Extension Builders in Kings Cross

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (19 reviews)

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Some of our top rated extension builders in Kings Cross

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Property Makeover Ltd
No reviews yet
Extension Builder in Kings Cross
For all property needs, there is Property Makeover Ltd. With our wealth of experience and in-depth expertise we are in a position to provide home improvement and property makeovers to the highest possible standard.
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Michal Palucki
Rating: 5 out of 5
Extension Builder in Kings Cross
I am a carpenter from trade, with 15 years of experience. My services include: new window installation /replacement /repairs, Internal and external door installation /replacement /repairs, Lock installation/change, glazing, adjustments, secures
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Latest review:
Windows & Doors (uPVC & Metal)- 20 Aug 2019
Great quality work and super accommodating! Highly recommend.
FFernandesConstruction
No reviews yet
Extension Builder in Kings Cross
Fernandes Constructions Hi, we have been in this trade 10 years We specialise in: painting and decorating wood flooring full bathrooms, full kitchens, electrical & plumbing house extensions Conservatory
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Davis-Brady construction limited
Rating: 5 out of 5
Extension Builder in Kings Cross
At Davis-Brady, we are more than just a construction company; we are a family-driven team dedicated to excellence in every project we undertake. With decades of collective experience in the industry, our skilled professionals specialize in design, electrical, plumbing, tiling, kitchen fitting, decorating, and carpentry services. Our commitment to quality craftsmanship, attention to detail, and client satisfaction sets us apart. Whether it's renovating a home, building a new space, or tackling a commercial project, we bring expertise, reliability, and a personal touch to every job. Trust Davis-Brady to bring your vision to life, one project at a time.
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Latest review:
Handyman- 11 Feb 2025
Brady & Cesar did an excellent job hanging/painting six internal doors. The door frames weren’t straight, which made the job more challenging, but they took the time to get everything just right. They were meticulous in their work, covering the floor to protect our home and ensuring everything was clean afterward. Both explained what they were doing throughout the process and provided a personable, professional service. Would highly recommend Davis-Brady Construction Limited
Dumitru
No reviews yet
Extension Builder in Kings Cross
Bricklayer
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Ava Constructions & Decors
Rating: 4.9 out of 5
Extension Builder in Kings Cross
Ava Constructions & Decors Ltd is a UK-based construction and renovation company committed to delivering top-quality craftsmanship and reliable project management. We specialise in full refurbishments, extensions, bathroom and kitchen installations, and commercial fit-outs — always tailored to the client’s vision and delivered to the highest UK building standards. With a keen focus on transparency, timelines, and customer satisfaction, Ava Constructions has earned the trust of homeowners, investors, and developers alike. Punctuality and completion of work on time are a priority .Our team always respect the client wishes and work with them to achieve the best possible results to their satisfaction. Thank you in advance
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Latest review:
Extensions- 16 Apr 2026
I would not recommend this builder based on my experience. Instead of using crushed concrete they used soil to fill the house flooring for underfloor heating. 1 The project suffered from poor communication, repeated delays, and a lack of clarity around responsibilities. There were serious issues with the foundation works, which failed Building Control inspection and now require remedial engineering input before works can proceed. The site was also left incomplete and not in an acceptable condition. Despite substantial payments being made, key documentation, technical responses, and follow-through were lacking, leaving me to resolve major compliance and structural issues independently. My experience has resulted in delay, additional cost, and considerable stress. I would strongly advise others to ensure there is a detailed written contract, clear scope of works, and defined accountability
Onyx Renovation & Design Ltd
No reviews yet
Extension Builder in Kings Cross
Specialists in extensions, loft conversions, full renovations, outbuildings, and landscaping. With a passion for excellence and craftsmanship, we deliver projects that blend durability, functionality, and aesthetics- transforming homes with precision and care.
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RD PAINTING & RENOVATIONS LTD
No reviews yet
Extension Builder in Kings Cross
RD Painting & Renovation provides professional painting and renovation services for homes and businesses. We handle everything from interior and exterior painting to repairs and remodels, always focusing on quality, reliability, and customer satisfaction. Our goal is to make every space look its best and meet the unique needs of each client.
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Jack Dagley
No reviews yet
Extension Builder in Kings Cross
HI
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Builder Cat LTD
Rating: 5 out of 5
Extension Builder in Kings Cross
Serdar has over 20 years of experience as a professional builder. His extensive experience includes Owner/Builder/Developer of his own company, many years Builder Cat Limited was founded by Serdar Aydinlar, who has since 1996 structural engineering and design experience. Serdar oversees the structure of each project, and monitors the careful execution of the design brief to ensure a flawless finish.
