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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tops developments
Rating: 4.9 out of 5
Extension Builder in New Cross
We undertake all type off building work, plumbing, heating, gas works,kitchens, bathrooms, refurbishment, extension, and small jobs. With over 8 years experience in industry, work warranties, qualified professionals. Our subcontractors and employees are professionals with experience. We are looking forward to hear from you. Thank you.
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Latest review:
Gas Work- 23 Dec 2025
Friendly, professional and fair with good communication. Would recommend
Pro West Construction Ltd
No reviews yet
Extension Builder in New Cross
ProWest Construction – Building with Strength, Precision, and Trust ProWest Construction is a professional and forward-thinking construction company dedicated to delivering high-quality building solutions across residential, commercial, and refurbishment sectors. Built on strong foundations of integrity, reliability, and craftsmanship, we pride ourselves on providing exceptional service and outstanding results on every project we undertake. At ProWest Construction, we believe construction is more than assembling materials — it is about creating spaces that support lifestyles, businesses, and communities. Every project represents a client’s vision and investment, and we treat that responsibility with the highest level of professionalism and care. Our Services ProWest Construction offers a comprehensive range of services designed to meet the needs of private homeowners, developers, and commercial clients. Residential Construction, Refurbishment & Structural Alterations Why Choose ProWest Construction? Clients choose ProWest Construction for: • Professional and reliable service • High-quality craftsmanship • Transparent pricing and budgeting • Strong project management • On-time project delivery • Full regulatory compliance
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H & A Rail ltd
Rating: 5 out of 5
Extension Builder in New Cross
We are a Civil Engineering Contractor
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Latest review:
Groundwork & Foundations- 22 Dec 2021
I couldn't have asked for more from this firm.... called when they said they would, arrived early and did everything they could to take away the stress of this stavr in my build. Clean and tidy works, pleasant and polite workforce. I will always use this firm for my work and highly recommend them
BuilderMaan Limited
No reviews yet
Extension Builder in New Cross
We are a new company who have experienced builders for over 10 years specialising in residential building work. We have successfully completed projects which include whole house renovation to smaller work such as single storey extensions and garages. We have a highly dedicated team who pride themselves in creating the customers needs within the most competitive rates in the market.
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Painter
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Extension Builder in New Cross
I’m painter for 20 years
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KC Carpentry and Building Services Ltd
No reviews yet
Extension Builder in New Cross
KC Carpentry and Building Services Ltd is a Essex-based carpentry and building company providing high-quality workmanship with a friendly, reliable approach. Founded by Kane Cavener, a 30-year-old carpenter and father of two, the company combines strong traditional craft skills with modern professionalism. We specialise in carpentry, renovations, extensions, and general building work, always focusing on clear communication, attention to detail, and building long-lasting relationships with our clients.
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B.E Home Improvements
Rating: 5 out of 5
Extension Builder in New Cross
Local building company. Loft specialists with a decade of experience. Why move out when you can move up? Complete loft packages available from plans to completion. Will work off your plans.
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Latest review:
Loft Conversion- 20 Jan 2026
I have chosen Byron and his company to complete my loft conversion. Job was completed within given time frame. Byron and the team were polite and hard working. During the building time, any issues found by myself were addressed and rectified as much as possible. At the closing weeks of my project, I have asked Byron to complete additional carpentry tasks. He found the time to accommodate my requests. Job had some messy stages but Byron was always trying to leave site clean as much as it was reasonably possible. Thank you for your work and I would be happy to hire you again in the future.
Trace Design & Build Ltd
No reviews yet
Extension Builder in New Cross
Trace Design & Build Ltd are a chartered RIBA architects practice and construction company that offer a full and comprehensive design and build service. We are also a GasSafe registered company offering central heating and boiler installation, service and breakdown repairs. We have an in house team of operatives covering all aspects of building work, project management and maintenance.
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MMC Mesi’s Maintenance LTD
Rating: 5 out of 5
Extension Builder in New Cross
Renovating houses extensions quarters decorating bathrooms instalment kitchen instalment
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Latest review:
Bathroom Fitting- 5 Apr 2022
A good experience, a quality job at a competitive price
Base right construction
No reviews yet
Extension Builder in New Cross
We are family run building company who cover all types of building. We do extentions, new builds, landscaping and conservatories. We have been running for 30 years and have built up a good reputation around all areas.
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MkPlasteringServices
No reviews yet
Extension Builder in New Cross
Covering All aspects of plastering, rendering and damp proofing. fully insured and over 10 years experience
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Synergy Building Services Limited
No reviews yet
Extension Builder in New Cross
Hi We are building company that has been around West London & North London for around 30 years. We have recently taken the step to advertise on the digital space with the majority of our work, coming from referrals and word-of-mouth. We are looking forward to advertising on this platform. We specialise in all forms of construction, whether that be loft conversions or ground up structures, painting & decorating, electric or plumbing works, and everything in between.
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H&R construction
No reviews yet
Extension Builder in New Cross
Small enough to care big enough to cope!!
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Ss digging & building development limited
Rating: 4 out of 5
Extension Builder in New Cross
I’m a General construction builder ,I have 15 years experience to undertake Ground work ,New extension ,loft conversion ,summerhouses and all type of related construction work .
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Latest review:
Extensions- 22 May 2021
I was left in a mess by cowboy builders. I found Sukhvindsr Singh from mybuilders and then I had nothing to worry about. He completed the project with utmost responsibility from erecting heavy steals to all the way up to finish. I was amazed with the level of his skills and above all honesty. This was a massive 66sqm single storey extension and he put up structure, brickwork, fibreglass roof , underfloor heating , tiling,electric work . He even went beyond our agreement to do bits and pieces to make sure i donot get stressed out. I have given him another job in same property to do patio 88Sqm with porceline tiling. Feature wall prepared by him stood out . Highly recommended and i will be surprised if he does recieve similar feedback in his future jobs.
bifold and sliding doors
No reviews yet
Extension Builder in New Cross
We supply and install a wide range of Premium Glazing Solutions, bespoke to your requirements. Our products include Skylights, Sliding Doors, Bi-Folding Doors, French Doors and Aluminium Heritage Glazing. When working with us you may expect a friendly attitude combined with professionalism as well as an innovative approach towards your goals. Your final satisfaction is at paramount importance to us.
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Ktech Group LTD
Rating: 5 out of 5
Extension Builder in New Cross
We are a construction company that specialises in compliance works and social housing. We work with the best engineers to ensure our projects are carried out successfully with the best appraisal possible. Contact us today to discuss your project and set up a consultation. Our service areas include London, Kent and Southern East counties.
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Latest review:
Carpentry- 7 Aug 2025
Ash and his team from Ktech did a great job installing the flitch beam to structural spec. The job required real effort, coordination and attention to detail and they delivered. Professional, reliable and easy to work with. I’d strongly recommend them.

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.