Extension Builders in Greenwich

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.7 (19 reviews)

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

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 Greenwich

3271 Results

Sort by:

Iusi Stroy Limited
No reviews yet
Extension Builder in Greenwich
Iusi Stroy is a construction company based in the heart of United Kingdom, in London. We boast with an experience of more than two decades in the industry not only in UK but in Eastern Europe as well. You can definitely choose us for quality, adequate prices and fast timing!
Get in touch
B&G Brothers Construction Ltd
Rating: 4.8 out of 5
Extension Builder in Greenwich
WELCOME TO B&G BROTHERS CONSTRUCTION LTD B&G Brothers Construction Ltd is a well-established building company based in Stanmore North West London. We carry out most types of building works, including: House Extensions Property Refurbishments Loft Conversions Ground Works And all type of repairs and alterations. You can be confident in our abilities to create you that perfect home using the highest quality of materials and best possible level of workmanship
Get in touch
Latest review:
Extensions- 11 Jan 2023
Rear garden extension done with new fully refurbished old house new electric new plumbing, all work done properly and good quality, experienced builders , +++ big job done within time frame and olso garden levelling with retaining wall ! Andrei and Alex recommend!
Caush Hysa
No reviews yet
Extension Builder in Greenwich
Hi my name is Caush , I am 35 years old . I live in London since 2011 and I have been working in construction for almost 15 years. I can do roofing, extension, carpentry, first fix carpenters. I live in North London.
Get in touch
Inspired Creations London Ltd
Rating: 5 out of 5
Extension Builder in Greenwich
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.
BOTNARI CONSTRUCTION
Rating: 4.4 out of 5
Extension Builder in Greenwich
We provide a service of maximum quality and client satisfaction . Having over 25 years experience in the field we have completed jobs big and small to the best standard .
Get in touch
Latest review:
Electrical- 26 Jul 2026
Genuinely one of the worst builders we have come across. David rewired the flat and Stefan plastered the hallway. David is NOT qualified as an electrician and cut corners wherever he could. David leveraged us for money mid job and in the end left the job without finishing and without providing a certificate. David ran cables behind door frames (awful idea), got the cheapest material, forgot where holes were for spotlights and switches among many issues which meant we had to constantly ask our builders to fill the holes and make good. Stefan did the hallway plastering without putting on mesh. The plaster cracked within 2 weeks and the paint keeps cracking and will be a constant problem. When asked to come back and fix the issue - he point blank refused. They were the cheapest quote but we really hope we had gone to someone else
Nick
Rating: 5 out of 5
Extension Builder in Greenwich
With 14 years experience in construction I undertake all kind of jobs: built, repairing and maintaining. I'm a reliable and a good communication person. Delivering great results within the planned time frame and budget is at the basis of what we do. We work closely with our clients, providing advice, discussing alternatives and taking on responsibility for the execution of all activities. We arrange orders, deliveries and returns of materials.
Get in touch
Latest review:
Carpentry- 26 May 2024
Nick is fantastic and a highly skilled professional. I am very happy with his work. He communicated very clearly. He understood what I wanted and the end result went above and beyond my expectations. I am so happy I’ve found him and definitely using him for future work!
BRIDGE HOUSE BUILDING CONTRACTORS LTD
No reviews yet
Extension Builder in Greenwich
We mainly do residential refurbishment, extensions, loft conversions, factories, cold storage and other related building works. Our employees and building contractors are fully qualified with hands on work with years of experience. A lot of our work is carried out in local community areas.
Get in touch
JC Group Property Sevices LTD
Rating: 5 out of 5
Extension Builder in Greenwich
JC Group Ltd is a reliable and experienced building company offering bathroom installations, plumbing, home extensions, and general building works. With over 30 years of combined industry experience, we take pride in delivering high-quality workmanship, clear communication, and projects completed on time and within budget. We are committed to customer satisfaction and maintaining the highest standards on every job, no matter the size.
Get in touch
Latest review:
We’re absolutely delighted with the extension and the overall experience from start to finish. The workmanship is to a very high standard, and everything was completed professionally and on schedule. Communication throughout the project was excellent, and we were kept informed at every stage. The team were reliable, tidy, and respectful of our home, and the finished extension has exceeded our expectations. We wouldn’t hesitate to recommend them to anyone looking for quality work and a stress-free build.
Unique build
Rating: 5 out of 5
Extension Builder in Greenwich
Welcome to unique build we offer the full building and maintenance package covering all your building needs. Established in 2020 we are a new company but with a group of highly skilled tradesmen with attention to detail and taking pride in what they do giving you the best service possible. We are competitively priced and always happy to help.
Get in touch
Latest review:
Restoration & Refurbishment- 26 Nov 2020
Scott turned up on time to quote; arrived when he said he would; kept me fully informed and completed the job to time and to the standard expected. Can't ask much more from a tradesman than that. I would use Scott again.
EC construction
New on MyBuilder
Extension Builder in Greenwich
👷‍♂️ About Us – Professional Plastering Services Welcome to EC Construction your trusted choice for high-quality plastering and finishing services. We are a professional, reliable, and hardworking team with years of experience delivering excellent results for homeowners, landlords, and businesses. Our team takes great pride in our attention to detail, clean workmanship, and professional service. From full room skimming and plasterboarding to repairs, rendering, and smooth finishes, we make sure every job is completed to a high standard. ⭐ Why choose us? * Highly skilled and experienced plasterers * Excellent attention to detail * Reliable and professional service * Clean and tidy workmanship * Competitive prices * Customer satisfaction is our priority * Amazing feedback and recommendations from our clients We believe that our reputation is built on the quality of our work and the trust of our customers. We don’t just complete a job — we leave our clients with a finish they can be proud of. 📞 Get in touch today for a free quote and let us transform your walls and ceilings!
