Extension Builders in Pentonville

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 Pentonville

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Erik Novak
Rating: 5 out of 5
Extension Builder in Pentonville
I’m mostly working on my own. Always discussing any work or changes with customers before going ahead with it.
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Latest review:
Handyman- 24 Apr 2026
Helped us move a large shed. Turned up on time, made himself available, and handled a tricky move with care. Easy to work with and good communication throughout.
Balham construction Ltd
Rating: 5 out of 5
Extension Builder in Pentonville
Balham construction are a London based refurbishment and construction company that offer a wide range of services from full Property refurbishment to extensions and loft conversions and everything in between
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Latest review:
Tom and the team completed a full renovation of my flat. This included refurbishment of my kitchen, bathroom and general redecoration. The team were extremely hardworking and punctual and no job was too difficult for them. I would highly recommend their services.
INNOVATE BUILD GROUP LTD
Rating: 4.8 out of 5
Extension Builder in Pentonville
I have over 20 years of experience in the construction industry. I am highly customer-focused and quality-driven, always aiming to complete jobs to the highest standards. My key goal is to ensure every project meets /exceeds customer expectations, delivering outstanding results every time.
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Latest review:
Extensions- 7 Jun 2026
Zilvinas and the team at Innovate Builders were outstanding from start to finish. We hired them to build our two-storey side extension. Zilvinas was open, professional, and fully committed throughout the project. He was always available to answer questions, offer advice, and guide us through each stage of the build. His team worked hard and delivered a high-quality finish, all while keeping the project on schedule and within budget. As this was our first major building project, we relied heavily on Zilvinas's expertise and guidance. His knowledge, practical advice, and problem-solving skills were invaluable and made what could have been a stressful experience feel smooth and manageable. We are absolutely delighted with the result and would not hesitate to recommend Innovate Builder. As I said it was our first ever big project, we had heard many horror stories but are so grateful to have found Zilvinas and his team.
The00company
Rating: 5 out of 5
Extension Builder in Pentonville
Independent family business taking pride on our reputation for a unique combination of workmanship and service regardless of the size of project. My team and I are customer-oriented providing you with quality products built to your exact specifications in the specified time period. We provide a personalised service that involves you in all design and planning.
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Latest review:
Khin and Senh did an amazing job redoing all the skirting in our home. Their quote was competitive and their workmanship outstanding. They helped us source the materials to our specification for a great price, handling all the delivery details and were happy to pick up any bits and bobs to get the job done. Each day they arrived on time and often worked late to accommodate the fact we had carpets coming in the following week. After each day tools and materials were squared away and they would send updates on progress. The final product was top quality and has nicely finished off our home as part of a large book of renovations. Finally any snags that I did notice they were happy to come back and address, I couldn’t have wished for any more from these guys. All the best !
George
Rating: 5 out of 5
Extension Builder in Pentonville
Hi i am George, general builder with over 10 years of experience in domestic and commercial building work. I pride myself on exceptional craftsmanship, clear communication, and keeping a tidy work site. From basic handyman jobs to full home renovations, my goal is always to deliver a high-quality finish that exceeds your expectations.
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Latest review:
Painting & Decorating- 16 Mar 2026
Really happy with the work George did. He turned up on time, cracked on with the job, and finished everything within the timeframe he gave. The standard of work was excellent, with attention to detail. Would happily use him again.
Ceca Developments LTD
Rating: 5 out of 5
Extension Builder in Pentonville
Hael Construction Ltd, a proud member of the Federation of master builders, is a trusted construction company based in North London, delivering high-quality building services across the region. We specialise in new builds, extensions, loft conversions, renovations, groundworks, electrical installations, and plumbing. With a skilled team of qualified tradespeople and experienced project managers, we provide a complete service from design to completion. Our focus is on quality workmanship, transparent communication, and delivering projects on time and within budget.
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Latest review:
Extensions- 23 May 2022
Ceca Developments have done an outstanding work on our side and rear extension project, and we would definitely recommend this company. Firstly, they have offered a really competitive quote for the work and have been very transparent and detailed in regards to how long it will take to complete the project. Sebastjan has been a pleasure to deal with and was very helpful during the project, providing honest and useful recommendations and being available every time we needed anything. All the work has been completed to a very high standard and to the agreed timelines. We did not have to worry about anything during the whole project, which made this a very pleasant experience.
Mario Services
Rating: 5 out of 5
Extension Builder in Pentonville
Mario & Alex Construction LTD specialise in construction and building services, complete property refurbishment, house extensions and loft conversions. Provides unmatched customer service. Our commitment to small,hudge integrity, providing the highest value and satisfied customers, has been the ingredient that has fueled our growth from the beginning. We ensure that all our work is professionally managed so that the result is of outstanding quality, cost-effective.
