Extension Builders in East Dulwich

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (20 reviews)

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Some of our top rated extension builders in East Dulwich

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GRAND DESIGNS INTERNATIONAL LTD
Rating: 5 out of 5
Extension Builder in East Dulwich
Grand Designs International (GD) | Architectural, Engineering & Construction Services At Grand Designs International (GD), we are dedicated to delivering high-quality architectural, engineering, and construction services tailored to meet our clients’ unique needs. Backed by over 20 years of expertise, our team specializes in transforming visions into reality—whether you're planning a new build, home extension, loft conversion, or full-scale renovation. With a strong foundation in innovation, sustainability, and precision, we provide end-to-end project solutions, from initial design and planning permissions to structural calculations and final construction. Our commitment to quality, efficiency, and client satisfaction ensures that every project is completed to the highest standards. Why Choose Grand Designs International? ✅ Full-Service Expertise – From architectural planning to construction, we handle every stage seamlessly. ✅ Planning & Building Regulations Specialists – We navigate approvals efficiently to prevent delays. ✅ Experienced & Certified Team – Qualified engineers, architects, and builders with a proven track record. ✅ Tailored Solutions – Every project is custom-designed to meet your style, space, and budget needs. ✅ Transparent Pricing & Project Management – No hidden costs, just reliable service with regular updates. ✅ Fast Turnaround & On-Time Delivery – We work efficiently without compromising quality. Our Services 🏡 Architectural & Planning Services Planning Applications & Building Regulations Approval Concept & Detailed Design Interior Design & Space Planning 3D Visualizations & Rendering Enforcement & Retrospective Planning 🏗️ Structural & Engineering Design Structural Calculations & Drawings Civil & Structural Engineering Services Quantity Estimation & Cost Planning 🔨 Construction & Building Services Home Extensions & Rear Extensions Dormer Loft Conversions & Flat Conversions New Build Homes & Full Renovations Project Management & Site Supervision Construction Planning, Procurement & Logistics Quality Control & Safety Management At Grand Designs International, we believe in delivering excellence, one project at a time. Our reputation for integrity, professionalism, and top-tier craftsmanship makes us the preferred choice for homeowners and businesses across London and beyond. 📞 Get in Touch Today! Let’s discuss your project and bring your dream home to life.
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Latest review:
★★★★★ Highly Recommended! I had an existing 3-bedroom rundown property and contacted multiple builders before meeting Director Mr. Q Nawaz. From our first meeting, I was impressed by his ideas and the fact that Grand Designs could provide all services in-house. Initially, I proceeded only with the planning application to see if what he promised was possible—and YES, he delivered! My application was approved as he assured me. Seeing this success, I entrusted them with the entire construction project, and Grand Designs completed it within just 6 months, despite the challenges of COVID-19. Not only did they build my project, but they also added significant value to the development. I’m proud to have worked with them, and their exceptional work on my St Albans development is now featured in their portfolio. Within one year, the value of my property increased by £500,000—a testament to their expertise! Extremely professional, highly skilled, and very reasonably priced. You don’t need to go anywhere else—Grand Designs is the complete package!
Sanger Builders Ltd
Rating: 5 out of 5
Extension Builder in East Dulwich
Sanger Builders Ltd are a versatile and dynamic building company that offer a wide range of building services which include:Loft conversions,Extensions,Basements etc.We have an extensive range of time served tradesmen who not only take pride in there work but also the company itself.
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Latest review:
Extensions- 16 Aug 2019
Sean and his team were polite, easy to communicate with, hardworking and professional. They completed the build on time and budget. I would use them again.
Muhammad virk
Rating: 5 out of 5
Extension Builder in East Dulwich
We undertake all kind of work. And our priority is to provide quality work
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Latest review:
Restoration & Refurbishment- 1 Mar 2023
Mohammed was very helpful and understanding I was very impressed about his work
CM Building LTD
Rating: 5 out of 5
Extension Builder in East Dulwich
