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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JIMGOS Maintenance LTD
Rating: 4.4 out of 5
Extension Builder in Kings Cross
Jimgos Maintenance Ltd is a London-based property maintenance company delivering reliable, high-quality services across a wide range of trades. We specialise in residential and rental property works, supporting homeowners, landlords, and managing agents with both reactive and planned maintenance. * Gas & heating – boiler installations, servicing, gas safety certificates (CP12), heating system repairs * Plumbing – leak detection, pipework repairs, bathroom installations, drainage solutions * General building & refurbishment – tiling, plastering, painting & decorating, kitchen and bathroom upgrades We understand the importance of compliance, safety, and clear communication, especially when working within tenanted properties. Our team ensures all work is carried out in line with current UK regulations and industry standards.
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Latest review:
Electrical- 14 Jul 2026
Completed professionally
TSO Building Services
Rating: 5 out of 5
Extension Builder in Kings Cross
Hi, we are a family business and have been renovating and maintaining properties for over 9 years. From changing sockets, hanging light fittings, hanging doors, painting and decorating (in&out)to full bathroom or kitchen installations and extensions we are here to help.
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Latest review:
Bathroom Fitting- 26 Jan 2019
Would certainly highly recommend! Trustworthy company I would gladly use again for other jobs. Keep to the quote. High quality job from start to finish, hard working guys who get the job done in great time! Had a new bathroom built in my large bedroom and tiled downstairs bathroom and kitchen. Happy with end product.
Raj
Rating: 5 out of 5
Extension Builder in Kings Cross
I’m a builder with many trades I will do anything you like
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Latest review:
Demolition- 26 May 2026
Raj and his team did a fantastic job demolishing my concrete shed and brick flowerbed, and really efficiently in the middle of a heatwave! He didn’t reschedule, was honest and really friendly. Top class service, I highly recommend.
Adam Daniel LTD
No reviews yet
Extension Builder in Kings Cross
Cliden Construction LDN is a small, London-based construction company specialising in high-end domestic refurbishments. With a passion for quality and attention to detail, we work closely with discerning clients across London to transform their homes into exceptional living spaces. Whether it’s a complete structural refurbishment, a luxury kitchen or bathroom renovation, or a full interior overhaul, we pride ourselves on delivering outstanding results that exceed expectations. As a boutique construction firm, we offer a highly personalised service. You will deal directly with experienced professionals who care about every aspect of your project — from the initial design consultation through to the final finishing touches. We only use premium materials and trusted specialist tradesmen to ensure a flawless finish every time. At Cliden Construction LDN, we understand that your home is one of your most important investments. That’s why we are committed to the highest standards of craftsmanship, reliability, and client satisfaction on every project we undertake. We look forward to the opportunity to bring your vision to life.
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Singh Delivers Ltd
Rating: 5 out of 5
Extension Builder in Kings Cross
I love to install carpets. Carpet isn’t just a floor but a lifestyle. I specialise in carpet fitting and maintenance. I tend to provide quality work for clients through years of experience. Every job requires a coordination between client and company, and this is how I work by coordinating with client because end of the day client would be looking at work and shouldn’t have any second thoughts.
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Latest review:
Painting & Decorating- 23 Feb 2026
Good job, delivered fast at a good price. Many thanks!
S&H construction London
Rating: 5 out of 5
Extension Builder in Kings Cross
We are small family run business, we have over 20 years experience. We cover most work, plumbing, bathroom and kitchen fitting, plastering, ground work, tilling, brick layering and much more.
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Latest review:
Bathroom Fitting- 13 Oct 2024
Excellent company. Great job on our bathroom refurbishment.
Baqar’S limited
Rating: 4.7 out of 5
Extension Builder in Kings Cross
Welcome to Baqars Limited! We're here to provide you with top-quality service and solutions tailored to your needs. Thank you for choosing us!
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Latest review:
Tiling- 22 Jul 2025
Good service. Would recommend!
The Modular Building Company (london) Ltd
No reviews yet
Extension Builder in Kings Cross
We build modular buildings
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growchance com ltd
No reviews yet
Extension Builder in Kings Cross
Welcome to Growchance We are a property renovation and modernisation company based in London with over 15 years of experience. Our team is dedicated to transforming existing buildings into modern, functional spaces that meet the needs of our clients. We pride ourselves on our attention to detail and commitment to quality workmanship. We work closely with our clients to understand their vision and bring it to life, ensuring that every project is completed to the highest standard. Our team has extensive experience in all aspects of property renovation and modernisation, including structural repairs, electrical and plumbing work, and interior and exterior finishes. We have the expertise and resources to handle projects of all sizes, from small updates to major renovations. If you are looking to renovate or modernise your property, we would love to help. Contact us today to discuss your project and learn more about how we can assist you. Thank you for considering Growchance for your renovation needs.
