Extension builders in Harrow

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.5 (15 reviews)

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Some of our top rated extension builders in Harrow

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Gjat construction ltd.
Rating: 4 out of 5
Extension Builder in Harrow
We provide high quality services with bathrooms and kitchens to stand out. We supply high standard services at affordable prices. Experts in house, kitchen and bathroom renovations with more than 10 years of experience. Contact us for free estimates.
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Latest review:
Bathroom Fitting- 22 Apr 2023
Younger brother Anti was a professional and I would hire again but beware of the elder sibling as his workmanship his poor, here is a list:- 1) the cupboard fitted under the stairs was misaligned and the hinges are loose. Paint job was poorly finished too. 2) cupboard fitted across the boiler was all bent. Anti came and fixed it. 3) varnish across door and skirting boards were done once and therefore have an uneven spread 4) the floorboards did not have enough glue placed in certain areas so it creaks 5) grout in some time are missing 6) really poor sealant work on the bathroom 7) broke my £2000 TV and then hid the evidence. I only found out after placing the furniture back in its place. In contrast Anti did a good job in fitting the radiator. If you can Illicit promises of Anti only completing the job without the older the brother then go for it or else give them a wide berth.
William rumball
No reviews yet
Extension Builder in Harrow
Specialists in all brick and building work
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DM construction
No reviews yet
Extension Builder in Harrow
At DM construction, we specialise in high-quality domestic works including flooring, ceilings, paintings, partitions and general refurbishments, We bring a professional approach to every project, ensuring safe, reliable and on-time delivery. We pride ourselves on workmanship, honesty, and customer satisfaction
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Soho Building and maintenance Ltd
Rating: 5 out of 5
Extension Builder in Harrow
We are Soho Building and Maintenance Ltd, currently in our second year of business. We have an abundance of experience in the building industry with our own fully vetted trades including our own in house quantity surveyor for any large tenders. We undertake works of any amount no matter big or small, we can work with architects under minor works contracts
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Latest review:
Rear single story extension. Knocked wall out to extend kitchen. Craig -workman - very good. Lee and Dan project managed and were both excellent. Very please with everything, they turned up on time and when they said they would, cleaned up and finished build on time as agreed. I would recommend them to anyone.
London & Kent Best Kitchen & Bathroom Solutions Ltd.
Rating: 5 out of 5
Extension Builder in Harrow
Our highly skilled team of builders, carpenters, electricians, decorators and plumbers are reliable, trustworthy and dedicated to achieving the highest quality finish for your project; however large or small. Each project is tailored to your requirements and managed via a single point of contact.
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Latest review:
Bathroom Fitting- 26 Nov 2020
Sylwester and team did a fantastic job and were incredibly accommodating and polite with all of our requests. Would definitely recommend.
Raviservices limited
No reviews yet
Extension Builder in Harrow
Normally I am doing all types of work. Such as renovations, loft conversion, bathrooms, kitchens and bedroom, double and triple glazing upve and aluminium. Underfloor heating, extensions,porches (stone work as well),roofing (tiles,flat roof)
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BUTA PRO LTD
No reviews yet
Extension Builder in Harrow
BUTA Pro Ltd - is a renovation contractor, who are professionals, specializes in renovating the interior, exterior of existing homes and businesses. Our teams have a strong understanding of construction techniques and materials, as well as experience in project management. Also we are able to communicate effectively with clients, to understand their needs. Our architects and engineers will carefully check your needs, create a budget, designing the layout, and obtaining the necessary permits. We build-renovate your dreams...
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MS Builder
No reviews yet
Extension Builder in Harrow
I am good in decorating and painting things
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Johal builders
No reviews yet
Extension Builder in Harrow
Hi I’m jagjit johal we r doing excellent work house extension and loft conversion i have 20 years experience for building works
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Su Su Construction Limited
Rating: 5 out of 5
Extension Builder in Harrow
Welcome to Susu Construction: Your Premier London Construction Partner Are you searching for a London construction company that stands out for its excellence, commitment, and innovation? Look no further than Susu Construction, your go-to choice for top-notch construction solutions in the bustling capital of London.
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Latest review:
Groundwork & Foundations- 2 Dec 2022
We are very happy and glad to have found Su Su Construction. It is great to work with such an open minded contractor who is very experienced and diligent. To us architects it is really important to be able to explore alternative means of construction in order to create long lasting, beautiful and healthy environments and with SuSu we are on the right track. Highly recommend.
grantconstruction0
Rating: 5 out of 5
Extension Builder in Harrow
The construction company carries out and performs a full range of complex interior finishing works, general contracting for the repair and reconstruction of buildings and premises in commercial areas. The main direction in which the company operates is commercial real estate: shopping, entertainment and office centers, factories, hotels, logistics complexes and scattered throughout London will undertake any repair and restoration work. We use only high-quality materials and tools to ensure the highest quality of work, in addition, we always adhere to the agreed deadlines and budget, which allows our clients to be confident that the repair work will be completed on time and without unnecessary costs
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Latest review:
Tiling- 4 Oct 2026
After some confusion about when arriving. Went well. Ensure clear understanding, prior to work starting, on who is providing materials while agreeing costs. Would recommend.
H&J Properties 02 Ltd
Rating: 5 out of 5
Extension Builder in Harrow
H&J Properties is your friendly, reliable small team with over 10 years of experience in the building industry. We design, plan, build, and project manage, so you can rely on us for a full round of service. From floor and wall tiling to full kitchen and bathroom installations, we’ve got your home covered. We handle plastering, painting, drylining, insulation, and more with precision and pride. Need a loft, rear or basement extension, a new roof, or concrete work? No problem. Whether it’s bricklaying, basement waterproofing, or installing windows and doors, we bring craftsmanship and care to every job. Big or small, we build it right. Please message us directly for more project images.
