Extension Builders in Blackfriars

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

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

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 Blackfriars

3558 Results

Sort by:

Imeraj
No reviews yet
Extension Builder in Blackfriars
I am a construction worker . I had 5 years working for a civil engineering company like supervisor . I have lot of skills referring construction ( steel erection , timber works , underground works etc ) . Last year i finished level 1 and 2 in plumbing aswell to complete more professional skill and manage the common problems in most of new and existing properties . Contact me if you have something and let proceed to fix or upgrade your properties .
Get in touch
The Bellevue Interiors Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
Recently joined - skilled competent traders with over 20 yr on site experience Professional clean on time. Happy to help with any of your projects: NEW BUILD, RENOVATIONS, EXTENSIONS, LOFT CONVERSIONS, KITCHEN, BATHROOMS, OUTBUILDINGS, CEILINGs, WALLS, FLOORS, DOOR ASSEMBLY, FLOOR LAYING, ELECTRICAL & PLUMBING INSTALLATION, BUILD IN WARDROBES, PLASTERING, PAINTING AND DECORATING, SHOP FITTING - design supply and install. Don't hesitate to ask if any questions.
Get in touch
Latest review:
Conversions - General- 22 Jan 2022
Rumen and team did a fantastic job of converting our concrete slab garage into a very modern and posh office space well within our budget. If you see before and after pictures - the transformation is unbelievable. They were incredibly friendly and very patient listening, understanding and building on our requirements. I would highly recommend Rumen and his team from Bellevue Interiors.
Omran Multaji
No reviews yet
Extension Builder in Blackfriars
We do professional jobs
Get in touch
Sureform Construction Ltd
No reviews yet
Extension Builder in Blackfriars
Hi, My name is Tom Mc Hugh, I have been in the construction industry for over 30 years. I originally started in the field of Architecture but later moved into the construction side of things forming Sureform Construction Ltd (SCL) in 2009. We have great experience in ground works and Temporary works and we have completed several new basements and total renovations within London including some high end projects in, Kensington, Chelsea, Notting hill areas. We are experts with anything relating to concrete, underpinning, Superstructures, foundations, RC slabs etc. We also carry out general groundworks, drainage, remedials and full hard landscaping including tarmac, paving etc. We work on commercial & domestic projects. We generally work within the London area but we have carried out Projects further afield such as Oxford, Cambridge, Bishop Stortford, Stevenage. At Sureform Construction we pride ourselves on professionalism and commitment to Safety and quality Workmanship and attention to detail. We have several Customers and Main contractors that we have worked with on a continual basis over the years. We look forward to hearing from you and seeing how we can help with your project.
Get in touch
DM Builder
No reviews yet
Extension Builder in Blackfriars
I am a general builder and have 15 years experience in the trade. I have worked for large companies which have enabled me to gain a vast knowledge in many areas. I have completed large refurbishments to smaller projects. I work with qualified Electricians and plumbers so am confident that I can complete tasks.
Get in touch
PK Construction
No reviews yet
Extension Builder in Blackfriars
Family run loft conversion and extension specialist with over 25 years experience. PK Construction offers dedicated building services at competitive prices without compromising on quality. Word-of-mouth is where we get the majority of our work but we are always looking for new customers. Our expert team has the knowledge and to undertake both large and small projects
Get in touch
Mng Roofing Ltd
Rating: 5 out of 5
Extension Builder in Blackfriars
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.
Aariz build
No reviews yet
Extension Builder in Blackfriars
I have been working at the builder for more than 10 years and I have lost experience In renovating the house extensions, gardening painting, plastering tiling, waterproofing, electricity, plumbing and everything that covers the building work.
Get in touch
M.H Brickwork
Rating: 5 out of 5
Extension Builder in Blackfriars
Welcome to M.H Brickwork. We are a family run business of skilled and qualified bricklayers who have over 30 years experience in all aspects of the bricklaying trade. We pride ourselves on the quality of all our work. You will find our pricing very competitive.
Get in touch
Latest review:
Michael did a number of jobs for us including a front wall, small garden walls either side of the front path and restructuring the path to include front steps. Michael was reliable and able to give us ideas on what could be done. He is polite, his work is of a high standard and he approaches his work with real professionalism. We are very happy with his work and would recommend him.
A S Builders
Rating: 5 out of 5
Extension Builder in Blackfriars
We are a family run business in construction industry since 1990, initially started by my father and now his sons have joined the business and looking to revitalised the business through the use of up-to-date technology. We undertake all types of building work through our team of skilled labour from a small job up to New Build. Our most recent job was conversion of a detached property to 7 HMO's.
Get in touch
Latest review:
Extensions- 29 Apr 2026
Heera, Jagthar and team was my first personal experience with builders. Let me tell you, it was a pleasure to have them do our porch and other renovations in the house. They are so courteous, hard working and provided a great service. Firstly, I had a comprehensively written quote breaking down all of the steps required. Heera then ensured to keep me in the loop of any developments/any changes of plan required, outlining the reasons why and options, making it easy to understand and work together to completion. Their finish was to a high quality and they would always go the extra step to ensure this. I highly recommend AS Builders for any job and will definitely use them again in the future, and would recommend to my friends and family also. If you are considering them, grab a free quote and go from there... That's what I did! Thank you AS Builders for our renovations!
MSG DESIGN LTD
Rating: 5 out of 5
Extension Builder in Blackfriars
Hello I am Simion, the proud owner of Msg Design Ltd , A little about us With many happy and returning customers over the last 7 years, you can be sure of being well looked after. Our aim is to provide a stress free project, delivered in a manner that I am confident will exceed your expectations. I work with a small team of trusted colleagues, who communicate and work together well. Our customers are accustomed the outstanding quality of projects we complete, by sourcing quality materials with experienced installers we create truly bespoke masterpieces lasting our customers many years. 2 year guarantees are included as standard on all completed work. Availability We are always contactable via phone throughout the week, including evenings and weekends. If for any reason you are unable to contact us, please send a text message or email. Thank you for taking the time to consider our company’s profile, I look forward to hearing from you. Msg Design Ltd
Get in touch
Latest review:
Carpentry- 7 Jun 2026
Top carpenter. Will definitely be using again. Neat and great craftmanship.
D&M CONSTRUCTION BRO. LTD
No reviews yet
Extension Builder in Blackfriars
Over the 25 years D&M Construction Bro. Ltd has grown the business working for clients across London, who only demand the highest level of workmanship and service.Our best domain is quality and trust. Whether you are looking for profesional company to build extension, conversion, full refurbishment or bespoke new build home, we are here to help.
Get in touch
P & A DEVELOPMENT AND MANAGEMENT LTD
No reviews yet
Extension Builder in Blackfriars
P & A DevMan specialises in house extension, loft conversions, refurbishment, and property maintenance. Our specialist craftsmen complete your renovation to the highest finish, and our experienced site managers and project managers coordinate everything to ensure the projects run smoothly. We take on the big jobs that will increase the value of tired buildings but we give the same attention to smaller commissions, too.
Get in touch
Eastside Maintenance Ltd
No reviews yet
Extension Builder in Blackfriars
With over 40 years of combined experience, we have successfully delivered a variety of projects, including basement conversions, kitchen and bathroom remodels, loft conversions, and more. We value our working relationship with our clients and strive to build long-term relationships. We understand that overall cost is a concern, which is why we offer competitive prices for our services.
Get in touch
Carpenters
No reviews yet
Extension Builder in Blackfriars
Carpenter peinter small electrical
Get in touch
BSD Design & Build LTD
No reviews yet
Extension Builder in Blackfriars
🏗️ Build with Confidence – Build with Us! 🏡 B.S.D Design & Build is a proud member of FMB. Not every builder is a Master Builder! In an unlicensed industry, choosing a Federation of Master Builders member gives you peace of mind, knowing we meet strict entry criteria and undergo continuous monitoring. ✅ Expert Craftsmanship ✅ On-Time & On-Budget ✅ Built to Last Trust the professionals. Contact B.S.D Design & Build today! 📞🔨
Get in touch

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.