At CM Loft Conversions, we specialise in luxury loft conversions, home extensions, and full refurbishments for both residential and commercial properties across London. Our dedicated team is renowned for transforming spaces with unparalleled craftsmanship and meticulous attention to detail. Whether it’s a high-end home, a modern office, or a commercial property, we deliver projects that elevate both form and function. By seamlessly blending design innovation with practical solutions, we ensure every project not only enhances the aesthetic appeal of a space but also maximises its value and usability. At CM Loft Conversions, we are passionate about creating bespoke spaces that reflect the unique needs of our clients. From concept to completion, we focus on the fine details and provide a smooth, stress-free experience. Whether you’re looking to transform your home, expand your business premises, or refurbish a commercial unit, our team is committed to delivering results that exceed expectations.
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Latest review:
I met Charlie and his team from CM Builders Ltd when they were completing a loft extension and ground floor extension for one of my neighbours. Quotation and budget I was given an estimate subject to drawings as I was on a strict budget that I had to keep to for the build. Charlie was able to help me keep to the budget, both at the final agreed plan and during the build. The project was complex in that whilst it was a loft extension, all of the house was rebuilt. The only thing kept was the external walls and first floor rafters. Whilst the footprint of the first floor was not being changed I wanted to bring it up to current building standards with extra insulation. All of the plumbing and electrics were also replaced including a new boiler. The overall build has come in on budget, save for agreed enhancements that I did not think of at the planning stage and or building regulations such as double ceiling fire plaster boards. There were also items such as the original stairs that I wanted to keep, but Charlie was able to increase the height space in the kitchen making the worktop much more usable for tall people for a larger part of the kitchen. These were suggested to me as potential options as part of the build. Stage payments The stage payments have all been sensible throughout the build and linked to the ongoing work schedule. I have not therefore had any concerns in this regard. Quality of work This was a very complicated build as unlike the ground floor the first and new second floor are “L” shaped. The new 2nd floor included an en-suite and 2 bedrooms. Overall the house has been increased from 2 bedrooms 1 bathroom, to four doubles and 2 bathrooms. The quality of work is excellent and Charlie project manages his team to ensure that they all deliver to a high standard- if it is not done correctlt they do it again, with Charlie spotting any issues. Timeline of build This has generally gone to plan very well. As with any build you have to be realistic as things will happen outside of anyone’s control. When issues have arisen Charlie manages them to a conclusion. Also be realistic if you are having to manage to a tight budget. I had to plan for various stage receipts of cash before I could order the kitchen and bathroom items - make sure you understand how this impacts the build and availability of the work force, recognising that CM Builders have to book kitchen fitters and plumbers. CM Builders are also very helpful in that they have sorted out issues with the brick work of my freestanding garage (nothing to do with the build) and also a neighbour’s wall that could have been dangerous to the public, should it have failed. Conclusion The whole family are very pleased with the outcome and we now have the equivalent of a brand new house that has been built to a very high standard. This has definitely been worth doing both from a valuation perspective and quality of life perspective. I would not hesitate to instruct Charlie and his team again.
DR PROGRESSIVE BUILDING LTD
Rating: 5 out of 5
Extension Builder in East Dulwich
We are reliable and friendly company for domestic and commercial projects. We can undertake all aspects of building including new builds, extensions and loft conversions, house refurbish, fitting kitchens and bathrooms and a whole range of larger home improvements. Our aim is to deliver a high quality of service that meets your needs and your budget.
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Latest review:
Kitchen Fitting- 27 Feb 2026
Worked really hard and did a great job. Would recommend Darek for any refurb job.
LLC projects limited
Rating: 5 out of 5
Extension Builder in East Dulwich
At LLC PROJECTS LTD, we deliver high-quality building and renovation services across London, Surrey, and Hampshire. With over 16 years of experience in the construction industry, our team specialises in all aspects of building works, maintenance, and plumbing — from full refurbishments and extensions to kitchen and bathroom installations. We pride ourselves on excellent workmanship, attention to detail, and reliable project management from start to finish. Most of our work is carried out in-house to ensure consistent quality and high standards. Whether it’s a small repair or a large-scale project, we approach every job with professionalism, transparency, and care. Contact us today to discuss your next project and see how we can bring your vision to life
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Latest review:
