Extension Builders in Walham Green

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 reviews)

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Some of our top rated extension builders in Walham Green

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F&G Design and Build ltd
Rating: 5 out of 5
Extension Builder in Walham Green
With a solid foundation of 15 years in the construction industry, our company has established itself as a beacon of excellence and reliability in transforming spaces Specializing in loft conversions, extensions, general building work, and renovations, we take pride in our ability to merge innovative design with impeccable craftsmanship.
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Latest review:
Bathroom Fitting- 14 Jun 2026
From start to finish, Darren and Aldi were completely professional and we are really happy with the finished result. They made design suggestions to help us make choices based on their vast experience and worked positively with us. The work was completed skilfully and with care. We would definitely recommend them without hesitation.
Peter Build
Rating: 5 out of 5
Extension Builder in Walham Green
We offer professional service for all your local building requirements. With our team of professionals no job is too small or too big to handle. From Small Brickwork jobs to large extension work, we can do it. Our team of professionals have years of experience and know-how to carry out all jobs to the highest quality without charging extortionate prices.We are a small friendly local Builders with over 20 years experience!
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Latest review:
Bathroom Fitting- 5 Nov 2019
I met up with Peter, told him what needed doing and he provided a detailed quote within days. I handed over a set off keys and basically left him and his team to get on with it! This was a time restricted job, he purchased all the material and provided all the receipts. I returned a week later to find the job completed to the highest standard surpassing my expectations. I will definitely be working with Peter again in the future and I would highly recommend him.
Complete Construction london
Rating: 5 out of 5
Extension Builder in Walham Green
At Complete Construction we have a complete team to undertake all building and renovation works.We have been trading over 12 years,and forever growing.Priding ourselves on reputation and reviews and can offer plenty of references from recent clients.Having been known to have the team you want on your project,we are now being prided on our unbelievable Painting and decorating team
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Latest review:
Restoration & Refurbishment- 16 Jun 2023
Amazing job by Ross and his team! They're easy to deal with and the job was completed on time and to budget :) Will definitely use again! Thank you so much!
Towergate Design
Rating: 5 out of 5
Extension Builder in Walham Green
Towergate Design Studio is a London-based leading practice working in the residential and commercial sector. We have a reliable and excellent painting team with reputation for high-quality work, attention to detail, professionalism, including punctuality, clean communication and using quality materials. We are the A turnkey company provides a service from design to the final, fully functional and innovative building projects . We handle all aspects of a project, including design, engineering, procurement, construction, and installation.
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Latest review:
Painting & Decorating- 8 Jan 2026
Great job done - Bulent was quick to communicate and efficient in getting everything finished. He was careful to ensure a high standard of finish and I am very happy with the result. He even did extra bits like sealing our bathtub on top of the painting requested.
Bellamont Consultancy Ltd
Rating: 3 out of 5
Extension Builder in Walham Green
Welcome to Bellamont Consultancy Ltd Where quality craftsmanship meets reliable service, As a medium sized building company, we specialize in delivering projects that combine technical expertise, attention to detail and a commitment to customer satisfaction. Our team brings together skilled tradespeople, experienced project managers and innovative designers to handle a diverse range of construction needs, from residential homes to small commercial buildings and renovations. We pride ourselves on building strong relationships with clients, partners and the communities we serve Every project big or small receives our full dedication and commitment to quality standards. Our clients appreciate our hands on approach and transparent communication, ensuring a smooth and collaborative building experience At Bellamont Consultancy Ltd we are passionate about turning visions into solid structures, on time within budget and to the highest standards
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Latest review:
Carpentry- 30 Sep 2025
Wall panelling installed on time and on budget. Great job.
Extension Kings Ltd
Rating: 5 out of 5
Extension Builder in Walham Green
I've been working in building trade for over 20 years , I can undertake any job small and big from foundations to the roof and anything between. I can provide any references and I have insurance of £5 million. Me and my team take pride at what we do and we do it first time right .our work is second to none , and proof of that is that you don’t pay anything upfront till you are fully satisfied with the quality.
