Extension builders in New Cross

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 reviews)

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Some of our top rated extension builders in New Cross

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Renobuild Sussex
Sponsored
Rating: 5 out of 5
Extension Builder in New Cross
Renobuild Group is a small business operating locally. Our quotations are presented in a concise way, with a detailed breakdown following the build phase of each project. We pride ourselves on consistently providing great value for money and high quality workmanship.
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Latest review:
Restoration & Refurbishment- 11 Sep 2026
We are still in the midst of the build but it is worth noting Daniel and the team have been flexible and engaging, providing more than helpful advisory. Would highly recommend Daniel and Renobuild given the approach and how they understand the client.
ASAR PLUMBING AND BUILDING
Rating: 5 out of 5
Extension Builder in New Cross
I am a qualified plumbing heating engineer and General builder, i have learned my trade working for a plumbing / building company for 15 years. i have also been Nescot College for four years where i gained my qualification. I am hard working person, honest, trustworthy and take pride of my job. Customer satisfaction is my top priority.
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Latest review:
Extensions- 17 Mar 2024
Agim and his team were great - communicated what they would do at each stage, the timing, materials needed etc., no major surprises. The building is quite old and wonky in places so they had to work with that and the finished result looks great. Very happy and have would recommend Agim again!
S.k Building & Decorating Services
Rating: 5 out of 5
Extension Builder in New Cross
S.K Building & Decorating Services Ltd is a London-based building company specialising in a diverse range of construction services. With a focus on delivering high-quality results, the company excels in Extension building, Property refurbishment, Bathroom installation and Kitchen installation. Renowned for their expertise and commitment to customer satisfaction, S.K Building & Decorating Services Ltd has established itself as a reliable choice for clients seeking professional construction solutions in the London area. Whether it’s expanding living spaces through extensions, revitalising properties with refurbishment, or creating functional and stylish kitchens and bathrooms, S.K Building & Decorating Services Ltd stands out as a reliable partner in the construction and renovation industry. Get in contact now for a free no obligation quote!
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Latest review:
Restoration & Refurbishment- 7 Apr 2025
Senad and his team did a great job. They completed the project quickly and left the flat and common parts clean and tidy. Really happy with their work and would recommend. Hope to use them again.
Ernest Sergy Building Services Ltd
Rating: 5 out of 5
Extension Builder in New Cross
Ernest Sergy Building Services LTD is a general building company specialising in demolition, structural and ground work, interior and exterior refurbishments, renovations, loft conversions, extensions and other aspects of general building work.
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Latest review:
Extensions- 26 Aug 2022
Very happy with the work from Ernest. Nothing was too much trouble, and any issues along the way he just sorted. The team worked extremely hard and were all polite. I’d really recommend working with Ernest and his team and will be using him again for sure.
Tafix ltd
Rating: 5 out of 5
Extension Builder in New Cross
Hello, Tafix Ltd is specialised in carpentry and joinery jobs. We have a well-earned reputation for being punctual, reliable and completely trustworthy. Our team of skilled workers is always happy to help you with your project.
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Latest review:
Kitchen Fitting- 29 Nov 2020
Very satisfied with Tafix. Rewire, kitchen refurbishment and flat redecoration. Kamil and his team were extremely punctual and delivered high quality results. Step by step approach with impressive attention to detail. Creative in finding solutions to unexpected problems that arose. Kamil was proactive in advising on work outside of scope and happy to accommodate extra jobs where possible. Would recommend to others and will look to use for future work.
Ekd Construction Ltd
Rating: 5 out of 5
Extension Builder in New Cross
We create and improve spaces through collaborative partnerships with our clients and meticulous, professional craftsmanship. We ensure every project reflects both your vision and our shared values. And we know the business process from start to finish. Works we carry out: Interior & exterior painting • Wallpaper hanging & removal • Woodwork, staining & sealing • Kitchens, cupboards & decking Commercial spaces • Colour consultation • Damage repair & mould treatment • Stud partitions • Joists • Sub-floors • Door frames • Staircase fitting • Engineered flooring • Doors • Skirting Architraves • Kitchen fitting • Bespoke cabinetry • Decking • Custom work • Windows • Flat roofs
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Latest review:
Painting & Decorating- 7 Sep 2026
Thank you Kaylum. Refurbished windows look great. Excellent job. Harley
Kinship homes ltd
Rating: 4.8 out of 5
Extension Builder in New Cross
KinshipHomes Ltd delivers reliable home maintenance, emergency repair services, and high-quality bathroom installations across London. Our work covers everything from urgent plumbing callouts to full bathroom renovation projects, carried out by skilled, DBS-checked professionals you can trust. Alongside our maintenance division, we also operate a dedicated structural and building division, enabling us to take on larger projects including extensions, structural alterations, and full property refurbishments. This gives clients a single, coordinated contractor for both reactive works and major construction projects. In a short period on MyBuilder, we have achieved over 100 five-star reviews, reflecting consistent workmanship, clear communication, and strong customer satisfaction. Our teams are experienced across all key trades, including plumbing, tiling, bathroom refurbishments, and general home improvements, ensuring every project is delivered to a high standard from start to finish. KinshipHomes Ltd is built on reliability, technical capability, and attention to detail, making us a trusted choice for homeowners across London seeking both everyday maintenance support and complex building works delivered professionally.
