Extension Builders in Blackwall

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

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Some of our top rated extension builders in Blackwall

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swift conversions ltd
Rating: 5 out of 5
Extension Builder in Blackwall
In Swift Conversions we have a mission, which is to provide the residents of Greater London with no hassle building services where all work exceeds expectations, meets deadlines and offers excellent value for money and we work very closely with our client to ensure complete customer satisfaction. We have many satisfied and returning customers because we provide the best and most comprehensive building services in and around Greater London. We pride ourselves on offering turn key projects including all permissions, certificates, planning, structure drawings and calculations. If you are looking for experienced and friendly building company you can trust then look no further than SWIFT CONVERSIONS. Whether its a query or a quote, shortlist us here and we will be in touch very shortly as soon as we have your contact details.
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Latest review:
We have worked with Alex and his team at Swift Conversions Ltd twice now—first for a house extension and then for a loft conversion and general refurbishment —and we wouldn’t hesitate to choose them again for our next project. From the moment we received the quote to the final completion, Alex was incredibly communicative, reliable, and always had a can-do attitude. Despite the challenges of fluctuating prices in the market, he delivered the project within budget and stayed true to his word. His professionalism and trustworthiness are second to none. If you’re looking for a builder you can rely on 100%, Alex is the one to go to. Highly recommended!
BUILD SAFE LTD
Rating: 5 out of 5
Extension Builder in Blackwall
Hello, We are Build Safe ltd-professional Construction Company 20 years of experience. We are proud members of Federation of Master Builders! Providing a wide range of services: Design, planning, Structural calculations, all aspects of Building works- New builds , Extensions, Loft conversions, kitchen and bathroom fitting, Window installation,refurbishments, electrical, plumbing etc. 10 years warranty and, 1m public, 5m employers liability and 1 million indemnity insurance. Please get in contact for a free quote. Thank you! Build Safe ltd
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Latest review:
Very professional. We had quite a lot of work done. It was done in time as promised, and with great attention to detail and quality. Very happy with the results. Highly recommended.
Constructional developments ltd
Rating: 5 out of 5
Extension Builder in Blackwall
We have many years of experience in the construction industry in all sectors of the building industry and provide a professional, prompt and reliable service on a comprehensive range of products from small domestic to large housing contracts across the south East.
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Latest review:
Extensions- 16 Jan 2021
Very good level of work and professionalism, would definately have James back to do more work, the job was completed with no issues and left clean and tidy.
GUANGDONG GEKE ELECTRONIC TECHNOLOGY CO., LTD
No reviews yet
Extension Builder in Blackwall
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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Nice Design & Build
Rating: 5 out of 5
Extension Builder in Blackwall
Quality general builder
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Latest review:
Decking- 16 Apr 2022
Adam is firstly a really lovely guy and we felt comfortable with him from the moment he came and did a very thorough assessment of the job. His work was very neat and clean. The job was done perfectly and we will definitely be using his services for other work on the flat.
AEE Construction Ltd
Rating: 5 out of 5
Extension Builder in Blackwall
General renovations, electric, plumbing, decoration, painting, kitchen fittings, tiling, flooring, bathrooms, extensions, loft conversions and property maintenance
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Latest review:
Handyman- 27 Jul 2023
Very professional and polite man. Job done neat and professionally. Would highly recommend.
Inside Out
Rating: 4.9 out of 5
Extension Builder in Blackwall
Inside Out was formed in 2009. We are an established, London based building company operating throughout London and within the M25. We deliver an honest and straight forward service, with quality workmanship at the forefront of everything we do.
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Latest review:
Extensions- 10 Oct 2022
A good team, good building technicians, completed the job according to plan and delivered on time.
DDR Group Ltd
New on MyBuilder
Extension Builder in Blackwall
DDR Group Ltd is a professional building and refurbishment company providing high quality construction services across London and Essex. We specialize in bathroom fitting, kitchen installations, full property refurbishments, extensions, loft conversions, roofing, decorating, carpentry, groundwork, drainage and general building works.
