very fair and reasonable quote, and his approach to the job has been both proactive and solution-focused. Even though the work is still in progress, it’s clear that Steve’s expertise and leadership are helping to move things forward faster and more smoothly than before. His attention to detail and willingness to go the extra mile have been greatly appreciated. I’m very pleased with the results so far and have full confidence that the finished work will be of a high standard. I highly recommend Steve and his team for any electrical work, they’re reliable, skilled, and a pleasure to work with.
George
No reviews yet
Extension Builder in Harrow, Greater London
On time hard working
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Ram design and build Ltd
No reviews yet
Extension Builder in Harrow, Greater London
A construction company based in NW London. No job is too big or small. From log conversion to maintenance £ everything in between. Loft conversion Decorating & paint Garden clearance & Landscape Repairs and maintenance Plumbing
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Volodymyr Girkovskyi
Rating: 4.7 out of 5
Extension Builder in Harrow, Greater London
I am responsible, I do my job carefully, I have extensive experience in building and renovating houses.
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Latest review:
Handyman- 9 Oct 2025
Good job, done as agreed
Alex Hriban
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
I take all sort of jobs from fencing to kitchen fitting and all sort of carpentry jobs and plumbing jobs
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Latest review:
Carpentry- 23 Dec 2022
Alex came very punctually to do the job and laid down a wooden hallway which I am very pleased with.He also repaired my front doors and added a draught excluder. Alex was patient, polite and got on with the job in a very efficient and cheerful manner-I would hire him again for other jobs in the future.
Ss construction
No reviews yet
Extension Builder in Harrow, Greater London
With over 20 years of experience in the construction industry, our company has built a strong reputation for delivering high-quality projects with reliability and precision. We specialize in residential, commercial, and renovation projects, ensuring every build meets the highest standards of craftsmanship, safety, and durability. Our dedicated team works closely with clients to turn their vision into reality while completing projects on time and within budget.
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Tim Alwyn Building Services
Rating: 5 out of 5
Extension Builder in Harrow, Greater London
Having been in the construction for about 20 years, I take on various jobs like extensions, rebuilds, patios, garden walls and all aspects of building works. Mainly aspects of brickwork and blockwork from the ground upwards.
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Latest review:
Bricklaying- 16 Nov 2024
Tim did a brilliant job rebuilding a wall on our driveway and doing some repointing. He was responsive, reliable and his work was of the highest quality. A real gent. My neighbours and the rest of our road are now after his help!
Armond Construction
No reviews yet
Extension Builder in Harrow, Greater London
We have been working for the past 20 years in construction. I have done and built new builds, extensions, loft conversion/extensions, home refurbishments, gardening and driveways. We cover all aspects of building.
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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 15 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.