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Skyline renovating ltd
No reviews yet
Extension Builder in Kings Cross
Welcome to Skyline Renovating Ltd. We specialise in renovation, construction, and development. We cover areas London and East Sussex.Our experienced team delivers high-quality projects on time and within budget. Whether updating your home or building new structures to developing properties, we bring your vision to life. Trust us to handle all your construction needs with professionalism and excellence.
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Payrosa Joinery Ltd
No reviews yet
Extension Builder in Kings Cross
We are a carpentry, joinery company, specialized in premium bespoke joinery. We use age-old expertise, combined with modern innovation to create up-to-date tailor-made joinery solutions. We overtake both residential and commercial works and look forward to working with you on your next project!
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BOTNARI CONSTRUCTION
Rating: 4.7 out of 5
Extension Builder in Kings Cross
We at BOTNARI CONSTRUCTION provide a service of maximum quality and client satisfaction . Having over 25 years experience in the field we have completed jobs big and small to the best standard .
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Latest review:
Garden Maintenance- 19 May 2026
Fantastic service . Very good job
MLCC
Rating: 5 out of 5
Extension Builder in Kings Cross
We offer quality works at competitive prices. We are a small team of professional builders with over 12 years of construction experience. Whether you are looking for painting a room or bathroom refurbishment or building a new extension - we can take care of it all. Please contact us today for a free no-obligation quote.
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Latest review:
Painting & Decorating- 27 Apr 2018
Claudiu and his team did an excellent job renovating our 2 bed flat in Bushey. He did a great job on the laminate flooring in particular. Installed coving, skirting, painted walls/doors/radiators, installed new light fixtures, and assembled furniture. Will definitely work with him again. In fact, I hired him back to do our bathroom next week!
Panoramic Homes Ltd.
Rating: 4.6 out of 5
Extension Builder in Kings Cross
With over 12 years of experience in Civil Engineering & Project Management, we are specialised in Architectural Planning, Structural Designs, construction, renovation and refurbishment works. We have a dedicated team for the type of works. Support from Architects and Civil Engineers, you get FREE professional advice. We are very competitive in the market and give assurance and guarantee of all works. You will have piece of mind with us as we will ensure quality managed work from start to finish.
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Latest review:
Extensions- 9 Aug 2021
After a long selection process, we decided on Muhammad Ansari of Panoramic Homes, and now the project has been completed, we ( as a family ), are happy and pleased we made the right choice. Trust, workmanship, good solid project management, and friendly reliable builders were all attributes we were looking for. All their references checked out, and came highly recommended ( which was important for me ), as I know I wouldn't be on site everyday. Our project was a rear extension, plus garden overhaul, plus a new drive, and a new front porch. Mo and Tonys team really did an excellent job and I we can't stop praising them to our friends and families . While the project was during the start of the pandemic, and continued throughout 2020, The team respected all the rules of engagement with the build, and my family during this difficult period. Which we very much appreciated ( especially the children ). So if your looking for a good solid managed project, with good pricing and good workmanship, and trusted and tidy builders, then I'm happy to recommend Panoramic Homes. I'll for sure send more people their way.
North Builders LTD
Rating: 4.8 out of 5
Extension Builder in Kings Cross
North Builders LTD have a team of specialists which gives you quality and high standard work on Loft conversions, Extensions, Roofing, Renovation, Refurbishment. We based in London and we cover all M25. With the best quality work and proffesional prices on the market we managed to make happy a lot of costumers around London and not only. Our priority is the costumer to be satisfied, the project to finish in timeline and on budget. Contact us for free quotes.
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Latest review:
Loft Conversion- 2 Nov 2025
Full loft conversion with dorma. Blerim always asked the right questions and made really good suggestions. Very helpful and great quality. Would happily recommend him and his team.
AJT Construction Beckenham Ltd
Rating: 5 out of 5
Extension Builder in Kings Cross
AJT CONSTRUCTION WE BUILD WHAT WE LOVE, AND WE LOVE WHAT WE DO With today’s uncertain economy choosing the right builder for your project has never been more important.From conception to final build and completion it is vital to work with a company that understands your needsand has expertise to deliver on time and within budget. For over 30 years, we have built an enviable reputation in Beckenham and the surrounding areas, successfullymanaging projects in the construction industry
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Latest review:
Extensions- 23 Mar 2022
Dealing with Jason was an absolute delight. He was punctal, provided some great advice and introduced me to a great conservatory manufacturer. Would definitely use him again for further building work. Highly recommend.

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.