Extension Builders in Kings Cross

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (18 reviews)

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Some of our top rated extension builders in Kings Cross

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Propertyxhub Limited
Rating: 5 out of 5
Extension Builder in Kings Cross
An experienced building trade specialist team with all qualified professionals. From new build to small work, we are happy to help you honestly.
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Latest review:
Plumbing- 2 Jun 2026
Thank you for doing that for me just give me a shout. I will do thank you very much. Thank you very much. I had in my car. Thank you for fixing my shower now I can have a shower without giving the whole bathroom a shower when I want a shower and for showing me that you have fixed my shower I very much appreciate you taking the time to come and fix my shower I am eternally grateful
Castle view construction Surrey Ltd
No reviews yet
Extension Builder in Kings Cross
Castle view construction Surrey Ltd is a building and refurbishment company delivering high quality construction services across residential and commercial projects. We specialise in full property renovations extensions structural works fit outs and maintenance
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B&K
Rating: 5 out of 5
Extension Builder in Kings Cross
B.K. Building & Renovation is a family-run building and renovation business based in South Harrow. We provide reliable, high-quality work across extensions, brickwork, blockwork, plastering, painting and decorating, tiling, flooring and general property improvements. We take pride in clean workmanship, clear communication and attention to detail from start to finish. Whether it is an internal renovation, plastering and finishing work, brickwork, flooring or a larger building project, we aim to complete every job safely, neatly and to a professional standard. Customers choose us for our reliable service, respectful approach, tidy working habits and commitment to quality. We treat every property with care and work hard to deliver results our customers are happy to recommend.
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Latest review:
Benjamin and his team did a fantastic job on my property building a 6m by 6m Extension walls in only 2 days, it was done ahead of time and on budget. He was very conscientious and nothing was to much trouble. Done all the pictures of each step along the way needed for Building Control Guy. The quality and workmanship was first class and I would definitely recommend him for all types of building/refurbishment work.”
Daniel
No reviews yet
Extension Builder in Kings Cross
👋 We are a small Italian family-run business based in North West London, specialising in tiling, kitchens and bathroom refurbishments. 🧱 With over 25 years of hands-on experience, we take pride in delivering precise, clean and long-lasting results. ✅ All our work is guaranteed and carried out with attention to detail and respect for your home. 📍 We cover West Hampstead, Kilburn, Camden, and surrounding areas. 📩 Feel free to request a quote – we respond quickly and are happy to visit for a free assessment.
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B & I CONSTRUCTION LTD
No reviews yet
Extension Builder in Kings Cross
WE ARE A NEW COMPANY IN THE MARKET SINCE OCT 2017 AND HAVE BEEN SUCCESSFULLY FINISHING EXTENSIONS AND REFURBISHMENT AROUND LONDON. WE UNDERTAKE THE TYPES OF WORK LISTED BELOW AND GUARANTEE THE HIGHEST STANDARD AS WELL AS TIME EFFICIENCY WHEN TAKING UP A PROJECT. OUR TEAM IS MADE UP OF SPECIALISTS AS WELL AS LABOR WHO HAVE BEEN WORKING IN THIS INDUSTRY FOR MORE THAN 5/10 YEARS. SINCE OCTOBER 2017 WE ARE ABLE TO DEMONSTRATE OUR EXCELLENT WORK VIA PICTURES AND TESTIMONIALS FROM OUR HAPPY CLIENTS.
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S.H builders
Rating: 5 out of 5
Extension Builder in Kings Cross
Over 10 years of experience in delivering bricklaying, roof works, guttering, driveways, patios, carpentry, extensions for costumers. We try to work around your budget and deliver the highest quality work. No job is too small.
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Latest review:
Tiling- 11 Mar 2022
I was extremely satisfies with the works completed, Shoaib and the team understood what I wanted and did the works on time as promised. Highly recommended
Pavlito Construction Ltd
Rating: 5 out of 5
Extension Builder in Kings Cross
Pavlito Construction Ltd is a family run business with over 15 years of international experience in construction and general building (Germany, Italy, Poland and UK). We have worked extremely hard in order to establish a well respected name and reputation.
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Latest review:
Restoration & Refurbishment- 15 Feb 2016