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great construction limited
Rating: 5 out of 5
Extension Builder in Blackwall
I am a builder who undertakes all types of jobs from kitchens, bathrooms, drive ways, garden work, roofing, extensions loft conversions, painting, flooring, plastering
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Latest review:
Extensions- 1 Aug 2024
Good work progress and ethos. All going very well.
3 plastering guys
Rating: 5 out of 5
Extension Builder in Blackwall
London home developers take care and pride in our professionalism. We ensure minimal fuss for our customers and provide them with an end project of their exact want. London home developers are able to complete clients jobs such as Loft and extension, brick work, steel work, partitions, plastering, plumbing, luxury bathroom and much mor.
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Latest review:
Plastering- 12 Jul 2026
Rami did a great job repointing our walls and fixing cracks in our kitchen. Very pleased, quick and processional. Highly recommend. We will definitely use him again.
W8 Build Ltd
Rating: 5 out of 5
Extension Builder in Blackwall
Hi, I’m Jon, the Founder of W8 Build. With over three decades of experience in both modern and listed buildings, I’ve dedicated my career to transforming spaces – from bespoke home extensions and loft conversions to the careful restoration of historic landmarks. I even had the honour of working on Windsor Castle alongside Her Majesty The Queen after the 1992 fire, a project that taught me how to balance grandeur with precision. At W8 Build, we believe exceptional craftsmanship should be accessible. Grounded in values of integrity, reliability, and meticulous attention to detail, my team and I bring the high standards of historic restoration to every project – all at market-competitive rates. Whether you’re seeking a stylish roof terrace, a complex basement conversion, or a heritage-sensitive renovation, you’ll receive a fixed-price, transparent proposal and a commitment to excellence that makes quality affordable. There are no hidden fees or inflated costs here – just clear communication, thoughtful planning, and the peace of mind that comes from working with a team that treats every project, whether a royal landmark or your family home, with equal care and professionalism. Let’s work together to bring your vision to life, blending timeless quality with modern practicality. Your dream space deserves nothing less. W8 Build by Jon Taylor
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Latest review:
Extensions- 14 May 2025
Jon was able to take a failed project from a previous contractor and manage historic building preservation, regulation in Westminster, a lack of parking, plumbing from the Victorian age, and a demanding client to deliver a beautiful result. I love my garden flat extension, it manages to respect the historic nature of a building from the 1840s while also adding amenities to be proud of in 2025. Thank you Jon (and team) and best of luck with future business.
Sebek Construction Ltd
Rating: 5 out of 5
Extension Builder in Blackwall
Sebek construction family run business for the last 20 years. High quality refurbishment specialits. Kitchens, bathrooms, loft conversion and extension. all work comes complete with public liability insurance.
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Latest review:
We have been working with Derek Borkiewicz (Sebek Construction) on a renovation of a garden flat in Little Venice since last autumn. We needed to completely restore the whole flat, including the garden. This was our second renovation project and by this time we knew what we wanted to do, which mistakes to avoid and what to pretend from a qualified builder. We will never stop saying how lucky we have been to find Derek and his team! Derek is not only a professional builder who is very careful to the smallest of the details. He is not only a very good project manager who is constantly checking the work of his men. Derek is a friend who takes on board a project like it is his own project. He suggested the most convenient and best solutions for any problem we came across during the works. There wasn’t a time when he didn’t know what to do to solve a difficult situation (and there are lots of small and big issues coming up in a renovation work) no matter how complicate they were and how long it took to solve them. His availability and his courtesy are incredible above all in a fast running city like London. This is priceless to us. His hard work can be seen in the wonderful result we reached with this garden flat. If we ever decide to work on another project we won’t think twice about working with Derek once again. In fact, now that we found the perfect man to work with, we are looking forward to finding another renovation project to work on! Monica
Beam Developers ltd
Rating: 5 out of 5
Extension Builder in Blackwall
Unlocking a world of possibilities, BEAM Developer Ltd specializes in an array of dynamic property services. From sleek architectural designs for planning applications to robust structural packages, we've got your project covered. Our expertise extends to seamless renovations, repairs, and captivating new extension and conversion builds. Elevate your vision with BEAM Developer Ltd – where excellence meets innovation!
