Extension Builders in Harlesden

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (21 reviews)

Easily find verified Harlesden Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Harlesden.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Harlesden

3466 Results

Sort by:

Ivan
Rating: 5 out of 5
Extension Builder in Harlesden
Extension from footings to finish painting, bathrooms, kitchens, refurbishment, patios, gardens etc
Get in touch
Latest review:
Restoration & Refurbishment- 12 Feb 2025
Ivan was friendly, methodical . Our stairs no longer creak. He reinforced everything from underneath, put plaster back. Very happy with the job. Keeping his details should we have anything else needing fixing. Would recommend him
RVR PRO BUILDERS LTD
Rating: 5 out of 5
Extension Builder in Harlesden
With a very high standard of work and experience in kitchen installation, carpentry, built in wardrobes, etc. We offer a range of services to help you with your projects, free quotes and information.
Get in touch
Latest review:
Kitchen Fitting- 2 Feb 2020
Took out my old kitchen and fit a new one. Excellent professional job, no complaints at all. Would certainly hire again.
Inspired Creations London Ltd
Rating: 5 out of 5
Extension Builder in Harlesden
We undertake residential and general construction projects including extensions, loft conversions and renovations. We also manufacture and install bespoke kitchens, bedroom and all kinds of fitted furniture.
Get in touch
Latest review:
Extensions- 8 Dec 2021
Sukh and his team are tidy, experienced and skilled. The standard of work throughout the house is excellent. Will be keeping their contact details for any future projects. Would definitely recommend.
AlfredM Building Contractors Ltd
Rating: 5 out of 5
Extension Builder in Harlesden
AlfredM Building Contractors LTD Construction company specialising in • Loft Conversions • Extensions • Full House Refurbishments • Domestic & Commercial Building Services • New Build Eager to bring your dream project to life. Dedicated, efficient and passionate.
Get in touch
Latest review:
Carpentry- 18 Jan 2025
Alfred and his team have done a great job. Replaced the floorboards, joists, installed insulation and damp proofing and sent the extra mile. Highly recommended and I am already using them for a host of other work.
Mbalau Construction LTD
Rating: 5 out of 5
Extension Builder in Harlesden
Builder with 20 years of experience . I provide a wide range of building services such as: loft conversion, extensions,bathroom refurbishment,house refurbishment , plumbing and electric etc . I have the tools,knowledge and team to build a house from start to finish . I can provide references and pictures of previous work upon request .
Get in touch
Latest review:
Complete refurbishment of 2 bed 1100 sq ft flat. Including removal internal walls Ripping out and renovating 2 bathrooms. Involving new layout replumbng and relocation of #electrics. Tileing Preparing and laying wood flooring throughout. Fitting shelving and book case. The work over 2 months involved all building skills. Throughout Marcel and his highly skilled crew were efficient clean and resourceful. I would highly recommend for all building and decoration work.
fedora and sons
Rating: 4.4 out of 5
Extension Builder in Harlesden
I have started working for myself in Europe for 10 years, came over to England with my family and have been working here for 11 years getting business from word of mouth. In my business I manage lots of sub contractors covering a wide range of trades which I have experience in too.
Get in touch
Latest review:
Painting & Decorating- 24 Feb 2020
Quite literally the worst tradesman I have ever worked within 25 years as a property developer! He came and quoted to paint my house (a good price I must say), little did I know that this meant he would spray everything that he can see, not prepare the surfaces by sanding them down or protects things. This included door handles, hinges, radiators, alarms sensors, tiles and my own furniture and cooking utensils. First time I confronted him about this he said that we would clean everything, and we agreed to carry own. However, it became apparent that we was doing the same as previously discussed. have paid hi 66% of what was agreed, I quickly realised that the damaged he has caused was going to cost me far more and I told him to leave. The next day he turned up at my house with his wife demanding the balance which I refused to give him, they were both shouting outside my house, threatening to call the police. I eventually agreed to pay the 50% of what was left, just so that they would leave. However, even once he had confirmed writing his acceptance of this, he walks over to me and threatened me one final time, saying that he will take me to court etc, there is god and he will see to me! I advise to stay away from this person, better to pay a little more and work with professionals who don't agree with one thing and do another. He paints using a spray, which means you can not touch anything up and he quite literally paints everything he sees!!
BFG Construction Limited
Rating: 5 out of 5
Extension Builder in Harlesden
We Are specialised on all of the trades mentioned below, we guarantee high standard finish and reliable trustworthy works, we provide free estimated to any work. Do not hesitate to contact us, references provided for all works to be undertaken. Thank you.
Get in touch
Latest review:
Carpentry- 24 Dec 2018
Ben and Genc did a fantastic job. They fitted the fire and smoke strips into my fire door very neatly and cleaned up thoroughly. They were able to come out quickly and it took them no time at all. I am delighted with the result!
Adrian
Rating: 5 out of 5
Extension Builder in Harlesden
Ady Construction Services LTD is a full-service building company providing high-quality construction, renovation, and property maintenance solutions across residential and commercial sectors. From groundwork, brickwork, roofing, and extensions to full refurbishments, kitchen and bathroom installations, landscaping, and decorating, we cover every aspect of building work. With a skilled team, attention to detail, and a commitment to excellence, we deliver reliable and cost-effective services tailored to each client’s needs — from start to finish.
Get in touch
Latest review:
Landscaping- 23 Mar 2025
Great job - promptly done and good quality!
Vlad Chiroban
Rating: 5 out of 5
Extension Builder in Harlesden
