Extension Builders in Harlesden

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (19 reviews)

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Some of our top rated extension builders in Harlesden

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Sam's Building Maintenance and Constructions Ltd
Rating: 5 out of 5
Extension Builder in Harlesden
Sam's Building Maintenance and Construction Ltd has more than 25 years experience in First and Second Fix carpentry, Kitchen installation, extension, loft conversion and general refurbishment work. We deliver quality services to meet customers' specifications and within stipulated deadlines .
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Latest review:
Sam did 5 and half meter kitchen, with large shower and laundry rooms extension for me. He is of very good character, worked professionally, reliable and his work was good.
Domus Fortis Construction Group Ltd
No reviews yet
Extension Builder in Harlesden
We are a construction company based in the heart of west London with 15+ years of combined construction experience
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Buildswell ltd
Rating: 5 out of 5
Extension Builder in Harlesden
my name is sehaj the main contractor of buildswell ltd.We are a full facilities management and installation company,If you are thinking of renovating your home,building an extension, or changing your roof. Sehaj from buildswell has a local and trusted construction business to provide maintenance and building services of the highest standard at competitive prices. Very friendly and professional
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Latest review:
Extensions- 20 Jan 2021
Trusted person good quality extension with no delays
Cunningham building services
Rating: 5 out of 5
Extension Builder in Harlesden
At Cunningham Building Services we believe in carrying out affordable, high quality work to suit every customer. Cunningham Buildings Services recruit only the very best tradesman to make up their construction team so rest assured the project will be carried out by experienced professionals. Our aim is to exceed our client's expectations and provide outstanding results so that every one of our client's would happily recommend us to a friend.
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Latest review:
Joes team did an Indian sandstone patio,paths and new Indian sandstone driveway, They did an excellent job and they left the site totally cleaned and I’m very pleased with the job.
Vgaas uk Ltd
Rating: 3.7 out of 5
Extension Builder in Harlesden
We specialise in loft conversions, extensions and new builds with over 10 years of experience.Excellent communication and planning is our main focus. We have a dedicated project manager on each site on top of a skilled foreman. All the team is skilled and experienced in their respective trades. We have had privilege to work on very demanding projects over the years, which required a lot of skill and planning on our part to deliver them successfully. Give us a call for a no obligation quote.
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Latest review:
Loft Conversion- 29 Apr 2023
My house was totally renovated by this company. I was very satisfied with much of the work. I was informed that I would be given the buildings certificate and the electrical certificate for works completed once final payment was received. I was given the buildings certificate. I was not given the electrical certificate, although the house had been fully rewired as part of the work. I chased up for the certificate but my requests were ignored. I was aware an electrician had come to inspect the works, and the builder who had been on site indicated it appeared to go well. I have now just recently had the electricity in the house inspected by an electrician and have found there were issues that required rectifying.
Denis Osan
No reviews yet
Extension Builder in Harlesden
I am a self-motivated individual with a strong aptitude for initiative and problem solving, consistently delivering results with meticulous accuracy and thoroughness. I leverage strong time management and skills to balance multiple priorities.
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shalom property development ltd
Rating: 5 out of 5
Extension Builder in Harlesden
Shalom Property Development ltd is a small construction company based in the Croydon area. We specialize in property refurbishment, house extensions, loft conversions, garage conversions, etc. We also undertake projects like plastering, painting/decorating, electricity, plumbing, tiling, flooring(laminate, wood, bamboo), bricklaying.
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Latest review:
Plastering- 6 May 2025
Amazing guys. Hardworking, tidy, professional. They worked in our house for 3 months and we were super happy with the work and everything. We invited them to do more work later on. 100% probably the most sincere and trustworthy builders we met. Only them. No one else from now on.
Rcm Buildrs
Rating: 5 out of 5
Extension Builder in Harlesden
RCM Builders is an insured construction company which offers a multitude of services. Loft conversions, extensions, painting, plastering, fencing, building renovations, and bricklaying are a few specialities we covers. We have over 28 years worth of experience and are well versed in providing high quality work, great customer service, great costumer satisfaction and great communication.
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Latest review:
Conversions - General- 7 Mar 2023
Have completed the job extremely well. Did a new door opening. Door fittings and plaster work . Very good finish. On time. Polite. Very pleased. Would hire again.
RELIABLE BUILDING CONTRACTORS LTD
Rating: 5 out of 5
Extension Builder in Harlesden
We have over 16 years experience on building site. Providing a professional and high quality service with warranty. New extension, Renovation, perfect kitchen, bathroom, plastering, decorating, electrical and plumbing .We can supply the material.
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Latest review:
Kitchen Fitting- 11 Oct 2018
Mohsen went above and beyond with our kitchen face lift. He did exactly as asked, to a very professional standard. Mohsen is very hard working, has high standards and was reliable. He also suggested ways to improve our kitchen, and corrected some previous poor work from other builders! We love the job and will definitely use Mohsen and his team again for future work.
L.S Building and landscaping services
Rating: 5 out of 5
Extension Builder in Harlesden
L.s Building and landscaping services can offer you a stress free job as we take care In every thing we do around your property. I have studied Bricklaying at college for 2 years. I have 16 years of experience in the building game . we under take extension’s, garden wall’s, repointing wall’s, slabbing ,exterior porcelain tileing patio and all outher types of landscaping. I take Pride in my work and have attention for detail.
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Latest review:
Fencing- 29 Jan 2019
Did job on time, as specified and to value of quote.
Ed’s loft conversions Ltd
Rating: 5 out of 5
Extension Builder in Harlesden
We specialise in loft conversions, Extension to a complete house refurbishment.
