Extension Builders in New Cross

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (18 reviews)

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Some of our top rated extension builders in New Cross

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SEASOUTH BUILDS LIMITED
Rating: 5 out of 5
Extension Builder in New Cross
At Seasouth Builds, we bring over 5 years of hands-on experience in the building and construction industry. Known for our loyalty, reliability, and attention to detail, we take pride in delivering high-quality workmanship on every project
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Latest review:
Tiling- 24 Sep 2025
I hired seasouth builds because not only did he give a really reasonable quote, but he also had knowledge of tiling over retrofit underfloor heating - which other tilers seemed to be really hesitant to work with. The job was done to an excellent standard - he’s a real perfectionist. It did take a bit longer than expected, due to some floor level issues which he didn’t account for when he quoted. I was really worried about the price increasing out of my budget when we started running over time, but I was so grateful to find that he was a really honest guy who stuck to the agreed quote and didn’t try to make it my problem one little bit. He was polite and friendly throughout the whole job, turned up whenever he said he would, and kept in constant contact. Really honest (I happily left him unattended in my property). Customer service was excellent, nothing was too much trouble. 10/10 would recommend.
Victor & Co.
Rating: 5 out of 5
Extension Builder in New Cross
Victor & Co has operated throughout London successfully for over twenty years. We are determined to maximaze our customer’s satisfaction by fulfilling their wishes to their specification, rather than forcing a compromise. Our team is build up of successfully from disparate areas of the trade and together we have all the skills necessary to successfully carry out any work asked for us. We do have flexible approach to many issues ready to find solutions to most difficult matters.
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Latest review:
Extensions- 9 Nov 2021
I had a great experience hiring Victor & Co. They built a Rear Garden Extension in my house with excellent standards and finishing. Also they have done everything on time, which I know is quite difficult. I met Victor, the director of the project, every week to discuss the progress and any alterations to the original plans. He was great at explaining all the options and delivering the work. All the builders were very polite and you could see that they were very well organised with all the tools and building materials they brought to the house. When there were minor delays they were happy to come on weekends to catch up with the programmed finishing time. For the level of noise you could expect a building site can generate they were incredibly quiet. Last and not least, the quote I have from them was one of the most competitive ones I found in the market, so I can definitely recommend this company to anybody that is planning a big project.
Akili_handyman
Rating: 5 out of 5
Extension Builder in New Cross
Hi, I’m Akili — a friendly, reliable tradesman with over 8 years’ experience. I take pride in high-quality work at fair prices, and I guarantee all my jobs. Skilled in plastering, tiling, decorating, roofing, and full refurbishments — no job too small or big. Quality, honesty, and respect in every project. 👍
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Latest review:
Restoration & Refurbishment- 8 Jul 2026
Very happy working with Akili. Love his attention for details. Highly reccomended!!
Complete Construction london
Rating: 5 out of 5
Extension Builder in New Cross
At Complete Construction we have a complete team to undertake all building and renovation works.We have been trading over 12 years,and forever growing.Priding ourselves on reputation and reviews and can offer plenty of references from recent clients.Having been known to have the team you want on your project,we are now being prided on our unbelievable Painting and decorating team
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Latest review:
Restoration & Refurbishment- 16 Jun 2023
Amazing job by Ross and his team! They're easy to deal with and the job was completed on time and to budget :) Will definitely use again! Thank you so much!
Jhoan
Rating: 4.5 out of 5
Extension Builder in New Cross
6-7 years experiences. I’ve got experiences in:plastering,tilles,plasterboard,painting,brickwork,paving,flooring etc at low price... I’m doing good job working hard and low price
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Latest review:
Extensions- 11 Apr 2022
ionut danciu did a very good job of building the concrete base and summer house. It was not the easiest of tasks as he had to carry all the sand and concrete through the house but did it happily. Would definitely recommend for any building work.
PLANNING APP LTD
Rating: 5 out of 5
Extension Builder in New Cross
We create architectural drawings. We are specialised in applications for planning permission and building regulations and co-operate with local structural engineers for structural calculations, party wall surveyors and building companies. Our projects include extensions, lofts, garages, house&flat conversions in different councils all around London. If you are thinking of extending, converting, or splitting your property do not hesitate to contact us for a free first consultation & quotation.
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Latest review:
CAD / Drawings- 23 Sep 2020
Marius has been doing a great job and put in an extra effort to ensure we were happy with the outcome. I can not recommend Marius highly enough, especially as he managed to fix an issue with the council that we had from someone else drawings. He was patient and very well prepared. Went an extra mile and gave us different ideas/options. He was flexible with timings and most importantly with price. Had by far the best quote and did an exceptional job.
Full Circle Renovation Ltd.
Rating: 4.9 out of 5
Extension Builder in New Cross
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.
Daren Love
Rating: 5 out of 5
Extension Builder in New Cross
I've 35 years experience in the building trade. I'm tidy conscientious and reliable. I've recently left my old company of 12 years,where I was a working foreman, doing extensions, refurbs and patios
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Latest review:
Bricklaying- 20 Jun 2024
I needed a couple of front garden walls built and I contacted Darren. Darren has a great scope of knowledge and experience in brick laying. He is very attentive to detail and gave good advice. Great work Darren 😀
Abigail Construction
Rating: 4.7 out of 5
Extension Builder in New Cross
General builders and brickwork contractors specialist in garden walls, extensions, conservatories, structural alterations, drainage, toilets, conversions. We've been in business over 30 years and cover most aspects of domestic home improvements.All our staff are fully qualified tradesmen and we carry one million pounds of public liability insurance (details are available on request)
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Latest review:
Extensions- 3 Feb 2021
Gavin built me an outhouse at the bottom of the garden. The work was tidy and efficient and the result just what we agreed. This involved brickwork, carpentry and electrics, and all was done to a good standard and in a reasonable timeframe, even despite the snow! I would recommend Gavin to do this sort of work and would use him again if needed.
SDS CARPENTRY & BUILDING SERVICES LTD
Rating: 5 out of 5