Get in touch
ritz builders uk ltd
Rating: 5 out of 5
Extension Builder in Greenwich
Ritz Builders UK Ltd can take care of any property renovation or house extension, from complex double basement developments to a new builds. Our builders have worked on various type of properties across UK, giving them a new light and converting them into modern and contemporary living spaces. Our professional construction team, who come supported by a dedicated workforce, are well regarded by commercial and residential property developers.
Get in touch
Latest review:
The builder was reliable and dependable. Work was neat and to taste .
E&E Building
No reviews yet
Extension Builder in Greenwich
I am a skilled and reliable tradesperson with hands‑on experience across a wide range of construction and home improvement services, including bathroom fitting, brickwork, gardening, extensions, and general building work. With a strong focus on quality, safety, and customer satisfaction, I take pride in delivering professional results that stand the test of time.
Get in touch
Mng Roofing Ltd
Rating: 5 out of 5
Extension Builder in Greenwich
Welcome to Mng Roofing Ltd – Your Local Roofing & Building Experts With over 20 years of experience, we’ve built a reputation across London and surrounding areas for reliable, high-quality construction and roofing services. Every job is handled by our trusted in-house professionals — we’re here to protect and enhance your home with care and precision. We specialise in: 👉 New Roof Installations – flat and pitched roofs in slate, tile, felt, bitumen, and modern PVC membranes. 👉 Roof Repairs & Maintenance – from small leaks to major refurbishments. 👉 Fascias, Soffits & Guttering – installation, replacement, and professional cleaning. 👉 Garage & Extension Roofs – tailored solutions for outbuildings and home extensions. 👉 Leadwork & General Roofing Services – high-quality lead flashing, detailing, and associated building work. 👉 Extensions – full design-and-build services to increase your living space and add value to your property. 👉 Loft Conversions – transforming unused lofts into bright, functional rooms while ensuring Building Regulations compliance. 👉 Outhouses – bespoke garden buildings designed and built to suit your needs, from offices to relaxation spaces. Whether you're dealing with a leak, planning a renovation, or considering a full extension or conversion, we tailor our work to suit your property and budget. We’re proud to offer honest advice, expert craftsmanship, and guaranteed results. When you choose us for your project, you’re not only getting skilled workmanship — you’re also fully protected by comprehensive insurance cover: ✅ Employers’ Liability (£10 million): Protects our team while they work on your property. If any of our staff are injured, you’re never at risk of being held responsible. ✅ Public Liability (£5 million): Covers accidental damage or injury to third parties. For example, if a falling tile damages a neighbour’s car, you’re completely protected. ✅ Products Liability (£5 million): Ensures you’re covered if any of the materials we supply and install turn out to be faulty or cause damage. In simple terms, our insurance gives you total peace of mind: whatever happens, you’re financially protected, and your property is in safe hands. 🤝 If you're looking for a builder and roofer who values safety, quality, and customer satisfaction—let’s talk. 📞 Feel free to message me now to arrange a free site visit and no-obligation quote.
Get in touch
Latest review:
We recently had Mng Roofing Ltd carry out a new flat roof installation on our property, and we couldn't be happier with the results. From the first inspection to completion, the team were professional, reliable, and kept us updated throughout the process. The workmanship was excellent, and the site was left clean and tidy, and everything was completed on time. We now have peace of mind knowing our roof is watertight and backed by a guarantee. Highly recommend Mng Roofing Ltd to anyone needing quality roofing work done.
L R Construction
No reviews yet
Extension Builder in Greenwich
L R Construction is a family run business with nearly 40 years experience in the building industry. We take pride in our work and keeping our sites clean and tidy. Forming a great relationship with our customers making your building work as stress free as possible. All building work undertaken
Get in touch
Hillway Construction Limited
No reviews yet
Extension Builder in Greenwich
At Hillway Construction, every project begins with a deep understanding of how people live, interact, and envision their space. We deliver high-quality residential construction across London and the Home Counties, from bespoke refurbishments and extensions to full new builds, with a focus on craftsmanship, transparency, and client satisfaction.
Get in touch
K b builders
No reviews yet
Extension Builder in Greenwich
We take on all aspects of building work from small garden landscapes to new build projects, extensions and conversions, All work to high standards with a large portfolio and many happy customers,
Get in touch

3.7

Top rated Extension Builders

Our Extension Builders in Greenwich, are rated 3.7 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 Greenwich?

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

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

What are the hourly rates of extension builders in Greenwich?

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

Find extension builders in Greenwich with MyBuilder

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

Step 2: Compare different extension builders in Greenwich

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

Step 3: Hire Greenwich extension builders with confidence

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

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

What to ask a Greenwich extension builder before hiring?

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

An extension builder in Greenwich 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 Greenwich 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 Greenwich?

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 Greenwich 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 Greenwich 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 Greenwich

Can an extension builder in Greenwich help with planning permission?

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

Many Greenwich 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 Greenwich help with materials and finishes?

Yes, most extension builders in Greenwich 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.