Extension builders in Smithfield

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.5 (16 reviews)

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Some of our top rated extension builders in Smithfield

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Best London Lofts
Rating: 5 out of 5
Extension Builder in Smithfield
At Best London Lofts Ltd., we believe that your project should be kept as simple and straightforward as possible, regardless of how complex the task may seem. We have over 10 years combined experience between us in building loft conversions, garages, extensions, roofing and general building.
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Latest review:
Loft Conversion- 4 May 2025
Great service provided by this company, top quality work!! Highly recommended!
Ivory Construction and Maintenance Ltd
Rating: 4 out of 5
Extension Builder in Smithfield
At Ivory we always make sure we go out of our way to help our clients to the best of our ability, we will always advised and help out as much as we can. We have worked on many bathrooms, kitchen, refurbishments and extensions. We will always make sure our work is top quality
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Rose and Stone Limited
Rating: 5 out of 5
Extension Builder in Smithfield
Whether it is an extension or large-scale scheme, we take dignity in taking the client’s vision through to delivering a quality project at the right time and cost. This is made possible by the company being excelled by a Chartered Architect with broad construction experience and a fine eye for detail. A valuable understanding of both traditional and modern techniques along with a firm grasp of materials enables us to provide the client with opportunities to make their concepts a reality.
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Latest review:
New Builds- 7 Jun 2022
Sohail worked closely with me on this project. Providing detailed costings, work schedules and build timelines. Filling my knowledge gaps with his extensive experience he was able to assist over and beyond what I expected from him. Unfortunately due to circumstances out of my control this development project didn’t go ahead. However when the next opportunity for a new build comes up I will definitely be using Rose and Stone. I did have another job going at the time where the other builder badly let me down and left me with a big problem on my hands…. Sohail and his team stepped in and took on the project. The team finished the job exceptionally well, which was a full on top to bottom conversion, some internal reconfigurations and with the addition of a loft and new downstairs WC. The workmanship and overall quality of the job was excellent. My wife is over the moon with the results, taking the house from a three bed one bathroom to a four bed 3 bathroom house. We would definitely recommend Rose and Stone for this type of extensive refurbishment/loft conversion work and look forward to working with them in the future on bigger development projects.
Blueprint Builder UK
Rating: 4.4 out of 5
Extension Builder in Smithfield
I’m a local builder with over 25 years of experience, specialising in high-quality brickwork and home extensions. From start to finish, I take pride in delivering reliable, professional service and strong attention to detail. Whether it’s a full extension, garden wall, or any kind of brickwork, every project is completed to the highest standard. Customer satisfaction and honest workmanship are at the heart of what I do.
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Latest review:
Conversions - General- 3 Apr 2026
I originally left Stuart a five star review because the workmanship and communication were excellent, and I booked him to return to complete the internal works on our extension. After paying a deposit, the work was due to start on 27 June, but Stuart never turned up and stopped communicating. His partner later asked if I could delay the work for a few months because he couldn't contact me. When I explained I couldn't wait and politely requested my deposit back, I was blocked. I have now been left with no option but to take him to the Small Claims Court to recover my money. It's a real shame because the original work was of a high standard, but I cannot recommend someone who takes a deposit, fails to return, and then ignores all communication.
Mama jones industries
No reviews yet
Extension Builder in Smithfield
We’re a reliable, full-service construction company built on quality workmanship, honesty, and pride in every job we deliver. From start to finish, we handle it all — with a particular specialism in loft conversions, bathroom installations, plumbing work, and complete home improvements. What sets us apart is our people. Our team of experienced, skilled, and genuinely friendly tradesmen and women bring not only technical expertise, but professionalism, charisma, and respect into every home we work in. We believe great results come from clear communication, attention to detail, and doing things properly — no shortcuts. We’re known for being on time, transparent, and fair with our quotes, so there are no surprises along the way. Every project is approached with care and precision, ensuring the final result meets — and often exceeds — our clients’ expectations. Whether it’s transforming unused space into a beautiful loft, creating a modern bathroom, or taking care of essential plumbing work, we treat every job as if it were our own home. Your vision matters, and we’re committed to delivering results to your perfection.
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GUANGDONG GEKE ELECTRONIC TECHNOLOGY CO., LTD
No reviews yet
Extension Builder in Smithfield
We are a solar photovoltaic panel manufacturer in China. We design, supply and PM renewable energy project worldwide for customers requested. Kindly drop us email at geket@yahoo.com for further discussion. God bless you
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Jwolfconstruction ltd
Rating: 5 out of 5
Extension Builder in Smithfield
My name is George and I'm running J Wolf Construction building company. I can provide a lot references from happy customers in sw London.
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Latest review:
Extensions- 26 Nov 2019
Great on delivery, good on project management....rate them very high on integrity and transparency