Extension Builder in New Cross
SDS CARPENTRY & BUILDING SERVICES LTD is a team of qualified builders with over 15 years of experience and have all the skills necessary to take on board any building project at an extremely high standard. Yes, we’ll add real value, save you time and effort, keep disruption to a minimum and manage the project from design to final-fit. Our clients choose us because we have exceptional customer service and can deliver projects on time and within budget.
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Latest review:
Carpentry- 9 May 2020
I had a parquet floor laid and was very pleased with the result and attention to detail. Sergiu worked very hard and was a pleasure to deal with.
Onyx Construct Limited
Rating: 5 out of 5
Extension Builder in New Cross
We are a multi-trade construction company operated in domestic sector and we are able to full-fill any building requirement. The scope of projects we have delivered in the past spans from smallest jobs like kitchen or bathroom fitting to extensions, house refurbishments or loft conversions.The majority of our previous clients were extremely satisfied with high standard and quality of work. If you are looking for professionals builders with reasonable prices - you are on the right profile !
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Latest review:
Extensions- 29 Nov 2023
We had the most fantastic experience with Sarunas. He was highly professional from start to finish and completed the work to the highest standard. We extended our project significantly once we realised how excellent he was and he has now renovated our whole home over an 18 month period. He was able to guide us through the process and help us make key decisions which made the experience smooth and efficient. He is extremely skilled in all aspects of building, has high attention to detail and is a pleasure to have in your home! I couldn't recommend him higher and look forward to having him back in future to convert our loft!
URBAN SPACE BUILDING & PLUMBING LTD
Rating: 5 out of 5
Extension Builder in New Cross
We are a well-established local building company with professional tradesmen. We specialise in all aspects of residential building works and refurbishments such as bathroom, kitchen & full refurbishments, as well as loft conversions & extensions. We have an in house team of experienced and professional tradesmen with skills to complete any project to high standards, on time and within budget. All our work is guaranteed, and we are happy to supply references on request.
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Latest review:
Extensions- 19 Apr 2021
Michael and the team were really enthusiastic and professional throughout. The standard of finishes throughout the project is really high and the guys went the extra miles to get the project finished on time. Michael has also been great with coming round to sort any "teething problem" promptly and helping out with some follow up works.
KUBEL LTD
Rating: 5 out of 5
Extension Builder in New Cross
Welcome to KUBEL LTD, your trusted partner for all your construction and renovation needs. We specialise in building and renovating extensions, roofs, and gardens to transform your home into your dream space. With our expertise and dedication to quality, you can trust that your project will be completed on time and to your satisfaction.
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Latest review:
Wonderful and honest. Excellent finish.
WS Building
Rating: 4.8 out of 5
Extension Builder in New Cross
I am Builder with 30 years experience in all kind of building projects.Together with my team we can provide for you a complete building service and help with advice in any aspects of building works. We specialise in: conversions, extensions, renovations, reconfigurations, basements, lofts, new kitchens and bathrooms, flooring , doors, gardening, demolition works, roofing, steel installation, plastering, painting and decorating and all others of building works included electric and plumbing.
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Latest review:
Restoration & Refurbishment- 10 Nov 2025
Professional and on time, recommended
Ajila Limited
Rating: 4.5 out of 5
Extension Builder in New Cross
Ajila Limited is a professional construction company specializing in house refurbishment. With a commitment to quality craftsmanship and attention to detail, we transform homes to meet the highest standards of functionality and style. Whether it's a full renovation or specific improvements, our experienced team delivers exceptional results that enhance both the beauty and value of your property. The company engages in multiple trades which includes plumbing, kitchen, bathroom, tiling, extension, home refurbishment etc
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Latest review:
Plumbing- 2 Apr 2025
Great service and good price. Thank you
Buildstead Development Ltd
Rating: 5 out of 5
Extension Builder in New Cross
Our team at Buildstead has over 25 years of experience in the construction industry covering a wide range of project types. We truly are your "one-stop shop" when it comes to your project. From design to build, we pride ourselves on our integrity, the quality of our work and the working relationship we enjoy with our clients. With full project management included, you will be kept up to date at each step along the way ensuring complete peace of mind.
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Latest review:
Kitchen Fitting- 5 Nov 2020
An incredibly positive experience from start to finish. I found Robbie and team were hard workers, very likeable and provided brilliant results. Comms throughout were excellent. With Robbie happy to discuss the job over the phone beforehand and put our minds at ease. A big shout out to the team for undertaking this work during COVID. We understand the pressures this places on our tradespeople and we thank Robbie and his team for their diligence and commitment to wearing masks in our home and working safely. A brilliant experience.

3.9

Top rated Extension Builders

Our Extension Builders in New Cross, are rated 3.9 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 New 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 New 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 New Cross who are available and interested can respond to your post.

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

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

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

Find extension builders in New Cross with MyBuilder

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

Step 2: Compare different extension builders in New Cross

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

Step 3: Hire New Cross extension builders with confidence

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

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

What to ask a New Cross extension builder before hiring?

Before hiring an extension builder in New Cross or extension building company in New 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 New Cross?

An extension builder in New 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 New 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 New 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 New 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 New 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 New Cross

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

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

Many New 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 New Cross help with materials and finishes?

Yes, most extension builders in New 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.