Hi ! If anyone interested about my services don’t hesitate to contact me I have over 12 years experience in drylining , tape and jointing , plaster and painting Also I can do general buildings Many thanks
Get in touch
Latest review:
Painting & Decorating- 28 Apr 2021
Vlad and his team was very polite and professional. The guys repainted my living-room, hallway and kitchen along with repairs I needed doing around my Flat. This included re-plastering and general making good inside/outside the property. Vlad even went out of his way to help me find the right paint for my walls and provided honest advice. The team made sure the work was done to a high standard, ensuring the flat was clean before they left. I needed the work to be done quickly and this was done in good time and at a good price. Easy going, I would definitely hire them in future.
Pine Construction Ltd.
Rating: 5 out of 5
Extension Builder in Harlesden
As a civil engineer and principal building contractor we consult, design, construct and project manage any dwelling and commercial projects from minor repairs to complete new-build as well as any type of restoration/renovation and basement construction projects.
Get in touch
Latest review:
Extensions- 19 Oct 2017
The best team in London to work with they are highly skilled professionals and very easy to work with looking forward to work with them again
ADJ Builders Limited
Rating: 5 out of 5
Extension Builder in Harlesden
Hello ..my name is Alfred. I, have over 12 years of experience in building site. Perfectionist in my work and ability to guarantee customer satisfaction. Hard working and ensures all deadlines and targets are met. A good eye for detail, precise and accurate at all times and will complete all work to the highest standards.My experience shows in the finish, with no visible streaks. Polite friendly and helpful.
Get in touch
Latest review:
Painting & Decorating- 6 Oct 2022
Very pleased with our choice. We initially got four quotes from different builders, most of them were terrible at communicating apart from Alfred. He was very easy to work with, responsive and very careful with our brand new house. His team was hard working, tidy and fast. They completely renovated our garden from removal of old decking and gravel to setting up new fences, levelling and turfing the ground. They also removed our old kitchen, partition wall and carpet, as well as did jobs like plastering, building a wall and set up lights and shelves. We’ll surely have him back soon to work on other jobs.
Brits construction ltd
Rating: 5 out of 5
Extension Builder in Harlesden
Brits has vast knowledge & experience of residential projects and has built several Modern Loft conversions, Major Side & Rear Extensions and whole house Internal Refurbishments. We Offer; Project Management. Program of works. Regular Meetings with the client. Liaise with the local authorities. We execute Projects on time, within budget and with the highest quality. Best housekeeping and H&S Standards. Employees & Public Liability Insurances. Member of FMB, LABC, Trust Mark, NABC
Get in touch
Latest review:
Extensions- 21 Jul 2023
We had a loft conversion and a 9x3m rear extension constructed. We also had underfloor heating, flooring, a new staircase and air con installed. We are happy with the result and would recommend this company. They have also respected warranty and fixed issues that have come up after construction and decorating work completed.
Islington building services ltd
Rating: 5 out of 5
Extension Builder in Harlesden
All building work undertaken (domestic only) Our company employees 12 people and fully qualified all skill men and 6 employees they have more then 15 years experience and 4 employees more then 10 years experience and 2 employees more then 18 years Jobs electrician and plumbeing and plastering and Joiner or Carpenter and Bricklay and roof .tiling (specialist kitchen and bathroom)
Get in touch
Latest review:
Kitchen Fitting- 12 Sep 2021
Hassan and his team were excellent and worked really hard to complete my kitchen. I would recommend them to anyone. Thank you Hassan and team.
HEXAFORM CONSTRUCTION LIMITED
Rating: 5 out of 5
Extension Builder in Harlesden
HEXAFORM is a London based multi-disciplinary design and build company that has the experience, work ethic, communication tools, and systems in place needed to bring any scale project from a virtual blueprint to reality. Historically the architect-contractor relationship has been one of an ‘us versus them’ mentality. But we’re 'both'. Having a design team under the same roof as a construction company means that the eccentricities of each project are rendered opportunities, rather than obstacles.
Get in touch
Latest review:
Architecture- 12 Jun 2023
Lots of ideas, step by step explained. Easy to work with. Highly recommend
BDS TM Limited
Rating: 5 out of 5
Extension Builder in Harlesden
FULL REFURBISHMENT ,HOUSE EXTENSION AND LOFT CONVERSION SPECIALIST,PAINTING, ELECTRICAL&PLUMBING
Get in touch
Latest review:
Electrical- 18 Apr 2020
Ben fixed my lights and electrics in garden. He took his time and was punctual. Hes very helpful and resonable. i was very happy with his work, i would recomend him to anyone what a nice man.
Handpconstruction ltd
Rating: 5 out of 5
Extension Builder in Harlesden
H & P Construction is a Property renovation and maintenance company based in London, United Kingdom covering Greater London. With years of experience in the industry, our team has successfully delivered many projects for domestic and commercial properties, with clients ranging from home owners to tenants to business owners. At H&P Construction, we are committed to providing a great service to all of our clients. We understand that maintaining a property can be a hassle, which is why we offer a full suite of services to keep your property in top condition. From routine maintenance to more extensive repairs, our team of experts has the skills and experience to handle any job, big or small. We are passionate about delivering exceptional results and ensuring that our clients are completely satisfied with our work. Our goal is to make property renovation as simple and stress free as possible, so the client can focus on the things that matter most to you.
Get in touch
Latest review:
Carpets & Lino- 12 May 2024
Amazing job so far so professional

4.2

Top rated Extension Builders

Our Extension Builders in Harlesden, are rated 4.2 out of 5 based on 21 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.