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Latest review:
Bathroom Fitting- 1 Sep 2026
Sadly…Still have the bath tap leaking. Flooded the bathroom and kitchen Broke the thermostat for the central heating. Condemned my cent heating and now need a new heater £4,000+ The freeze kit didn’t work and should have used the proper machine instead of a temporary Quickfit kit smh and then many times coming to do the job properly (even got a gas engineer that wanted to charge £150 for a job not done grrr)… £801 charged for a new sink to be installed… yes it’s a old flat (like said in the description). Very disappointed for an expensive job that’s not properly done, even now… can’t be bothered to call him back in case it’s more money. We come to these sites expecting true professional…
A.R.Renovators
Rating: 5 out of 5
Extension Builder in New Cross
We are a family-run team made up of an experienced Architectural Technician and a skilled site manager and builder with over 20 years of experience delivering high-quality renovation services across London. Combining technical expertise with hands-on construction knowledge, we’re committed to providing reliable, professional service with attention to detail at every stage. We take pride in meeting deadlines, staying within budget, and exceeding client expectations through clear communication and quality workmanship.
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Latest review:
Conversions - General- 31 Jul 2026
Alonso was fantastic , very knowledgable . Still using him on other jobs currently
E.M.Morgan & Sons Property Development
Rating: 5 out of 5
Extension Builder in New Cross
E.M.Morgan & Sons are General Builders, established since 1979. Specialised in all the General Building Works We are members of the F.M.B. All our works carries our Builders Guarantee Certificate. Look no further if you need a professional work carried out.
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Latest review:
Extensions- 9 Mar 2023
Currently pricing my project. Excellent response and recommend
george building
Rating: 5 out of 5
Extension Builder in New Cross
With over 25 years of experience in the construction industry, I specialise in bathroom installations, kitchen fitting, and full interior renovations. I work across London, covering South East London and Central London, including Lewisham, Greenwich, Catford, Deptford, Peckham, Canary Wharf, London Bridge, Westminster, and surrounding areas. My services include: * Bathroom installations and refurbishments * Kitchen fitting and renovations * Full interior renovations * Tiling and finishing work * General refurbishment projects I take pride in delivering reliable, clean, and high-quality workmanship on every project. Attention to detail, good communication, and customer satisfaction are at the heart of my work. I always aim to complete projects on time, within budget, and to the highest standard.
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Latest review:
Bathroom Fitting- 21 Sep 2026
⭐ ⭐ ⭐ ⭐ ⭐ Really pleased The job ended up being a little more involved than originally expected, particularly after problems with the existing flooring and some older plumbing were uncovered. That said, Gheorghe worked incredibly hard throughout and clearly cared about getting the bathroom finished properly rather than cutting corners. He kept us updated when issues came up, helped source replacement tiles when matching the existing ones proved difficult, and dealt with several unexpected problems along the way. Most importantly, we’re really pleased with the finished bathroom. The quality of the work and attention to detail are excellent, and it’s clear how much effort went into it. Gheorghe was friendly, hardworking and committed to leaving us with a bathroom we were really happy with.
Gino Construction Ltd
Rating: 5 out of 5
Extension Builder in New Cross
Hi there! Thanks for stopping by, hoping you will like what we provide. We offer FRIENDLY AND PROFESSIONAL services in the construction industry; dealing with Domestic and Commercial premises. Please don't hesitate in getting in touch for a Free quote and Advice. Our Friendly and professional approach is unbeatable, Guaranteed! To have a peace of mind , all works GUARANTEED and FULLY Insured.
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Latest review:
Repointing- 2 Sep 2024
Gino is a very good communicator, honest, reliable, and always arrives at the site on time. His work repairing our road-facing brick wall and hanging a new wrought iron gate was to a very good standard. Would recommend him.
Archicon Ltd
Rating: 5 out of 5
Extension Builder in New Cross
Archicon Ltd is a newly launched company with several years of experience and academic expertise in the construction industry. At Archicon Ltd, we specialise in delivering comprehensive design and build projects, offering a seamless integration of architecture and construction. Our services include architectural and building control drawings, as well as refurbishment and construction solutions. With a deep understanding of the industry, backed by extensive experience, we pride ourselves on creating bespoke solutions that meet our clients' unique needs. Our team is committed to producing designs that are not only aesthetically pleasing but also functional, sustainable, and compliant with all regulatory standards. At Archicon Ltd, we believe that successful projects are built on strong collaboration. By listening to our clients and understanding their vision, we create spaces that truly reflect their aspirations. Whether you require innovative architectural designs, detailed drawings, or refurbishment services, Archicon Ltd is here to bring your ideas to life.
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Latest review:
Archicon did a superb job of what was a tricky build. They reinforced joists and met every challenge and set back to finish the job on time! Which was remarkable. The work is exceptional with great care over the details. I am delighted and whole heartedly recommend them for their professionalism and skill.
Genesis London
Rating: 4.8 out of 5
Extension Builder in New Cross
We are more than a building company; we are the artisans of space transformation. Our passion for construction and design is reflected in our specialisation in exquisite kitchen and bathroom installations, comprehensive full-scale refurbishments, and bespoke extensions that enhance your living space. Our expertise extends to loft conversions, where we create functional and stylish additional areas within your home. We take pride in our property development projects, expertly converting buildings into modern, segmented flats, each with its own unique character. Understanding the essence of a personalised touch, we create bespoke built-in wardrobes and shelving units that blend seamlessly with your interiors. Our custom glazing solutions promise not only utility but elegance that complements the aesthetic of your space. Sustainability and innovation are at the heart of what we do. We are innovators in designing and creating reclaimed wood furniture, bringing together environmental consciousness and contemporary design. Our wall-mounted beds are a testament to our commitment to space-saving solutions without compromising on style or comfort. Choose us for a partnership where your vision is our blueprint. From inception to execution, we ensure a service that is as reliable and steadfast as the structures we create.
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Latest review:
Restoration & Refurbishment- 9 Apr 2024
Hector, Elvis and Fabian did a fantastic job renovating our flat. They laid new tiles in our entryway, solved a number of issues with our flooring, removed an old gas pipe and repainted the walls and woodwork in our hallway. We were really impressed with their professionalism and not only did they do a fantastic job but they were a pleasure to have in our home. Very respectful, friendly and knowledgable. They even finished ahead of schedule. We would highly recommend them and would definitely have them back the next time we do a home renovation project.
REALTOP LTD
Rating: 5 out of 5
Extension Builder in New Cross
Good morning, Realtop Ltd provides commercial and domestic full refurbishment services, helping clients bring their dream spaces to life through our experienced and professional team. Our services include painting and decorating, interior design support, bespoke fitted solutions, flooring installation, white walling, composite and hygienic cladding, door installation, and general refurbishment works. Please note that being shortlisted causes us to pay a lead fee, so kindly shortlist us only if the estimated cost I have offered is suitable for your budget.
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Latest review:
Kitchen Fitting- 17 Sep 2026
Vincent recently fitted a new kitchen, hung interior doors, and installed architraving in our home, and his work was absolutely excellent. He has a fantastic eye for detail, resulting in a flawlessly fitted kitchen and perfectly aligned woodwork. He was professional, tidy, and hard-working from start to finish. If you need a reliable, top-tier carpenter, I cannot recommend Vincent highly enough!
Artesão Bespoke Carpentry
Rating: 5 out of 5
Extension Builder in New Cross
Hi I’m a carpenter of 20 years, who has worked on various sized projects, from home refurbishments to big site new builds. I carry out all aspects of carpentry, to name a few: kitchen fitting, bespoke wardrobes, tv units, book cases, laying floors. I am a reliable, trust worthy individual, with my own transport, working in and around London. Happy to offer free quotations.
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Latest review:
Bathroom Fitting- 29 Apr 2023
Many thanks to Kris abd Kane on a job well done. Despite the very tight schedule, they completely refurbished our bathroom transforming it to a high-end (hotel standard) wet room. Kris's original quote was very competitive. There were extras, but these were very reasonable. Once the job was completed Kris actually came back to install 4 or 5 grab bars without additional cost. Kris, and Kane are both very easy to get on with; thoughtful and calm characters. I travelled abroad during the job; Kris contacted me regularly and responded promptly when I reached out to him. As with any job' there were glitches but Kris's solution focus approach ensured a good outcome. Hope to work with this company again.
GRB Building and Home Improvements
Rating: 5 out of 5
Extension Builder in New Cross
At GRB Home Improvements we have over 15 Years experience in general building contracting including extensions, kitchen and bathroom refits, loft conversions, garden landscaping, patios and outbuildings, drainage and groundwork, drives and general building maintenance. We passionately believe in customer satisfaction and strive to ensure that our quality work is delivered on time, as per the agreed schedule, and that we come in on budget.
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Latest review:
Carpentry- 24 Jan 2021
George came to do up our hallway. He laid flooring and installed new spindles and a handrail on our stairs too. He did a wonderful job on the whole lot and we were very happy with him. We were awkward and changed our mind on the first laminate flooring that I had picked out online, he ripped it up and started again with the new flooring we picked and it was no hassle to him. George is a lovely fella, trustworthy and professional. Would highly recommend
Plus a space LLP
Rating: 5 out of 5
Extension Builder in New Cross
Loft convention Kitchen extension Complete house renovation HMO Conversation work Electric installation Heating and plumbing
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Latest review:
Bathroom Fitting- 17 Jan 2020
Did a great job. Was on time, polite & friendly. Worked in a clean and tidy manner. Charged the price he quoted and even went out of his way to get extra parts I needed. Many thanks.

4.2

Top rated Extension Builders

Our Extension Builders in New Cross, are rated 4.2 out of 5 based on 19 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.