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Latest review:
Bathroom Fitting- 20 Jan 2023
We highly recommend Mario & his team. They fitted a new kitchen & bathroom to a really high standard within a short, timeframe. They work hard, are friendly, professional & honest, my neighbour even commented on how considerate they were! Upon first meeting Mario we were impressed by how organised he was. He arrived on time with the description we’d posted on my builder & went through it methodically. We had A LOT of questions! He answered all of them & didn’t rush us. We received a competitive quote within a day as promised. It included everything we discussed & he quickly answered our follow up questions. We wanted an accurate idea of the cost of electrical work & Mario arranged for his electrician to come & inspect/quote before we’d appointed Mario the job. Our kitchen & bathroom is complicated, with lots of difficult angles. Damp, unlevel floor, unlevel windows, a low ceiling were uncovered in the bathroom. Mario did well to identify solutions, giving us expert advice. Pipes were neatly chased into the wall. Underfloor heating & LVT, tiling, grouting & painting all done to a very professional finish. He kept us informed of progress, checked our preferences & was patient when we had supply delays, finding ways to ensure the job finished on time enabling us to move from our temporary accommodation back home in time for Christmas. He promptly fixed some minor issues after the job finished. We highly recommend Mario & would use him again.
DC Brickwork
Rating: 5 out of 5
Extension Builder in Pentonville
Dear Customers I am honest trustworthy reliable and hardworking and I have over 25 years experience in the industry.
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Latest review:
Bricklaying- 29 Jun 2017
I would recommend Damian. Did a good job, good communication and was on site when he said he would be. Polite and friendly. I would be happy to use again.
Marco ltd
Rating: 4.6 out of 5
Extension Builder in Pentonville
we put effort and commitment into our work so that the client is satisfied with our work
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Latest review:
Hard Flooring- 1 Sep 2026
I WANTED TO LEAVE A MINUS REVIEW BUT THERE IS NONE, THAT IS WHY I HAVE LEFT THE LEAST POSSIBLE SCORE. I PERSONALLY DO NOT THINK THIS GUY CALLED MARCO KNOWS ANYTHING ABOUT BUILDING AT ALL. HE IS A ROGUE BUILDER. HE SAID HE HAS 25 YEARS BUILDING EXPERIENCE, WHICH IS A LIE. I CALLED HIM TO DO MY FLOORING, KITCHEN CABINET, TOILET. PAINTING, FIXING LEAKS. HE RUINED THE WHOLE HOUSE. 8 MONTHS ON, WE ARE STILL REDOING ALL THE WORKS HE DID, HE JUST SPLASHED SILICONE ON THE UPVC TO FIX A LEAK. THE LEAK CAME THROUGH THE CEILING UNTO THE FLOOR CAUSING A BIG FLOOD IN THE HOUSE. HE IS THE MOST UNTIDY BUILDER. HE SAID HE WAS PAINTING, HE SPLASHED PAINT ALL OVER THE HOUSE, HE KEPT SAYING HE WILL TIDY IT UP AT THE END. UP TILL NOW, 8 MONTHS AFTER, I AM CLEARING THE MESS. ALL THE GROUT HE PUT ON THE TILES CAME OFF THE FIRST TIME I MOPPED THE KITCHEN FLOOR. ALL THE TILES HAVE MARKED PAIINT ON THEM AND IT IS EXTREMELY DIFFICULT TO REMOVE THEM BECAUSE THERE IS A LOT OF THEM.
Arisa renovation LTD
Rating: 5 out of 5
Extension Builder in Pentonville
Arisa Renovation LTD is a reliable and experienced building company based in London, offering a full range of high-quality renovation and construction services. We specialise in complete property refurbishments, including house renovations, extensions, and loft conversions. Our services cover all aspects of building work such as painting & decorating, bathroom and kitchen installations, carpentry, flooring, tiling, plastering, and general maintenance. We have extensive experience in structural work, including roofing, framing, and full property transformations from start to finish. Whether it’s modernising an interior space, installing a new bathroom, building bespoke stairs, or completing a full renovation project, we deliver excellent craftsmanship with great attention to detail. We pride ourselves on being professional, punctual, and tidy on every job. All work is completed to a high standard, on time, and within budget. Customer satisfaction is our top priority, and we maintain clear communication throughout every stage of the project. We also offer a workmanship guarantee to give our clients peace of mind. If you are looking for a trustworthy and skilled builder in London, Arisa Renovation LTD is here to help bring your project to lif
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Latest review:
We are extremely happy with the bathroom renovation completed by Arista Renovation LTD. The workmanship is top quality, especially the tiling and finishing details. Communication was clear throughout and the project was delivered exactly as agreed. Would definitely use them again.
Aldo
Rating: 5 out of 5
Extension Builder in Pentonville
Hi I’m Aldo , I work as a plumber. I’ve got 4 years experience on plumbing working for a big company. Now I’m on freelance private trader. I am able to undertake any job on plumbing, first and second fix. For any emergencies I’m available 24/7.
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Latest review:
Plumbing- 2 May 2019
Aldo was prompt, helpful, and completed job competently. Price was very reasonable. Pleasant chap to deal with.
UK Crown Developments Ltd
Rating: 3.7 out of 5
Extension Builder in Pentonville
UK Crown has experience of design and build in all types of construction work in central, north and north west London for the last 20 years with exceptional quality finishing, friendly management and supervisors, design team, staff and sub contractors. The client will get benefit of FREE advise for architectural and structural ,mechanical and electrical, including party wall matter from our company and associates.( Subject to contract ) Terms and conditions
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Latest review:
Conversions - General- 28 Jun 2026
Ran off with money.
JBS Jonay Building Services Ltd
Rating: 5 out of 5
Extension Builder in Pentonville