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Latest review:
Bathroom Fitting- 12 Jun 2019
Did a very good and efficient job with minimum fuss. I have asked the builder to quote for another job and do not have any hesitation in recommending this builder.
Singh design and build ltd
Rating: 4 out of 5
Extension Builder in Kings Cross
Hi we are here to provide you range of building work services from installing your kitchen tap to building your extension plumbing carpenter job.
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Latest review:
Carpentry- 28 Mar 2023
Thank you for the work,well done and would use again. Only downside was need to be tidier as adhesive dropped all over Amtico flooring! But that aside will still use again as long more sufficient dust cloths used etc
EZ Design and Build
No reviews yet
Extension Builder in Kings Cross
EZ Design and Build offer a complete solution from initial concept through to high end / luxury finishes. We are a design and build contractor, and can assist you with planning and designing the project, getting Planning Permission and statutory approvals. We can get involved at various stages of the project, and we boast a portfolio of beautiful projects, ranging from basement conversions, developing blocks of apartments, commercial fit outs to residential home conversions and extensions.
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a-z renovations and construction
No reviews yet
Extension Builder in Kings Cross
My name is Avni, Our company is called 'a-z renovations & construction' we take all different kind of projects whether they are small or big. all of our jobs are mainly recommended. our jobs are: Extensions, loft conversions, mezzanine floors, plastering and plumbing, wall & floor tiling, painting and decorating, kitchen and bathroom fitting, carpentry, patio and garden fixing. we cover London and home counties.
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grantconstruction0
New on MyBuilder
Extension Builder in Kings Cross
The construction company carries out and performs a full range of complex interior finishing works, general contracting for the repair and reconstruction of buildings and premises in commercial areas. The main direction in which the company operates is commercial real estate: shopping, entertainment and office centers, factories, hotels, logistics complexes and scattered throughout London will undertake any repair and restoration work. We use only high-quality materials and tools to ensure the highest quality of work, in addition, we always adhere to the agreed deadlines and budget, which allows our clients to be confident that the repair work will be completed on time and without unnecessary costs
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Triune Developers Ltd
No reviews yet
Extension Builder in Kings Cross
Triune Developers Ltd is a professional property development and building services company known for delivering high-quality workmanship and reliable project management from start to finish. With over 15 years of experience, we specialise in transforming properties through skilled construction, refurbishment, and decorative services. Our dedicated painting and decorating division is at the core of what we do. We provide premium interior and exterior finishes with exceptional attention to detail—whether it’s a full property renovation, a commercial space upgrade, or a single-room refresh. Every project is completed with preparation, precision, and a flawless finish that lasts. Alongside our specialist painting services, we offer a full range of building and development solutions, including: Property renovations & refurbishments. Home extensions & structural improvements. Kitchen and bathroom installations. Carpentry and joinery services. General building maintenance and repairs. We pride ourselves on being efficient, professional, and easy to work with. Our team works cleanly, communicates clearly, and respects timelines and budgets. The result is a smooth, stress-free experience and a finish that elevates the space.
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Sergio
Rating: 5 out of 5
Extension Builder in Kings Cross
Hi there !We are an experienced and reliable multi trader team covering the following aspects:glazing,SFS & extensions,flat roofs,any type of cladding,carpentry-all aspects, drylining,exterior /interior insulation installation & rendering,drainage systems & gutters ,plumbing & electrician ( registered and insure -domestic and industrial )and and general DIY jobs. We can help also with interior design and bespoke furniture fabrication of any type (domestic,commercial,offices,interlocking
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Latest review:
Insulation- 14 Feb 2023
I placed an add in mybuilder.com to have my house fully insulated and received many replies including one from Sergiu. After meeting him I felt he was the best placed person to carry out the work as he was the most knowledgeable and seemed to know all about the various types of insulation and which one I needed for my home. He fully explained the procedure from start to finish was always on time and tidied up at the end of each day.His work is second to none and the price was very very competitive in fact much less then the big companies were asking.I am extremely happy with the job and the standard of finish. Sergiu is very police professional and trustworthy and I would have no hesitation in recommending him to anyone on here to carry out work in your home.

4.1

Top rated Extension Builders

Our Extension Builders in Kings Cross, are rated 4.1 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 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.