Extension Builders in Dulwich

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 Dulwich

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ECOFRAME DIRECT LTD
No reviews yet
Extension Builder in Dulwich
EcoFrame Direct specialises in the supply and installation of high-quality windows and doors, including uPVC and aluminium windows, composite doors, sliding doors, and modern glazing solutions such as rooflights and roof lanterns for residential properties. We work across London, Surrey, Kent, East Sussex and West Sussex, delivering carefully planned installations with a strong focus on quality, compliance, and customer experience. Every project is approached properly — from accurate measuring and specification through to professional installation and aftercare. Our team has extensive hands-on experience within the glazing and construction industry, and all installations are carried out in line with current Building Regulations. We work with trusted manufacturers and proven systems to ensure excellent thermal performance, security, and long-term reliability. We’re happy to advise on design, layout, glazing options, and energy efficiency, taking the time to explain everything clearly before work begins. Finance options are available where required, and all work is backed by product and workmanship guarantees for complete peace of mind. Free quotations, clear pricing, and reliable communication from first enquiry to completion.
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G&M Building Contractors Essex Ltd
No reviews yet
Extension Builder in Dulwich
We are specialist building contractors for all residential and commercial fit out including design,Planning to completion. Specialist joiners & all aspects of carpentry Specialist Decorators All mechanical & groundworks.
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Garnet Construction Ltd
Rating: 4 out of 5
Extension Builder in Dulwich
Garnet Construction has over 10 years' experience in the industry and specialise in loft conversions, all types of extensions and complete renovations. Priority is given to the design and construction of all our projects with a unique obsession to strive for perfection.
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Latest review:
Extensions- 18 Sep 2019
To start off with the job went reasonably well - we were happy with the workers and the progress. but when we neared completion the work slowed up we waited 3 months for a response from Jordan. we had an issue where his plasterer hid the plumbing access in the wall. - This cost us £500 to sort and re-decorate so we came to an agreement that this was fine and at the time i presumed that Jordan was going to sort out the building control. so we then chased and chased but obviously since he had his money he wasn't interested he answered the phone and hung up. so we called building control and there are 2 small bits to fix which are all due to his work not being up to scratch. obviously i will be paying out for this - so please be careful when using him and dont pay him until you have all of the documents as he will not resolve any issues after being paid. i have had 2 previous building projects and this was by far the worst experience going. avoid dont use him thanks
Coste + Beno
Rating: 5 out of 5
Extension Builder in Dulwich
Coste + Beno is an experienced construction business with a strong residential background. We pride ourselves on balancing architectural ingenuity with fine craftsmanship, to offer specialist services to discerning clients in the premium residential sphere. Our bespoke approach has seen us creating bijoux bathrooms in Shoreditch to managing full-scale renovations on listed residences in Primrose Hill. We are looking forward working with you. Best, Coste + Beno
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Latest review:
Architecture- 27 Nov 2017
I contacted Marius because he had good reviews and wanted someone reliable and capable so design a single story extension with large external and internal bifold doors. I wasn’t disappointed - Marius has been excellent throughout the whole design process and produced drawings to a high standard which met our requirements. Marius was an excellent communicator and always available to give advice when required. Further more, he went out of his way to contact local authorities regarding any questions I had at no extra cost to clarify any uncertainties. I would highly recommend his architectural services - he was good value and very professional.
BHL Brickwork
No reviews yet
Extension Builder in Dulwich
BRICKLAYER Fully qualified nvq city & guilds since 2008 All work carried out to NHBC / LABC regs Neat and efficient References available Please call for any enquiries
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Andrii
Rating: 4.9 out of 5
Extension Builder in Dulwich
Local builder and bricklayer based in Maidstone. Specialising in garden walls, brickwork, foundations and house extensions. All work completed in accordance with Building Regulations and NHBC standards. Fully insured. Clean, reliable service. Free quotes.
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Latest review:
Bricklaying- 15 May 2026
Very good job on time and happy to follow instructions
CT KENT BUILDING GROUP LTD
Rating: 5 out of 5
Extension Builder in Dulwich
We are a distinguished building company with over 18 years of experience, delivering exceptional construction and structural solutions for high-value residential and select commercial properties. Our specialism lies in complex structural works and major building transformations, including load-bearing alterations, reinforced floors, ceilings and roofs, bespoke extensions, and loft conversions. We work in close collaboration with structural engineers, architects, and designers to ensure every element is executed with absolute precision, integrity, and compliance. Complementing our structural expertise, we offer meticulously delivered internal renovations, including luxury bathrooms and kitchens, bespoke tiling and flooring, and fully integrated electrical, plumbing, and heating systems. This integrated approach allows us to manage projects seamlessly from initial structural works through to refined, high-end finishes. We are highly experienced in working with listed and heritage buildings, combining traditional craftsmanship with modern construction methods while respecting architectural heritage and conservation requirements. Our work is defined by uncompromising standards, attention to detail, and a discreet, professional service. We pride ourselves on delivering exceptional results through clear communication, careful planning, and a commitment to excellence at every stage of the build.
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Latest review:
Always and everything is on time with his work..we have used his knowledge and expertise to help us design and build few more things around the house..many new ideas have come from his experience..must point out that the bathroom and shower room are his main jobs..
Saharan Enterprises
New on MyBuilder
Extension Builder in Dulwich
we create beautifully crafted interiors that combine luxury, elegance, and exceptional craftsmanship. Specialising in bespoke kitchens, fitted wardrobes, and premium carpentry services, we transform ordinary spaces into timeless works of art. Every project is carefully designed to reflect your style, maximise functionality, and add lasting value to your home. From sophisticated modern kitchens to handcrafted wardrobes and custom woodwork, our skilled craftsmen deliver flawless finishes with meticulous attention Our Services * Luxury bespoke kitchens * Custom fitted wardrobes * Premium carpentry and woodwork * Elegant storage solutions * Professional design and installation * Tailor-made finishes to suit your lifestyle