Jonay Building Services LTD has been a consistent and trustworthy Construction Company in North London since 2004.We operate all over London and surrounding areas. J.B.S undertakes a great range of works for a huge variety of clients; From residential extensions, loft conversions and renovations, to commercial landscaping and shop fitting. Whatever your project we have a solution for you.
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Latest review:
Restoration & Refurbishment- 13 Jun 2023
This company was very professional. The work was completed on time and to a high standard. The work was also, good value for money. I would recommend JBS services to anyone seeking either home or business general refurbishment and building works.
London Improvers
Rating: 5 out of 5
Extension Builder in Pentonville
I'm a builder (carpenter) with 15 years of experience in England loft conversions and extensions - all building works. Carpentry and joinery is my main profession. I have a bricklayer, electrician, plumber and others on my team who are happy to help. All works done by us coming with warranty and insurance. Dear potential customers don't waste my time if you have budget below £1000 I don't have time for small jobs.
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Latest review:
Removal of existing kitchen and fit of new kitchen including belfast sink, washing machine, cooker and hood with external extraction, new floor. Vini and the others worked very hard, were very flexible with timings when problems occurred with delivery of items and after completion were available to check or answer any questions we had.
Full Circle Renovation Ltd.
Rating: 4.9 out of 5
Extension Builder in Pentonville
Full Circle Renovation specialises in complete home renovations across London, personally led by our founder from the initial consultation through to completion. Rather than simply providing building work, we take responsibility for coordinating every stage of the renovation, bringing together a trusted team of specialist trades and providing homeowners with a single point of contact throughout the project. Our approach combines careful planning, clear communication and practical project leadership to ensure every renovation progresses smoothly and every decision contributes to a successful outcome. We undertake complete house and apartment refurbishments, extensions, structural alterations, kitchens, bathrooms and bespoke interior improvements, working closely with each client to understand their priorities and create a realistic programme and budget from the outset. Whether you're planning a straightforward refurbishment or a more complex renovation, we believe every project deserves the same level of organisation, attention to detail and personal involvement. We would be delighted to discuss your plans and prepare a detailed quotation for the labour and general building materials required, together with practical advice on the best way to approach your project.
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Latest review:
The refurbishment of my small one-bedroom flat took approximately 2.5 months. I compared several builders before starting the project. The price was not the cheapest and the proposed timeline was not the shortest. Though Radilina seemed to be a good project manager and liked that she works on a fixed price for each work.
Inspire Construction Solution LTD
Rating: 5 out of 5
Extension Builder in Pentonville
We specialise in Loft conversion, House extension and all kinds of buildings works
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Latest review:
We did a lot of research ahead of our loft build, and spoke to customers of the companies we looked at. We were impressed with Toma and her team from the outset, especially in terms of clarity and communication. We sat down with the project team at the start and walked through the week-by-week plan for our build, then a whatsapp group and weekly meets meant we knew exactly what was happening throughout. Our endless questions were responded to swiftly. Additional optional trade-ups (eg top-hung windows, larger bathroom window etc) were discussed and explained with context, sound advice (and clear pricing where nec) but always still optional. Toma's communication with the teams also seemed strong and continuous, with materials always arriving in time and ahead of when needed, no down-days etc - and importantly, the teams all seemed happy and were just lovely people to have around. I realise with hindsight too that the team's care and workmanship really put them a cut above many others in my area and the project remained on schedule. I wouldn't hesitate to recommend ICS for the whole package and in fact we've also chosen to use them again for a kitchen extension.

4.1

Top rated Extension Builders

Our Extension Builders in Pentonville, are rated 4.1 out of 5 based on 18 reviews from customers like you.

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What types of services are offered by local extension builders in Pentonville?

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

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

What are the hourly rates of extension builders in Pentonville?

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

Find extension builders in Pentonville with MyBuilder

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

Step 2: Compare different extension builders in Pentonville

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

Step 3: Hire Pentonville extension builders with confidence

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

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

What to ask a Pentonville extension builder before hiring?

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

An extension builder in Pentonville 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 Pentonville 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 Pentonville?

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 Pentonville 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 Pentonville 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 Pentonville

Can an extension builder in Pentonville help with planning permission?

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

Many Pentonville 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 Pentonville help with materials and finishes?

Yes, most extension builders in Pentonville 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.