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Latest review:
I engaged Edi to work on a full renovation and refurbishment of a 4 bedroom detached house with front and back gardens on Blackheath’s Cator Estate. Edi did an extensive amount of work, including stripping out; plumbing; plastering; windows installation; carpentry; and decoration. In addition, after commencing the property work, once the scaffold had been erected, following sensible advice, Edi and his team replaced the roof and fully insulated the attic; fitted additional electric points; rebuilt the garden patio; and replaced the flooring throughout, in addition to other important jobs including re rendering and pointing of chimneys, building new wardrobes in the main bedrooms; and upgrading the radiators. A new kitchen, and two new bathrooms have been fitted. The kitchen redesign meant knocking through a wall with the lounge to create a larger space. Edi is a highly skilled craftsman, who thinks creatively as he works to make best use of the space, including shelf fittings, and additional lighting for example. He has built some beautiful wardrobes, and the internal decorations have brightened up what was previously a rather shabby looking house. In addition to the above, I wish to commend Edi for his professionalism, courtesy, and passion for doing the best work possible. On all the site visits I attended, and every time I spoke with him on the phone, it was striking how much he cared about the work that he was doing, his desire to ensure that the house would look the best. I always left site visits with the feeling that he cared so much about the house that he could be safely relied on to give the best advice to enable us to make the right decisions. I also noticed that Edi and his team would take the upmost care to keep the property safe, tidy and in good shape throughout the project. He can be fully trusted to look after any site he works on. He is intelligent and careful when it comes to safety and security. It has been a pleasure for Edi and his team to work with us over a period of around 6 months, and he did so much to reduce the stress of a significant project so that we could always rely on him to work methodically, patiently and sensibly, and to make best use of the resources available. His pleasantness shines through, and everyone I know who has spoken to him has always provided me with the most positive feedback I have no hesitation in recommending Edi to anyone who wishes to engage him for future projects, and is most deserving of the good words that I and others that work with him have to say about him.
J & M loft conversion ltd
Rating: 5 out of 5
Extension Builder in Harlesden
I’m a skilled landscaper with experience in designing and creating outdoor spaces that are both functional and visually appealing. From turfing and patios to fencing, planting, and garden maintenance, I take pride in delivering high-quality work with attention to detail. My goal is to transform outdoor areas into spaces homeowners can enjoy all year round. Reliable, hardworking, and customer-focused, I ensure every project is completed to the highest standard.
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Latest review:
Fencing- 6 May 2026
new fence built very quickly and well done!
RAQS Investment Limited
No reviews yet
Extension Builder in Harlesden
We carry out all types of building works for both residential and commercial properties, including loft conversations, extension, refurbishment, general maintenance, painting & decorating, carpentry, plumbing & central heating, electrical works, tiling. Our team comprises of professional builders, who have been carrying out the work in & around Greater London for the past two decades. We also have a branch office in East London and we cover East London as well.
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CHL IMPROVEMENTS LTD
No reviews yet
Extension Builder in Harlesden
North London based 10 years of experience
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Westldnconstruction
Rating: 5 out of 5
Extension Builder in Harlesden
Hi everyone My name is jass from Westldnconstruction we based in west London Our aim is to consistently deliver an excellent service to each and every customer. We provide a fair and honest approach to pricing with detailed quotations presented for your consideration, and we take the upmost pride and care in our service, ensuring you get the very best result possible.
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Latest review:
Extensions- 15 Sep 2025
We hired Jass for rear and side extension and Bathroom renovation. Jass gave us a reasonable offer for the build work. Jass told us It will take 8 weeks to complete but finished the job in six weeks. Jass has a team of hard working, professional and skilled workers. We are Really happy we hired Jass and his team who have produced a beautiful extension, patio and bathroom for us. Would happily recommend him to anyone.
Santophy Street Limited
No reviews yet
Extension Builder in Harlesden
Santophy Street Limited offer a professional and comprehensive development service, tailored to suit the construction and logistical challenges that each individual project offers. Having delivered some of most complex commercial and residential projects in London over a combined 23 years, Santophy Streets Director's, Adom Calliste and Chris Doel, work as a team to ensure that all legal and construction risks are identified and mitigated to ensure maximum value is extracted for our clients.
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4.1

Top rated Extension Builders

Our Extension Builders in Harlesden, are rated 4.1 out of 5 based on 19 reviews from customers like you.

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What types of services are offered by local extension builders in Harlesden?

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 Harlesden 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 Harlesden who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Harlesden?

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

Find extension builders in Harlesden with MyBuilder

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

Step 2: Compare different extension builders in Harlesden

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

Step 3: Hire Harlesden extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Harlesden, 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.

Harlesden extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Harlesden extension builder before hiring?

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

An extension builder in Harlesden 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 Harlesden 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 Harlesden?

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 Harlesden 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 Harlesden 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 Harlesden

Can an extension builder in Harlesden help with planning permission?

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

Many Harlesden 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 Harlesden help with materials and finishes?

Yes, most extension builders in Harlesden 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.