Extension Builders in Thornton Heath

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (19 reviews)

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

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 Thornton Heath

3047 Results

Sort by:

Simranjit Singh
Rating: 5 out of 5
Extension Builder in Thornton Heath
All type of construction work. Loft and extension.
Get in touch
Latest review:
Carpentry- 13 Jun 2026
Easy , fairly priced and good work. Thank you. Will be calling for future jobs.
property hospital
Rating: 3.7 out of 5
Extension Builder in Thornton Heath
Hope all is well. Property Hospital London is a property maintenance and refurbishment company. We understand the importance of communicating, time keeping and executing jobs at hand. Over the years we have evolved to give a hands off approach and take the stress away from day to day maintenance work.
Get in touch
Latest review:
Tiling- 1 Oct 2022
Highly recommended, will use again. Very professional, reliable and knowledgeable. He was very reasonably priced and flexible. Super happy.
Buckland Building Contractors (S.E.) Limited
No reviews yet
Extension Builder in Thornton Heath
Buckland building contractors carry out all aspects of construction; ranging from bathrooms to new build houses. We specialise in extensions and offer a full service from start to finish. We offer a clean and reliable service and pride ourselves on our customer relations.
Get in touch
Vkjengineers
No reviews yet
Extension Builder in Thornton Heath
Hi I am civil engineer worked in lot of projects in London Including groundwork’s, drainage,foundation,under pinning, Paving &drive way etc, I had few lads work for me.
Get in touch
Edelweiss Construction Ltd
No reviews yet
Extension Builder in Thornton Heath
Loft conversion, extension and refurbishment specialist.
Get in touch
Ashcottconstruction limited
No reviews yet
Extension Builder in Thornton Heath
We are a family run business based in Wimbledon, with over 30 years experience in the industry serving South West London and Surrey. We specialise in extensions, refurbishments, loft conversions, garden renovations including: patios, garden rooms and resin bound drives. Our electrical team is NICEIC registered with experience in all aspects of domestic and commercial installation.Our plumbing and heating team are Gas Safe registered with knowledge of pressurised and conventional heating systems.
Get in touch
Donaghy & Ross Construction
Rating: 3.7 out of 5
Extension Builder in Thornton Heath
At Donaghy&Ross we believe on delivering only the highest quality of work to ensure are clients get the best possible service, with 16 years of experience and NVQ qualifications in brickwork we have the right team to do the right job.
Get in touch
Latest review:
Bricklaying- 12 Nov 2016
Dear Brian I have tried to contact you on several occasions to complete the job. I really do not wish to leave negative reviews all over the Internet. Will you get in touch? Just ignoring the situation will not go away as I am now in receipt of your insurance documents and want to resolve amicably. I put you on notice to get in touch within 7 days. If I do not hear back I'm afraid I will have to start the legal processes as you give me no other option. I hope to hear from you within the allotted timeframe and do hope we can avoid litigation in this circumstance. Thank you. Dawn
DTK Construction Limited
No reviews yet
Extension Builder in Thornton Heath
We are specialists in loft conversions and extensions and we also undertake full refurbishments.With over 20 years experience in the construction industry. Your project is in safe hands! We are devoted to maintaining high standards of work.
Get in touch
Bogdan Pana
No reviews yet
Extension Builder in Thornton Heath
TOP QUALITY MAINTENANCE & CONSTRUCTION delivers internal and external works, adapted to our clients’ needs and specifications, providing top quality maintenance, refurbishment and repairs, all work being executed by our skilled and experienced team of technicians.
Get in touch
Fixer/dryliner
No reviews yet
Extension Builder in Thornton Heath
Professional wall/ceiling fixer dryliner with 5 year experience
Get in touch
All in one builders
Rating: 5 out of 5
Extension Builder in Thornton Heath
At All In One Builders we take pride in being your trusted partner for all your construction needs. With a wealth of experience and a commitment to excellence, we specialise in a wide range of building services tailored to meet your unique requirements.
Get in touch
Latest review:
Akash made sure the job was complete exactly how he said it would be, he provided reliability during the installation of our kitchen and answered all questions very professionally. The builders were well aware of the conversations my mother and I had with Akash and so put our mind at ease. The installation itself was very quick (the tear down was very much completed in a few hours) and installed over the weekend. They were very hygiene aware and set up a cover between the kitchen and the rest of our house and didn’t disrupt our home living. They cleaned up before they were gone to very high standards without us even asking them too, all I’m sure is due to Akash’s excellent organisation skills.
surrey carpentry ltd
No reviews yet
Extension Builder in Thornton Heath
all aspects of carpentry work undertaken and completed with high attention to detail. due to 8 years experience on the job had many different tasks to accomplish. including doors, kitchens, roofs, built-in wardrobes or even general builders works undertaken like building outhouses, gazebos and other timber -framed buildings.
Get in touch
Geo Way Limited
Rating: 5 out of 5
Extension Builder in Thornton Heath
