Extension Builders in Harlesden

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (20 reviews)

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Some of our top rated extension builders in Harlesden

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TM Building Constructors Ltd
No reviews yet
Extension Builder in Harlesden
Flat roofing, Roof Tiles. Extensions.Loft conversions. Patios. Paving. Garage conversions
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Keystone Building Company Limited
No reviews yet
Extension Builder in Harlesden
I'm an Australian builder who has worked & run my building company for over 20 years in the UK. As a company, our main goal is client satisfaction & a uncompromising attitude to quality of finish, which is the driving force behind the success of our business, no matter what size or budget we are working with. As a company, we can facilitate all kinds of work, large or small; from decorating, kitchens, bathrooms, carpentry etc. through to complete property refurbishment, extensions, lofts & basements.
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Building&Maintaining
No reviews yet
Extension Builder in Harlesden
All types of groundworks, plus repairing,painting and decorating properties.
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JP Builders
No reviews yet
Extension Builder in Harlesden
I have been a bricklayer for over 30 years. I am always on time, work effectively and like to engage with the customer to ensure a good end result.
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Sandhu Boyz
No reviews yet
Extension Builder in Harlesden
I have a skill of all building work like plumbing electrical flooring painting loft conversion extension new bath work garage etc.
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Hr Construction
No reviews yet
Extension Builder in Harlesden
The best preparation for tomorrow is doing your best today.
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Alket Hysa
No reviews yet
Extension Builder in Harlesden
My name is Alket. With 15 years of hands-on experience in the plastering, rendering and screeding industry i have honed my skills to deliver exceptional quality. Plastering:Expertise in applying various types of plaster,includin lime,gypsum and cement, to create smooth and durable finishes. Rendering:Proficient in different rendering techniques,including traditional sand and cement render, monochouche and acrylic render system. Screeding:Skilled in laying both traditional sand and cement screed and modern liquid screed to achieve level floors with precision.
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AGDESIGN-BUILD.LTD
No reviews yet
Extension Builder in Harlesden
Architectural services Structural Engineering Services
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JMG Brickwork
Rating: 5 out of 5
Extension Builder in Harlesden
Fully qualified bricklayer with 16 yrs+experience in bricklaying,I don’t just work on my builder, my main work is for builders in my area and word of mouth recommendations. free quotes for local areas. All Bricklaying works undertaken from new build, extensions, garden walls,porches,anyting with bricks and blocks! Also repairs and repointing from birds beak,bucket handle and weather struck my aim is always to deliver a high quality finish and to the customer’s satisfaction!! please contact for a free quote ,,!!
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Latest review:
Bricklaying- 8 Jun 2024
Joe had come to our property to fix the wall. He had done an excellent job and redid the wall to a high standard. He left the area clean and tidy. We strongly recommend getting in contact with Joe for any bricklaying work. Great Job Joe!!
Foundations up
Rating: 5 out of 5
Extension Builder in Harlesden
I have been involved in the construction, civil engineering for 20 plus years. I have a great knowledge of every aspect from the ground up. I have a portfolio of past projects on request. I relish on problem solving projects, because there is always a solution there is no job that can’t be done, with my clients budget coming first so both parties are completely happy and satisfied with the time and resources available.
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Latest review:
Groundwork & Foundations- 6 Feb 2026
Quick communication, completed work as agreed at a competitive price. Recommended.
SAM DESIGN & BUILD LTD
Rating: 4.4 out of 5
Extension Builder in Harlesden
Having a wide range of experiences in designing and constructing extensions, loft conversions, alterations and new buildings with planning, structural drawings and calculation, we provide full range of service from planning and design to construction. Electrical, gas safe, plumbing and heating are also part of our wide range of services. Load bearing wall removal, chimney breasts removal, refurbishing kitchen and bathroom were also one of the most accomplished projects in last year. Look forward to hear from you.
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Latest review:
Extensions- 3 Oct 2025
Job was to convert WC in outbuilding into a full bathroom, do walls and ceiling in outbuilding to convert into an office space. Price was agreed with things planned, still with some issues towards later part of job, It worked out in the end. Overall I am giving 3-4 stars as quality of work is good. Just need to have things written down with him, and a thorough discussion on plan before commencing work and agree on payment plan. suggested to keep 20% to be paid at completion.
Adamus and Contractors Limited
No reviews yet
Extension Builder in Harlesden
Adamus & Contractors Limited We’re a friendly, hands-on building company with 10+ years’ experience, specialising in refurbishments, loft conversions and extensions. Whether you’re opening up a space, extending your home, or bringing an older property back to life, we handle everything from start to finish. We’ve got an in-house architect and interior designer, so we can take care of the planning, design and build all under one roof — making the whole process a lot easier for you. From steels and structural work right through to the final finishes, we use a solid team of trusted trades and take pride in doing things properly. We’re used to working in people’s homes, so we keep things tidy, organised and running smoothly. We keep it simple: clear quotes, honest advice, and no surprises. If anything changes along the way, we’ll talk it through with you first. You bring the vision. We bring the standards. At the end of the day, we just focus on doing a proper job and leaving you with a space you’re genuinely happy with.
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Simonmastermfp
No reviews yet
Extension Builder in Harlesden
Hi My name is Szymon and I have many tears of experience in the profession 14 years. I am responsible person who will do the work accurately and cleanly.I have references and photo of the wirj performed. I am waiting g for proposals for cooperation.
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Mannatconstruction
No reviews yet
Extension Builder in Harlesden
we strive to provide 100% quality fitting bathrooms and ensuites.with over 10 years experiance in renovating bathrooms we give the customer our personal vision and provide total stress free renovation and aim to complete all projects on time as quoted in quotes. we install wet rooms and and lighting to customers preferred project,so give us a go and share your vision.
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F&E Contractors Ltd
No reviews yet
Extension Builder in Harlesden
Hi I’m Florian if you need a fence fixed or your house painted I’m the guy you need with 7 years of experience contact me for free quotations and advises.
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k+c studio
Rating: 5 out of 5
Extension Builder in Harlesden
udrtzurtszesrtz
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Latest review:
CAD / Drawings- 5 Dec 2021
So far so good very helpful and would use her again very professional

4.2

Top rated Extension Builders

Our Extension Builders in Harlesden, are rated 4.2 out of 5 based on 20 reviews from customers like you.

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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.