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Latest review:
Extensions- 8 Oct 2018
Alban completed a lateral kitchen extension for me in west London. Very happy with the results and to add my name to others that have given 100% positive feedback. What I particularly liked - (1) Alban took great care to protect the rest of my house while working (protection, covers etc), (2) his team were friendly and polite to neighbours. Building works are always noisy and disruptive, they kept others 'on side' and (3) they worked to the timing and schedule agreed (4) they cleaned up, every single day (5) they worked to a high standard and corrected for any issues, despite my inevitable last minute changes. Wish him and team best success... happy to recommend. Rob
Victor & Co.
Rating: 5 out of 5
Extension Builder in Walham Green
Victor & Co has operated throughout London successfully for over twenty years. We are determined to maximaze our customer’s satisfaction by fulfilling their wishes to their specification, rather than forcing a compromise. Our team is build up of successfully from disparate areas of the trade and together we have all the skills necessary to successfully carry out any work asked for us. We do have flexible approach to many issues ready to find solutions to most difficult matters.
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Latest review:
Extensions- 9 Nov 2021
I had a great experience hiring Victor & Co. They built a Rear Garden Extension in my house with excellent standards and finishing. Also they have done everything on time, which I know is quite difficult. I met Victor, the director of the project, every week to discuss the progress and any alterations to the original plans. He was great at explaining all the options and delivering the work. All the builders were very polite and you could see that they were very well organised with all the tools and building materials they brought to the house. When there were minor delays they were happy to come on weekends to catch up with the programmed finishing time. For the level of noise you could expect a building site can generate they were incredibly quiet. Last and not least, the quote I have from them was one of the most competitive ones I found in the market, so I can definitely recommend this company to anybody that is planning a big project.
KBS London Ltd
Rating: 5 out of 5
Extension Builder in Walham Green
We are a North London Carpentry and General building company. I am a Qualified Carpenter from New Zealand, I have 30 years experience with 20 in London. We can carry out all works on residential, retail and commercial projects, from strip out to completion. We have a network of tried and proven tradesmen and suppliers. We are Quick Clean happy to work out of hours if necessary. I will do you a free quotation and happy to discuss works and guide you if necessary. Karl
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Latest review:
Carpentry- 8 Jun 2026
Responsive and good communication - delivered the job as planned and quoted. Would recommend.
Vadym Kutsak
Rating: 3.7 out of 5
Extension Builder in Walham Green
I have 7 years in basement, underpinning, extension. Was working at company "Hughes design&build" Have good knowledge in job
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Latest review:
Groundwork & Foundations- 30 Mar 2026
Vadym did a very professional job. He is a good communitcator , and left the site clean and tidy.
Property DMR Services Ltd
Rating: 5 out of 5
Extension Builder in Walham Green
Property DMR Services Ltd is a high end building company that specialises in refurbishing high end properties in and around London. All our work is insured & guaranteed. We undertake Basement Construction & Waterproofing, Extensions, Loft Conversions & Renovation, Decorating and wallpapering plus Bespoke Joinery & Shop Fitting
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Latest review:
Restoration & Refurbishment- 12 Sep 2024
From the first impression, throughout the early stage discussions and right up to the end - Matthew was consistently punctual, fair, thorough and reliable. Excellent execution of jobs and flat was left tidier than before. Would not hesitate in hiring him again or recommending.
AK Electrical Services
Rating: 5 out of 5
Extension Builder in Walham Green
AK Electrical services is part of Crest Construction & Interiors Ltd. We carry out full building works from foundation to the roof. We are specialised in basement and underpinning works. Our trade people are fully qualified and we work to the highest standard. We have many years experience in domestic electrical and commercial installation. We provide electrical services for all domestic/ commercial projects. We are registered in ELECSA PART P SCHEME, 17th edition. All works are guaranteed.
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Latest review:
Fully electrify a new rear, 2 storey side, porch extension and shed. Arek was always the first one on site, worked very professionally, interacted well with the other builders and was happy to accommodate minor changes to the project. He suggested improvements to the the lighting layout and configuration were taken aboard. I highly recommend him and I'll also be using him to change my house consumer unit in the coming weeks.
Dimitrios Spanos
Rating: 3.7 out of 5
Extension Builder in Walham Green