The "Geo Way Limited" is trustful FMB member construction company with professional experienced team with all required qualifications & DBS checked; we undertake works listed below: - Brickwork - Extension works - Loft conversion - Interior Designing - Kitchen & Bathroom installation - Decorating - Flooring - Bespoke joinery - Carpentry - Plastering - Dry-lining
Get in touch
Latest review:
Kitchen Fitting- 19 Sep 2021
Zaza of Geo Way's Ltd was such a nice person to work with. As an individual who doesn't have a clue about building work and where to get materials he helped throughout. I didnt feel taken advantage of at all. Very professional people to work with. I would given them 10/10. Thank you Zaza and team.
GK Developers Ltd
No reviews yet
Extension Builder in Thornton Heath
GK Developers is a specialist Design & Build company delivering high-quality extensions, loft conversions, refurbishments and full-home renovations across South West London & Surrey. After 10+ years of working on multi-million-pound structural and residential developments in London, including high-rise RC frames and complex engineering-led projects. Our team saw a gap in the residential market: Homeowners were struggling to find builders who deliver big-project quality, clear communication and reliable project management. So we brought our expertise into the residential sector to raise the standard. Today, every project we take on benefits from the same level of precision, planning, safety and craftsmanship demanded on large construction sites. Our in-house team includes a chartered structural engineer and interior designer, allowing us to manage the entire process from concept and planning to structural works and final finishes. We specialise in: • Single & double-storey extensions • Loft conversions & dormers • Full property refurbishments • Kitchen transformations • Open-plan structural alterations • Landscaping and outdoor works What sets us apart: • Major-project professionalism applied to your home • Transparent communication & accurate pricing • Dedicated project management • Premium workmanship and attention to detail • Design, structure & build handled by one expert team If you want a team that treats your home with the same care and quality as a multi-million-pound project, we’re the perfect fit. Message us today and let’s bring your vision to life.
Get in touch
JIMGOS Maintenance LTD
Rating: 4.4 out of 5
Extension Builder in Thornton Heath
Jimgos Maintenance Ltd is a London-based property maintenance company delivering reliable, high-quality services across a wide range of trades. We specialise in residential and rental property works, supporting homeowners, landlords, and managing agents with both reactive and planned maintenance. * Gas & heating – boiler installations, servicing, gas safety certificates (CP12), heating system repairs * Plumbing – leak detection, pipework repairs, bathroom installations, drainage solutions * General building & refurbishment – tiling, plastering, painting & decorating, kitchen and bathroom upgrades We understand the importance of compliance, safety, and clear communication, especially when working within tenanted properties. Our team ensures all work is carried out in line with current UK regulations and industry standards.
Get in touch
Latest review:
Central Heating- 16 Jun 2026
The job was carried out efficiently by Kwizie who was also polite, kind and honest, he spotted the issue straight away as my electric boiler stopped heating up the water. Thank you again kwizie! PS: However, The company is not one of the best, a bit pricey as he did the job only for 1 hr changing only the fuse and checked if was working properly.
Bc construction
Rating: 5 out of 5
Extension Builder in Thornton Heath
Over 10 years of experience in painting and decorating. We also carry out kitchen renovations, extensions and loft conversions and much more
Get in touch
Latest review:
Painting & Decorating- 29 Jul 2024
I found them to be very professional.

3.9

Top rated Extension Builders

Our Extension Builders in Thornton Heath, are rated 3.9 out of 5 based on 19 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 Thornton Heath?

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 Thornton Heath 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 Thornton Heath who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Thornton Heath?

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

Find extension builders in Thornton Heath with MyBuilder

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

Step 2: Compare different extension builders in Thornton Heath

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

Step 3: Hire Thornton Heath extension builders with confidence

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

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

What to ask a Thornton Heath extension builder before hiring?

Before hiring an extension builder in Thornton Heath or extension building company in Thornton Heath, 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 Thornton Heath?

An extension builder in Thornton Heath 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 Thornton Heath 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 Thornton Heath?

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 Thornton Heath 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 Thornton Heath 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 Thornton Heath

Can an extension builder in Thornton Heath help with planning permission?

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

Many Thornton Heath 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 Thornton Heath help with materials and finishes?

Yes, most extension builders in Thornton Heath 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.