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Harpreet
No reviews yet
Extension Builder in Dulwich
I am fit your bathroom properly
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Kingsmarque construction and maintenance
Rating: 5 out of 5
Extension Builder in Dulwich
All building work taken on, slating and tiling, house renovations and extensions. We have a team of tilers, renderers, plumbers, painters and myself and business partner who run each job and manage the multiple trades required.
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Latest review:
Extensions- 25 Aug 2020
Really professional and quick to provide quotes. Unfortunately, due to COVID and our circumstances changing, we have had to cancel the job. We would definitely go back to them in the future though.
Love Build Solutions Ltd
Rating: 5 out of 5
Extension Builder in Dulwich
In-house Electricans, undertaking full scope of projects. House extensions, loft conversions Carpentry Groundwork Electrical installation, alterations, repairs
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Latest review:
Conversions - General- 11 Jul 2019
Excellent work. Finishing is neat. Good communication through out the process. I knew what had been accomplished and what was to be done and when. Very respectful. Lovely team. Thank you guys 👏👏👌👌😀😀
Sonic Building Supplies Ltd
No reviews yet
Extension Builder in Dulwich
At Sonic, we provide expert construction, plumbing, electrical and heating services for residential and commercial clients. With years of hands-on experience and a commitment to quality workmanship, our licensed technicians deliver reliable solutions—from routine maintenance and emergency repairs to full system installations. Whether you're dealing with a leaky pipe, faulty wiring, or a broken boiler, we’re here to help 24/7. Serving London, Surrey, Sussex, Hampshire, Berkshire, and surrounding areas, we pride ourselves on prompt service, transparent pricing, and customer satisfaction.
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CPC Home Improvements Ltd
Rating: 5 out of 5
Extension Builder in Dulwich
We are a family run business and work very closely with the local authorities. We are affiliated with local regulators so you can see testimonials from previous jobs and rest assured on the services you will receive. We specialise in building, construction and home improvements
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Latest review:
Chris hung a number of prefabricated doors and door frames that needed adjusting. He promptly provided us with a detailed quote and his availability. He did a job on a Saturday which was great as we really need this job to be done as soon as possible. The job was completed quickly, the adjustment to the doors are practically not noticeable and the doors and frames look great. Chris and his helper were very helpful and did a great job for us. Will definitely us Chris's services again.
southcoast building services ltd
Rating: 5 out of 5
Extension Builder in Dulwich
I would like to introduce our company, Southcoast Building Services LTD, which has been successfully operating for the past 10 years. We are an established and trusted building company with an excellent track record of delivering high-quality work and maintaining strong customer satisfaction. We specialise in design and build projects for both commercial and domestic clients. Our services cover a wide range of construction works, from garden renovations, extensions, and loft conversions to full property refurbishments and new builds. We also undertake larger projects including care homes, supported living properties, and buildings adapted for special needs, where quality, safety, and compliance are essential. Our team is committed to providing reliable service, high standards of workmanship, and competitive pricing. We never compromise on quality and always aim to meet our clients’ requirements, deadlines, and budgets while maintaining clear communication throughout the project. We take pride in helping our customers complete projects of all sizes — from small improvements to complex developments — and we are always ready to assist with planning, design, and construction from start to finish. Sincerely, Erik Stankevics Southcoast Building Services LTD
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Latest review:
Hard Flooring- 5 Dec 2024
Erik kept me informed when he was running late due to traffic issues. He arrived and did a spendid job. Even hoovered the stair carpet when he was finished. We no longer have creaking stairs. Would recommend!
White and osullivan construction Ltd
No reviews yet
Extension Builder in Dulwich
Hi My business is white and Osullivan construction. I’m the director. Started in the building trade after collage and soon had my own company set up. Every year getting stronger. Me and the team specialise in new builds, extensions, loft conversions and commercial maintenance. I have a team of qualified workers 3 full time and other trades who iv used and built a relationship up over past 5years.
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Skylon Construction Limited
No reviews yet
Extension Builder in Dulwich
Skylon Construction Ltd. successfully delivers projects in mixture of construction, renovation and refurbishment services to individual clients, as well as to other companies. We pride ourselves on an ability to deliver on-schedule without ever compromising our outstanding level of quality. We aim for completing on schedule and believe in zero snaggings and zero incidents policy.
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3.9

Top rated Extension Builders

Our Extension Builders in Dulwich, 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 Dulwich?

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 Dulwich 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 Dulwich who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Dulwich?

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

Find extension builders in Dulwich with MyBuilder

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

Step 2: Compare different extension builders in Dulwich

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

Step 3: Hire Dulwich extension builders with confidence

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

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

What to ask a Dulwich extension builder before hiring?

Before hiring an extension builder in Dulwich or extension building company in Dulwich, 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 Dulwich?

An extension builder in Dulwich 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 Dulwich 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 Dulwich?

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 Dulwich 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 Dulwich 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 Dulwich

Can an extension builder in Dulwich help with planning permission?

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

Many Dulwich 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 Dulwich help with materials and finishes?

Yes, most extension builders in Dulwich 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.