I recently hired LLC Projects Limited to refurbish my ground floor and add a new bathroom, and I couldn’t be happier with the results. From start to finish, the team was professional, reliable, and truly cared about delivering quality work. The new bathroom looks amazing, and the ground floor transformation exceeded my expectations. Communication was great throughout, and they kept everything on track and tidy. The crew was friendly, and they handled any concerns I had quickly. I’d definitely recommend LLC Projects Limited for any home improvement work—they’ve earned my trust, and I’ll be calling them again for future projects
Force Design London Ltd
Rating: 5 out of 5
Extension Builder in East Dulwich
Force Design London – Expert Construction and Renovation Services With 15 years of experience in the construction industry, we have successfully completed numerous projects, including Loft Extensions and Side Extensions. Together with our highly skilled team, we not only specialize in structural extensions but also provide a wide range of renovation, decoration, flooring, kitchen and bathroom remodeling, and general construction services. We adhere to high-quality standards in all our projects and ensure that all necessary certifications are provided, guaranteeing safe and legally compliant work. Our projects seamlessly blend aesthetics and functionality, creating unique and tailor-made designs for our clients. By carefully analyzing our clients’ needs, we offer budget-friendly and timely solutions. Our commitment to using high-quality materials, meticulous attention to detail, and customer satisfaction has established us as a trusted name in the industry. We can provide a portfolio showcasing some of our completed projects. Get in touch with us
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Latest review:
Carpentry- 17 Feb 2025
Ahmet did an excellent job. Very responsive and came out first to check the job. Will definitely be calling Ahmet back for other jobs.
My Home Services London Ltd
Rating: 5 out of 5
Extension Builder in East Dulwich
My Home Services London Ltd is a professional construction and home improvement company specialising in bathroom and kitchen renovations, house extensions, loft conversions, and full property refurbishments. We also provide expert gas, electrical, electronics, and smart home (domotics) installation and maintenance services. Our team delivers complete, high-quality solutions designed to transform homes by combining functionality, comfort, style, and modern technology. From small upgrades to large-scale renovation and extension projects, we work with a safe, reliable, and professional approach tailored to each client’s needs and vision.
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Latest review:
Handyman- 29 May 2026
Absolutely fantastic service, they did a great job!!! Friendly and professional. I look forward to having them back for more jobs. 100% highly recommend!! Thank you very much!
Heg Construction ltd
Rating: 5 out of 5
Extension Builder in East Dulwich
Hello I am Edmond, the proud owner of HEG Construction Ltd, A little about us With many happy and returning customers over the last 15 years, you can be sure of being well looked after. Our aim is to provide a stress free project, delivered in a manner that I am confident will exceed your expectations. I work with a small team of trusted colleagues, who communicate and work together well. Our customers are accustomed the outstanding quality of projects we complete, by sourcing quality materials with experienced installers we create truly bespoke masterpieces lasting our customers many years. Up to 5 year guarantees are included as standard on all completed work. Thank you for taking the time to consider our company’s profile, I look forward to hearing from you. HEG Construction Ltd
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Latest review:
Edmond did stellar work on the full kitchen renovation of our central London flat, and I can't recommend him highly enough. His professionalism, expertise, and attention to detail are on another level, and he is an excellent communicator. The end result was meticulous; he worked efficiently within the agreed timelines while resolving unexpected challenges and providing solid guidance throughout the project. Edmond also has a strong network of professionals who were just as reliable and easy to work with as he is. We also appreciated how tidy our home was left every day and how well all areas were protected during the build.
Dragos Jugaru
Rating: 5 out of 5
Extension Builder in East Dulwich
JD SMART BUILDING SERVICES is a company with 7 years of experience assisting in residential and commercial building projects. Skilled in site preparation, material handling, and operating basic construction tools. Knowledgeable in safety procedures and committed to maintaining a productive and hazard-free work environment.
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Latest review:
Windows & Doors (Wooden)- 17 Jan 2026
Great work. Very professional and very fast. Highly recomended.
SEASOUTH BUILDS LIMITED
Rating: 5 out of 5
Extension Builder in East Dulwich
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.
FLYNN properties
Rating: 5 out of 5
Extension Builder in East Dulwich
With over 10 years experience and always producing high quality finishes. From kitchens, bathroom to extensions and always with a good positive happy attitude. let us work with you to design and achieve exactly what you’re looking for.
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Latest review:
Tiling- 7 Aug 2023
Paul was great. Easy regular comms. Arrived early on the day and fit me in as best he could. Straight to it, great work, very professional and sorted out some other problems as they were discovered. Talked me through options and did what was asked to a very high finish. Would highly recommend and use again.
Nick the Brick
Rating: 5 out of 5
Extension Builder in East Dulwich
Hello everybody, my name is Nico and I’m a bricklayer with Diploma and NVQ in bricklaying, I been working as a bricklayer for the last 10 years and after been working for all the main high standard bricklayer company I have decide to start my own company. In those years I always been appreciate for my professionalism and the quality of my work, including my obsession with details,I’m confident to say that I can take any expects of brick/block work. please feel free to contact me anytime.
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Latest review:
Demolition- 26 Aug 2025
Nico did an amazing job on emptying, demolishing and clearing the shed. It was much harder than anticipated but Nico and his team went above and beyond to do the job, leaving everything clean and tidy. Thank you for your hard work. Nico was always polite, courteous and super prompt. I will be using Nico’s services again and can highly recommend him to others.
ResidentDevelopments
Rating: 5 out of 5
Extension Builder in East Dulwich
Conceiving and delivering aspirational residences, for the Resident.
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Latest review:
We have previously been burnt working with self proclaimed tradesmen. The organisation is professional and customer focussed. Working with them was a pleasure, I couldn’t recommend them enough.
TRIADA BUILDING LTD
Rating: 5 out of 5
Extension Builder in East Dulwich
Triada Building LTD is a family-run construction company with over 15 years of experience specialising in house extensions, loft conversions, renovations, and new builds. We are committed to delivering high-quality workmanship, completed on time and within budget. From the initial consultation through to project completion, we focus on clear communication, reliability, and attention to detail to ensure a smooth and stress-free experience for every client. Our skilled team of qualified tradespeople takes pride in providing a professional, friendly, and dependable service, with customer satisfaction at the centre of everything we do.
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Latest review:
Extensions- 23 Aug 2023
On schedule and to budget, Ibrahim and his team from Triada Building Ltd delivered a very high standard on this project. Despite poor weather (Summer of 2023) and some issues with 3rd party contractors, access for concrete pour, skip delivery etc. his team worked each stage of the project to plan keeping me informed and showing great level of craftsmanship. I was after a simple workshop build that would compliment our house and he did not try to over sell options I wasn't interested in. Very happy with the result, and would recommend. Thank you.
bb construction
Rating: 4.9 out of 5
Extension Builder in East Dulwich
Barnes Builds Construction we are a small family run business covering all aspects off building and refurbishments offering highest standards of work and communication taking great pride in our crafts .
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Latest review:
Groundwork & Foundations- 28 May 2026
10000000 % would recommend - totally professional - delighted with the patio he put down Lovley fella - Ben and Bob worth a mention too - proper grafters

Top rated Extension Builders

Our Extension Builders in East Dulwich, are rated 4 out of 5 based on 20 reviews from customers like you.

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What types of services are offered by local extension builders in East 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 East 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 East Dulwich who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in East Dulwich?

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

Find extension builders in East Dulwich with MyBuilder

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

Step 2: Compare different extension builders in East Dulwich

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

Step 3: Hire East Dulwich extension builders with confidence

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

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

What to ask a East Dulwich extension builder before hiring?

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

An extension builder in East 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 East 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 East 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 East 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 East 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 East Dulwich

Can an extension builder in East Dulwich help with planning permission?

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

Many East 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 East Dulwich help with materials and finishes?

Yes, most extension builders in East 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.