Extension Builders in Blackfriars

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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Some of our top rated extension builders in Blackfriars

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Edward Fox Building
Rating: 5 out of 5
Extension Builder in Blackfriars
We are a family company in which we have been in the industry for over 20 years. We specialise in all aspects of construction such as renovations, loft conversions, new builds, and extensions. We like to give our clients affordable and competitor rates and work closely with the to insure the works and their ideas are turned into reality and make it as stress free them as possible.
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Latest review:
Restoration & Refurbishment- 31 Jul 2023
We put the ad up on Saturday morning, Ed popped over in the afternoon and gave us a quote and the job was completed on Monday! Super quick process. For a job that was causing us stress and we quickly realised we couldn’t do ourselves, Ed came in and sorted it really quickly as well as giving us advice on next steps for our redecorating. Will be contacting again when we need further help!
Velvet Construction
Rating: 5 out of 5
Extension Builder in Blackfriars
About Velvet Construction: 5+ year experience in the building trade. CSCS Black Card Holder All health and safety certificates. Velvet Construction has a large team of qualified tradesmen, delivering a high standard of workmanship at a competitive price. For more information on our services please contact us. We offer free quotations and all work is insured and guaranteed.
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Latest review:
Restoration & Refurbishment- 10 May 2019
Velvet Construction are a friendly and professional contractor who work hard to deliver an excellent service. We have worked closely with them and their practical and dynamic approach is refreshing to work with in a professional capacity and we would highly recommend them. Their quality of workmanship is excellent which is largely driven by their own high standards which they monitor closely and consistently. They are organised and communication is always great. A big thank you to the whole team and Specially Negedet being a joy to work with . Highly recommend him and his hard work time. Thank you
A.R.Renovators
Rating: 5 out of 5
Extension Builder in Blackfriars
We are a family-run team made up of an experienced Architectural Technician and a skilled site manager and builder with over 20 years of experience delivering high-quality renovation services across London. Combining technical expertise with hands-on construction knowledge, we’re committed to providing reliable, professional service with attention to detail at every stage. We take pride in meeting deadlines, staying within budget, and exceeding client expectations through clear communication and quality workmanship.
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Latest review:
Conversions - General- 20 Jun 2026
My partner and I hired Alonso and Alex to undertake a full renovation of our 3-bedroom house in SE8. Having received quotes from several other contractors, the moment we met them, it was clear they were clear communicators, approachable and dedicated to their clients. We’re incredibly happy with the work they did. The scope of work was highly varied, including rectifying historical damp issues in the lower ground room, external repairs to the roof drains and chimney, installing two new bathrooms, plus all the other internal and external work you’d expect from a full renovation. All of which was completed to a very high standard! They were always open to discussing and rectifying anything we weren’t completely happy with, or problem-solving whenever unexpected issues arose (which always happens when renovating a property of this size!). The team are lovely, trustworthy people who are a genuine pleasure to have in your home. I can’t recommend them highly enough.
(TLC) THE LONDON CONSTRUCTION GROUP LTD
Rating: 5 out of 5
Extension Builder in Blackfriars
cover a broad spectrum within construction ranging from both residential and commercial contracts, bespoke builds, refurbishment, and maintenance also implementation of design from minimalist design to period restoration and renovation of properties.
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Latest review:
Restoration & Refurbishment- 16 May 2021
TLC have completed the first phase of the project which has involved a complete renovation and upgrade of the kitchen, bathroom, and rear garden area. A new contemporary staircase has also been fitted. The work has been completed well ahead of schedule, and this is testament to the planning and coordination skills provided by TLC. All of the work has been completed to a very high standard, and a great deal of care has been taken to ensure the minimum disruption to the local residents. We are extremely grateful for the advice and support provided to us leading up to the restoration work and whilst the restoration was underway, and we are absolutely delighted with the final results. Our house has been transformed into a contemporary family home. Many thanks to Bradley, Paul, and the rest of the team at TLC.
creative solutions 4 you limited
Rating: 5 out of 5
Extension Builder in Blackfriars
a small building and restoration company, a builder with over 20 years of experience, we take proud of our projects building a good relationship with our clients.
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Latest review:
Bathroom Fitting- 10 Nov 2020
William and his team were very good and installed an entirely new shower cubicle in place on an existing cupboard in a bathroom with previously only a WC and sink. I am delighted with the result and will be using William and his team again for other projects across my rental portfolio.
Bass Construction Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
A multidisciplinary construction firm with a focus on custom construction, Bass Construction/Design was established in 2013. Our team provides services for residential and commercial properties from the planning to construction stages with the goal of creating spaces where functionality and aesthetics coexist.
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Latest review:
Extensive work including a double height extension, reconfigured layout on two floors, large area of glazing, roof lights, kitchen and bathroom fitting, laying of a patio and other ancillary work. The work was carried out by Bruno, Roberto and the team to the highest standards with great attention to detail and with care. The completed project was beyond our expectations.
Marangoni Construction
Rating: 5 out of 5
Extension Builder in Blackfriars
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.
W8 Build Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
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.
3 plastering guys
Rating: 5 out of 5
Extension Builder in Blackfriars
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- 5 Jun 2026
Very skilled, professional and a great person. Thank you Rami
Sebek Construction Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
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
Pops Building Services Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
I am a city and guilds advanced craft qualified carpenter/joiner With over 30 years experience in the construction industry. I was the director of a property development company. I’ve managed contracts for NHS trusts as well as private contractors. The types of work I normally undertake are loft conversions, extensions, renovations, kitchen and bathroom installations
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Latest review:
Peter was the on-site foreman on our complete house renovation, which took just over a year. This included an additional ensuite pod bedroom in the roof and a side-return and extension to the kitchen. Peter was totally reliable throughout the project and thoroughly professional. Throughout this time we were living in the house with the children. He was always on time, managed the on-site team well and communicated clearly with us. His workmanship is high quality and he was also a stickler for checking the work of others and getting it updated if it wasn’t up to scratch. I have no hesitation in recommending Peter.
Inside Out
Rating: 4.9 out of 5
Extension Builder in Blackfriars
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.
LLC projects limited
Rating: 5 out of 5
Extension Builder in Blackfriars
At LLC PROJECTS LTD, we deliver high-quality building and renovation services across London, Surrey, and Hampshire. With over 16 years of experience in the construction industry, our team specialises in all aspects of building works, maintenance, and plumbing — from full refurbishments and extensions to kitchen and bathroom installations. We pride ourselves on excellent workmanship, attention to detail, and reliable project management from start to finish. Most of our work is carried out in-house to ensure consistent quality and high standards. Whether it’s a small repair or a large-scale project, we approach every job with professionalism, transparency, and care. Contact us today to discuss your next project and see how we can bring your vision to life
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Latest review:
I recently hired LLC Projects Limited to refurbish my ground floor and add a new bathroom, and I couldn’t be happier with the results. From start to finish, the team was professional, reliable, and truly cared about delivering quality work. The new bathroom looks amazing, and the ground floor transformation exceeded my expectations. Communication was great throughout, and they kept everything on track and tidy. The crew was friendly, and they handled any concerns I had quickly. I’d definitely recommend LLC Projects Limited for any home improvement work—they’ve earned my trust, and I’ll be calling them again for future projects
Ed’s loft conversions Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
We specialise in loft conversions, Extension to a complete house refurbishment.
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Latest review:
I engaged Edi to work on a full renovation and refurbishment of a 4 bedroom detached house with front and back gardens on Blackheath’s Cator Estate. Edi did an extensive amount of work, including stripping out; plumbing; plastering; windows installation; carpentry; and decoration. In addition, after commencing the property work, once the scaffold had been erected, following sensible advice, Edi and his team replaced the roof and fully insulated the attic; fitted additional electric points; rebuilt the garden patio; and replaced the flooring throughout, in addition to other important jobs including re rendering and pointing of chimneys, building new wardrobes in the main bedrooms; and upgrading the radiators. A new kitchen, and two new bathrooms have been fitted. The kitchen redesign meant knocking through a wall with the lounge to create a larger space. Edi is a highly skilled craftsman, who thinks creatively as he works to make best use of the space, including shelf fittings, and additional lighting for example. He has built some beautiful wardrobes, and the internal decorations have brightened up what was previously a rather shabby looking house. In addition to the above, I wish to commend Edi for his professionalism, courtesy, and passion for doing the best work possible. On all the site visits I attended, and every time I spoke with him on the phone, it was striking how much he cared about the work that he was doing, his desire to ensure that the house would look the best. I always left site visits with the feeling that he cared so much about the house that he could be safely relied on to give the best advice to enable us to make the right decisions. I also noticed that Edi and his team would take the upmost care to keep the property safe, tidy and in good shape throughout the project. He can be fully trusted to look after any site he works on. He is intelligent and careful when it comes to safety and security. It has been a pleasure for Edi and his team to work with us over a period of around 6 months, and he did so much to reduce the stress of a significant project so that we could always rely on him to work methodically, patiently and sensibly, and to make best use of the resources available. His pleasantness shines through, and everyone I know who has spoken to him has always provided me with the most positive feedback I have no hesitation in recommending Edi to anyone who wishes to engage him for future projects, and is most deserving of the good words that I and others that work with him have to say about him.
Sam's Building Maintenance and Constructions Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
Sam's Building Maintenance and Construction Ltd has more than 25 years experience in First and Second Fix carpentry, Kitchen installation, extension, loft conversion and general refurbishment work. We deliver quality services to meet customers' specifications and within stipulated deadlines .
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Latest review:
Sam did 5 and half meter kitchen, with large shower and laundry rooms extension for me. He is of very good character, worked professionally, reliable and his work was good.
JED BUILDERS LTD
Rating: 5 out of 5
Extension Builder in Blackfriars
A limited company established in 2016. More that 8 years experience in construction business. We undertake all building works, big or small, managing and looking after project so the client can have the best results possible.
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Latest review:
Kitchen Fitting- 14 Dec 2018
Very lovely and professional and clean. Very prompt/punctual and worked efficiently , will be using them again to do more work in my property. Definitely with recommend them to anyone ! 10/10 from me ! Good service delivery

4.1

Top rated Extension Builders

Our Extension Builders in Blackfriars, are rated 4.1 out of 5 based on 18 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 Blackfriars?

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

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

What are the hourly rates of extension builders in Blackfriars?

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

Find extension builders in Blackfriars with MyBuilder

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

Step 2: Compare different extension builders in Blackfriars

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

Step 3: Hire Blackfriars extension builders with confidence

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

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

What to ask a Blackfriars extension builder before hiring?

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

An extension builder in Blackfriars 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 Blackfriars 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 Blackfriars?

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 Blackfriars 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 Blackfriars 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 Blackfriars

Can an extension builder in Blackfriars help with planning permission?

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

Many Blackfriars 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 Blackfriars help with materials and finishes?

Yes, most extension builders in Blackfriars 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.