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Latest review:
Ahmad and the Beam Developers team did an amazing job on my rear extension. We were very particular with our requests and are generally picky people but they were very patient and accommodating to our every request. We were shown the drawings, made adjustments and managed to tailor the project exactly to what we wanted. The finished results were amazing. No big project for us soon but should we plan to do the loft will definitely use Ahmad and his team again.
Chris is carpentry
Rating: 4.5 out of 5
Extension Builder in Blackwall
"Welcome to Chris's Carpentry and Joinery. As a skilled sole trader, I blend the artistry of carpentry with the precision of joinery to create bespoke solutions for your living spaces. With a passion for woodworking and years of expertise, I bring your ideas to life with personalized attention and a commitment to quality. Let's collaborate and transform your vision into beautifully crafted, functional pieces that elevate your home."
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Latest review:
Carpentry- 12 Mar 2025
Chris was great- he installed a internal bi-fold unit which needed some considerable adjustment due to the measurements of the space it needed to go in- he took his time to understand the problem and work out a solution- the doors now works great and often get complimented by those who visit. Chris then helped fit a number of doors with handles in the property upon request- doing a great job in the process. Chris is a very tidy worker and is very good at communicating and being punctual. He was always very polite and was very careful to make sure he took care of the space he was working in at the property. He is also extremely reasonably price- would recommend him to anyone else- and will for sure contact him if I have any other jobs doing. Chris is a star!
UQC – Construction & Refurbishment
Rating: 4.7 out of 5
Extension Builder in Blackwall
UQC is a London-based construction company specialising in high-quality residential projects, including: • House extensions (rear, side return and wraparound) • Loft conversions (dormer and hip-to-gable) • Full property refurbishments • Structural alterations (RSJs and load-bearing walls) • Kitchens and bathrooms We work closely with architects, structural engineers and Building Control to ensure all work is fully compliant and delivered to a high standard. UQC stands for Unique Quality Construction — reflecting our focus on precision, organisation and attention to detail on every project. We prioritise clear communication, well-managed sites and reliable delivery from start to completion. Based in Bexleyheath, we cover South East London and surrounding areas.
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Latest review:
Conversions - General- 4 Jun 2026
very good service
Marangoni Construction
Rating: 5 out of 5
Extension Builder in Blackwall
We are dedicated to building quality projects and our wealth of experience and efficient working methods mean that with us on board, you get more - more choice, more cost savings and a quicker turnaround.We are a hard workers,good organiser,sociable,loyality,honest
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Latest review:
Hard working and experienced professional with large experience in mid-sized residential projects. Dyone always tries to go the extra mile to please the client. He has worked in several European countries giving him access to better knowledge of materials and suppliers. Great to work with.

3.9

Top rated Extension Builders

Our Extension Builders in Blackwall, are rated 3.9 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 Blackwall?

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

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

What are the hourly rates of extension builders in Blackwall?

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

Find extension builders in Blackwall with MyBuilder

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

Step 2: Compare different extension builders in Blackwall

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

Step 3: Hire Blackwall extension builders with confidence

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

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

What to ask a Blackwall extension builder before hiring?

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

An extension builder in Blackwall 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 Blackwall 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 Blackwall?

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 Blackwall 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 Blackwall 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 Blackwall

Can an extension builder in Blackwall help with planning permission?

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

Many Blackwall 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 Blackwall help with materials and finishes?

Yes, most extension builders in Blackwall 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.