Pawel and his team modernised our two bedroom house from top to bottom. They installed central heating in every room, they removed our old warm air heating, made an open plan for the kitchen and living room area, installed new bathroom and kitchen units and did the tiling too, they updated our electrics and sockets and also plastered and painted the walls and fitted our wooden flooring for downstairs. The job was completed within 12 weeks. We were very happy with the modernisation, our home looks completely different and has a new modern fresh feel. We will definately be using Pawel and his team for future jobs. Thanks again Khalima
Pro Construction London Ltd
No reviews yet
Extension Builder in Kings Cross
Pro Construction London is a trusted London-based building company with over two decades of experience delivering high-quality renovations, refurbishments, and property maintenance. We pride ourselves on our professionalism, reliability, and attention to detail, ensuring every project is completed to the highest standard. From full property renovations and loft conversions to bespoke finishes and one-off repairs, we provide a seamless service from start to finish — clear communication, transparent pricing, and a tidy worksite every time. Our reputation is built on satisfied clients who return to us for future projects, knowing they can rely on a skilled and dedicated team to bring their ideas to life.
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Brent Property Services LTD
Rating: 5 out of 5
Extension Builder in Kings Cross
We are a building and refurbishment company. We are not the type of team that we can do everything, in our team the plumber is plumber , electrician is not bricklayer as well, everyone is doing what they trained for. Works are insured, reference available. At request we provide gas safety certificate and electrical certificate.
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Latest review:
Restoration & Refurbishment- 18 Sep 2019
Work completed to a good standard. Thank you
RIVIERA PLUMB LONDON
Rating: 3 out of 5
Extension Builder in Kings Cross
Riviera plumb offer bathroom refurbishment and reactive plumbing maintenance over south east London, well established since 2018 in England, and since 2008 in Cannes ( France ) we offer a reliable service and we pride the quality of our workmanship as much as our customer service
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Latest review:
Bathroom Fitting- 21 Jun 2022
We are not entirely satisfied with Ludovic's work. Some of the tiles were not cut to the correct messurement which left big gaps in between. Worse still, the grouting was very messy and did not have a smooth finish. We will now have to get another Tiler to redo some of the tiling work. Overall, it was not a professional job and we are not very happy with his workmanship.
Mels Construction Solutions
Rating: 5 out of 5
Extension Builder in Kings Cross
Welcome to Mel’s Construction Solutions, specialising in loft conversions and house extensions. With 15 years of experience, we have gained extensive knowledge and expertise in providing top-quality services to our clients. We offer full building services for Loft Conversions Extensions Refurbishments Bathroom and Kitchen instillations All our work is guaranteed and done to the highest standards with competitive prices given.
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Latest review:
I would highly recommend Meli and use his service again. He is reliable, friendly and extremely personable. Meli saved time and cost by explaining what could be done better. Very talented all rounded experience. He’s a great contractor and I am very satisfied with his work. Thank you Meli!
FDT Construction Services Limited
No reviews yet
Extension Builder in Kings Cross
Construction company specialising in home extensions, loft conversions, patios, driveways and other construction services. You name it, we are here to help!
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KA Contractors Ltd
No reviews yet
Extension Builder in Kings Cross
*Kacontractorsltd: Excellence in Building and Renovation Services* *Qualified Electricians, Gas Engineers and plumbers. **Professional Builders and Renovators:** We have established ourselves as leaders in the building and renovation sector. Our expertise encompasses a wide range of services, including high-quality renovations, bespoke bathroom and kitchen installations, sophisticated extensions, loft conversions, and robust roofing solutions.
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We are Renovation Limited
No reviews yet
Extension Builder in Kings Cross
We are Renovation. …The key is in our name! We are a team dedicated to high quality renovations, our experience is second to none and we ensure that we satisfy and surpass our clients’ expectations. Allow us to take the immense pressure off your shoulders and bring to life your designs and visions of your dream home. We particularly specialise in full house renovations, loft conversions and extensions. Get in touch today to start your renovation journey with us!
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Safeway Build Ltd
Rating: 5 out of 5
Extension Builder in Kings Cross