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Latest review:
We have contracted H&J Properties for our house refurbishment in London. I was impressed with the team's professionalism and project management from start to finish. We had no plans or planning approved, so we wanted a design and build company who will be able to look after the project from start to finish. They did just that. Working with the architects and the planning application before starting the project planning. As always, there are, of course, unforeseen issues arising with the old houses in london but I could't be happier with the communication received from the team. Thanks for the great job.
PRIMEBUILD&DESIGN LTD
New on MyBuilder
Extension Builder in Harrow
PRIMEBUILD&DESIGN LTD is a professional building company focused on delivering high-quality home extensions, renovations and general building work. We take pride in reliable workmanship, clear communication and keeping every project organised from start to finish. We work closely with our customers to understand exactly what they want and provide practical solutions throughout the project. We aim to keep sites clean and tidy, respect our customers’ homes and complete work to a high standard. Whether you are planning an extension, structural alterations, refurbishment or other building improvements, PRIMEBUILD&DESIGN LTD is committed to providing a professional and dependable service. We are happy to discuss your project, answer questions and provide a clear quotation before work begins.
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Majesticbuild
Rating: 3 out of 5
Extension Builder in Harrow
At Majestic Build Construction Company, we don’t just build structures; we craft environments that blend seamlessly with nature. With a passion for creating breathtaking outdoor spaces, our landscaping services are designed to enhance the natural beauty of any property, be it residential, commercial, or public. We specialize in: • Custom Landscape Design: Tailored to suit your vision and the unique features of your land. • Hardscaping Solutions: Including patios, walkways, retaining walls, and water features that add depth and functionality to your outdoors. • Sustainable Landscaping: Focusing on eco-friendly practices and native plant selections for a greener future. • Comprehensive Maintenance: Ensuring your landscapes remain as vibrant and immaculate as the day they were created. With a dedicated team of professionals and a reputation for excellence, Majestic Build Construction Company transforms ordinary spaces into extraordinary outdoor experiences. Let us bring your landscaping dreams to life!
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Latest review:
Bricklaying- 17 Dec 2024
They initially gave a fair price and a date and timeline that fitted with our needs. Subsequently they over ordered on the bricks so we had over 100+ expensive London bricks left over and they under ordered on sand and cement.(Luckily the shop took them back but we had to deliver them there) The job took far longer than they had said although the poor weather did not help much which could not be helped. The worst was that the wall was finished so that the latch of the gate could not be fitted as the wall was a bit too long! The wall looks good but their customer service and time given for job as well as ordering materials needs some improvements. They are pleasant workers, not rude in speaking
Noli Antzara
Rating: 5 out of 5
Extension Builder in Harrow
I’m Noli Antzara, a North London tradesman with 37 years of experience. I started working alongside my father at 18 and have spent my working life developing my craft. My main specialities are tiling, paving and brickwork. I also take on bathroom and kitchen tiling, slabs, garden work, blockwork, extensions and painting. Whether it’s a small repair or a larger project, I give the same care and attention to the finish. I prefer to visit the property, listen to what you want and provide a clear quote before starting. Depending on availability, I can often begin within one or two days. I’m based in North London and can travel approximately 60–70 miles for the right job. I know that inviting a tradesman into your home takes trust. I treat every property with respect, protect the areas I’m working in and keep the space as tidy as the job allows. I communicate clearly, take pride in the details and want you to feel comfortable raising questions along the way. After 37 years, I still care about improving and doing work I’m proud to put my name to. My aim is simple: to deliver a quality finish and leave every customer feeling that their home was in good hands.
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Latest review:
Tiling- 6 Oct 2026
I couldn’t recommend Noli highly enough. He was incredibly friendly, professional and reliable from start to finish. His quote was very competitive and included all the materials. After seeing the fantastic job he did on my front garden, I wish I hired him before. His attention to detail and quality were impeccable. I’m genuinely grateful for his excellent service and have no doubt that Noli will be my first and only choice for any future projects. HIGHLY RECOMMENDED!
Mariusz Moniuszko
No reviews yet
Extension Builder in Harrow
I have had a registered general contracting company since 2004. I have also achieved Master Builder status
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4.5

Top rated Extension Builders

Our Extension Builders in Harrow, are rated 4.5 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?

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 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 who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Harrow?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Harrow 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 extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Harrow home extension project is likely to cost.

Find extension builders in Harrow with MyBuilder

Hiring the right extension builder in Harrow 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 extension builders. Once your job is live, we’ll share it with home extension builders in Harrow who can express their interest.

Step 2: Compare different extension builders in Harrow

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

Step 3: Hire Harrow extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Harrow, 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 extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Harrow extension builder before hiring?

Before hiring an extension builder in Harrow or extension building company in Harrow, 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?

An extension builder in Harrow 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 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?

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 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 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

Can an extension builder in Harrow help with planning permission?

Yes, many extension builders in Harrow 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 handle everything from design to construction?

Many Harrow 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 help with materials and finishes?

Yes, most extension builders in Harrow 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.