KDG Building & Consulting Services is specialist in all aspects of general building and property maintenance, extensions, loft conversions, structural waterproofing and painting and decorating related works for both private and commercial Clients in Central and Greater London. We take pride in our bespoke building services and make sure every project is nothing less than what our Clients will expect, driven by our values to deliver long lasting and high standards results.
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Latest review:
Tiling- 28 May 2020
Did not arrive to complete the job or have the professionalism to cancel in advance. Unreliable company.
Krots
Rating: 5 out of 5
Extension Builder in Walham Green
Wood carpenter for doors, external rooms, ceilings, stairs, bedrooms, kitchens, railings and gardens
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Latest review:
Carpentry- 28 Sep 2025
Great handywork,
Yida Design and Construction Ltd
Rating: 5 out of 5
Extension Builder in Walham Green
Yida Construction is a limited company based in Central London. We are a very reliable and professional team of tradesmen with over 10 years of experience in the building industry, committed to delivering the highest levels of quality and service to our clients.
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Latest review:
Restoration & Refurbishment- 26 Jun 2022
Tommy was a wonderful perfectionist and has done beautiful work in our stairway and hallway which had needed refurbishment for a very long time. It feels brand new. The flooring is perfect both in the hall and staircase, and the walls are now perfectly smooth and painted immaculately. Friendly and accommodating, we will be hiring again for more jobs in the future, undoubtedly. Thank you.
Fastway Constructions Limited
Rating: 5 out of 5
Extension Builder in Walham Green
At Fastway Constructions, we are dedicated to redefining the construction industry through sustainable practices and innovative solutions. Based in the United Kingdom, we pride ourselves on delivering exceptional quality and reliability across four key sectors: Residential Constructions, Commercial Constructions, Industrial Constructions, and Renovation & Remodelling Here at Fastway all of our employees are fully qualified, skilled and very experienced building contractors that have worked on hundreds of projects over the years resulting in 100% client satisfaction, full job completion on time, and always well within budget. All employees hold cscs cards for their relevant trades along with health and safety certificates and first aid for a competent safe worksite at all times. We are a building contractor with a professional approach to all our projects. We offer a seamless and multi-trade service, for all domestic projects from new builds, extensions, loft conversion, renovation to fully finished houses, all tailored to meet our clients’ specific requirements.
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Latest review:
Plumbing- 1 Aug 2025
Jitin did a good job in finding a solution to the leak in the washing machine drainage pipe. He used his experience in problem solving and fixed the issue. Thanks Jitin
Good Choice Builders LTD
Rating: 5 out of 5
Extension Builder in Walham Green
We are the building company that specialized in Loft Conversions, Extensions and Refurbishments. By this moment we worked as a subcontractors, now we have all neccessary and feel free to participate to the tenders, prepare the informative and detailed contracts and estimations, management.
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Latest review:
Extensions- 8 Jul 2019
A very efficient builder who did the plans which where passed first time when we needed help he found someone to help very clean and tidy and on time

4.2

Top rated Extension Builders

Our Extension Builders in Walham Green, are rated 4.2 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 Walham Green?

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 Walham Green 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 Walham Green who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Walham Green?

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

Find extension builders in Walham Green with MyBuilder

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

Step 2: Compare different extension builders in Walham Green

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

Step 3: Hire Walham Green extension builders with confidence

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

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

What to ask a Walham Green extension builder before hiring?

Before hiring an extension builder in Walham Green or extension building company in Walham Green, 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 Walham Green?

An extension builder in Walham Green 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 Walham Green 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 Walham Green?

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 Walham Green 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 Walham Green 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 Walham Green

Can an extension builder in Walham Green help with planning permission?

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

Many Walham Green 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 Walham Green help with materials and finishes?

Yes, most extension builders in Walham Green 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.