At Safeway Build Ltd, we pride ourselves on delivering exceptional craftsmanship and reliable service in every project we undertake. Led by Florin, a highly trained professional with over 20 years of experience in the construction industry and a proud member of the Federation of Master Builders (FMB) since 2014, our company is built on trust, quality, and attention to detail. Working alongside trusted electricians and plumbers, we offer a complete service that ensures every aspect of your project is handled with care and expertise. Much of our success has come from referrals and repeat clients, a testament to the satisfaction and confidence our customers have in our work. At Safeway Build Ltd, we don’t just build — we build lasting relationships, turning your vision into reality with professionalism, transparency, and dedication. Whether you are looking for loft conversions, extensions or a refurb, all our services are carried out carefully, efficiently and to an exceptionally high standard of quality. We are happy to undertake any domestic work. At Safeway Build Ltd, no job is too big or too small.
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Latest review:
Kitchen Fitting- 10 Feb 2026
Florin and team were a joy to work with. Very communicative and worked to a great timeframe. Lots of little extra jobs were completed at no extra charge. Cost for job was reasonable and the tiling was immaculate - would definitely use Florin again. Would highly recommend!
FBF Construction Ltd
Rating: 5 out of 5
Extension Builder in Kings Cross
We take all types of jobs from demolish a house and rebuild at the highest standards.
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Latest review:
Florin extended and completely refurbished our 4-bedroom semi-detached house. This included extensive steelwork, underfloor heating, complete re-plumbing and rewiring, excavation, and an entirely new slate roof as well as varying extensions up to three floors high. I cannot say enough good things about his workmanship, professionalism and reliability. His workmanship makes a perfectionist like myself happy. He is also completely professional: even with our difficult neighbours he was always courteous and understanding, and even helped them sort out issues at a moment’s notice that had nothing to do with his building work on our property. And he is also thoroughly reliable. I cannot think of any instance where he committed to something and did not deliver — he even managed to finish all the work on our house ahead of schedule and on budget. We have been so happy with his work that we contracted him to build us a summer house as well, from scratch, and to complete revamping our front garden including elements of hard landscaping. Again he delivered flawlessly and we are very happy with the result. We also continually receive positive comments from people passing by and just seeing the front garden. We have used several other builders in the past on other properties, including far more expensive ones, and none compare to his level of competence, attention to detail in his workmanship, his complete professionalism and thorough reliability. Now that we have found Florin, we will never look for another builder again. I just hope once others experience what he delivers for themselves he will still have some availability for us in the future!

4.3

Top rated Extension Builders

Our Extension Builders in Kings Cross, are rated 4.3 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 Kings Cross?

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 Kings Cross 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 Kings Cross who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Kings Cross?

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

Find extension builders in Kings Cross with MyBuilder

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

Step 2: Compare different extension builders in Kings Cross

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

Step 3: Hire Kings Cross extension builders with confidence

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

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

What to ask a Kings Cross extension builder before hiring?

Before hiring an extension builder in Kings Cross or extension building company in Kings Cross, 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 Kings Cross?

An extension builder in Kings Cross 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 Kings Cross 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 Kings Cross?

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 Kings Cross 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 Kings Cross 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 Kings Cross

Can an extension builder in Kings Cross help with planning permission?

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

Many Kings Cross 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 Kings Cross help with materials and finishes?

Yes, most extension builders in Kings Cross 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.