NORDBRIT CONSULTANCY LTD
No reviews yet
Extension Builder in Smithfield
If you want to work with an experienced company in home renovation and repairing, you are in the right place.
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Dizzain Ltd
Rating: 5 out of 5
Extension Builder in Smithfield
The multi trader with excellent skills and consistently good in work performance. If you need help with your house project, such as internal structural changes, rear extensions, loft conversions or any other house structural issues, please don't hesitate to contact. Happy to help and discuss suitable solutions regarding structural design, and to comply with building regulations. A fair and good fees.
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Latest review:
We used Andrius recently and were very happy with the service. Inspected our house and spent a lot of time discussing everything in detail. He completed the drawings very quick and communication was good. Good value for money. He even helped amending something later on as needed. Thank you!
GEOMETRIS LIMITED
No reviews yet
Extension Builder in Smithfield
Geometris is a construction company, founded on 2013 and based in London. We usually undertake construction works with contracts between £15,000-£2,000,000. Our team has very experienced builders, concrete workers, electricians, RIBA Architects and engineers, which allow us to undertake a large range of design and construction projects. We can deliver work of great quality in very short notice, with respect to each client needs.
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Crown builders & landscaping
Rating: 5 out of 5
Extension Builder in Smithfield
Crown Builders and Landscaping are new to this platform: please check out our reviews on yell: we have a positive reputation, with several positive reviews on yell and other platforms highlighting their work in paving, driveways, and landscaping. reviews mention efficient service, good communication, and high-quality work, particularly in all aspects of roof repair and maintenance and new driveways and garden transformations.our punctuality, cleanliness, and reasonable pricing is our main goal and always try to achieve 100% customer satisfaction
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Latest review:
Damp Proofing- 24 Oct 2026
Great guy came when he said he would and is carrying out the job just as I want Would highly recommend
CIRCLELETTINGs london limited
No reviews yet
Extension Builder in Smithfield
an experienced builder with good knowledge of building, plastering, tiling job
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Peter Build
Rating: 5 out of 5
Extension Builder in Smithfield
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.
THE AAKTR GROUP LTD
No reviews yet
Extension Builder in Smithfield
At Aaktr Developments we formulate bespoke design & construction. Residential Properties: From design to refurbishment elegant, tailored homes that blend style, functionality, and innovation. Commercial Spaces: Designing and refurbishing sophisticated offices, vibrant cafes, and standout restaurants that reflect the unique identity of our clients. Churches: Preserving heritage and enhancing functionality through thoughtful redevelopment. Concept Design: Bringing your ideas to life with innovative and inspiring design concepts that set the foundation for your project. Full Architectural RIBA Services: Comprehensive architectural planning and design, adhering to the highest standards of the Royal Institute of British Architects (RIBA). Full RIBA/Construction Services: From initial planning to final construction, we deliver bespoke, high-quality solutions, ensuring every detail is crafted to perfection and on time.
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NW London Contracts Ltd
No reviews yet
Extension Builder in Smithfield
Dear valued customer We would like to thank you for shortlisting us and hopefully giving us the opportunity to make your home look beautiful, we have 22 years experience in constructing driveways, patios, refurbishment, extensions and alterations on residential properties across London.
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Highpoint roofing and building contractors
Rating: 5 out of 5
Extension Builder in Smithfield
At Highpoint roofing and building contractors we have over 40 years of experience Collectively, we take pride in our work to ensure 100% customer satisfaction With our free no obligation quotation you will be given all the advice you need to ensure total piece of mind our goal is to meet and exceed expectations of every customer all work carried out to the highest Possible standards and at very competitive prices
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Latest review:
Roofing (Flat)- 6 Jan 2026
Completed the job as promised and was very tidy in his job

4.5

Top rated Extension Builders

Our Extension Builders in Smithfield, are rated 4.5 out of 5 based on 16 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Smithfield?

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

Find extension builders in Smithfield with MyBuilder

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

Step 2: Compare different extension builders in Smithfield

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

Step 3: Hire Smithfield extension builders with confidence

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

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

What to ask a Smithfield extension builder before hiring?

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

An extension builder in Smithfield 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 Smithfield 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 Smithfield?

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 Smithfield 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 Smithfield 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 Smithfield

Can an extension builder in Smithfield help with planning permission?

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

Many Smithfield 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 Smithfield help with materials and finishes?

Yes, most extension builders in Smithfield 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.