Extension Builders in Millwall

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (21 reviews)

Easily find verified Millwall Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Millwall.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Millwall

3298 Results

Sort by:

TBH Construction Ltd
No reviews yet
Extension Builder in Millwall
Tbh construction ltd are specialist in brickwork and plastering but we cover all aspects of building extensions ,loft conversions etc . We have very competitive pricing and very capable tradespersons for all your building needs .
Get in touch
JBL DEVELOPERS LIMITED
No reviews yet
Extension Builder in Millwall
JBL Developers is a professional residential and commercial property‑development company, fully registered at Companies House. Visit our website to explore our portfolio and services. With a focus on quality, integrity and client satisfaction, we deliver bespoke renovations, refurbishments, conversions and new builds, tailored to your vision and budget. From the initial consultation through design, planning, build and hand‑over, our experienced team manages every phase with transparent communication and attention to detail. Whether it’s transforming a single room, overhauling a full home or developing a larger project, we ensure projects are completed on time, on budget and to the highest standards. At JBL Developers we believe in building lasting relationships and creating spaces that are not only aesthetically pleasing but functional, sustainable and built to last. Get in touch at to find out how we can bring your property ambitions to life.
Get in touch
Square Build Ltd
Rating: 5 out of 5
Extension Builder in Millwall
We're general building contractors, working on anything from everyday household projects which include general household repairs, painting and decorating, bathroom/kitchen renovations, property extensions and garden work projects. Although we are new to My Builder, we’ve had nearly 20 years experience completing many successful projects. We’re an established registered company which has been trading for several years.
Get in touch
Latest review:
Waste Clearance- 28 Jun 2019
Fine. Arrived promptly as requested.
Ps builder
No reviews yet
Extension Builder in Millwall
Hi guys, I do all kind of building works in reasonable price.
Get in touch
London Prime Construction and Builders LTD
No reviews yet
Extension Builder in Millwall
London Prime Construction and Builders is where we turn your dream home into a reality. With a reputation for excellence and a passion for exceptional craftsmanship, we specialise in residential construction, property extensions, and comprehensive renovations across London. Our mission is to enhance your living spaces with customised solutions that reflect your personal style and functional needs.
Get in touch
Jass
Rating: 5 out of 5
Extension Builder in Millwall
We do all kind of staircase with fill finishing, Roofs Structure, Roof Tiles , installing doors , Flooring and other construction work.
Get in touch
Latest review:
Carpentry- 1 Jul 2026
Jass was quick to respond and gave a good price for fabricating a staircase on site. Jass made sure I was happy before leaving and readjusted one of the steps which was creaking.
A1 solutions
No reviews yet
Extension Builder in Millwall
Affordable prices, professional results. General building work, pitch roofing, scaffolding,flat roofing. 36 years experience in the building trade
Get in touch
Garnet Construction Ltd
Rating: 4 out of 5
Extension Builder in Millwall
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.
Get in touch
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
Oak and stone construction
No reviews yet
Extension Builder in Millwall
We are a professional construction company specialising in building, refurbishing, painting, and decorating services. With a focus on quality, reliability, and attention to detail, we deliver projects for both residential and commercial clients, ensuring every job is completed to a high standard and on time. Quality building, refurbishing, painting, and decorating you can trust.
Get in touch
ks thind builders ltd
No reviews yet
Extension Builder in Millwall
it's our family business.we do new build, rear and side extension,loft conversion and renovations, we have 16 years of experience in this trade of business.
Get in touch
Saharan Enterprises
Rating: 5 out of 5
Extension Builder in Millwall
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
Get in touch
Latest review:
Kitchen Fitting- 21 Jun 2026
Quick and very efficient, replaced worktops, cupboard doors and drawers and fixed bathroom tap. Highly recommend
White and osullivan construction Ltd
No reviews yet
Extension Builder in Millwall
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.
Get in touch
Hsingh builders ltd
No reviews yet
Extension Builder in Millwall
I am professional builder with an experience of 17 years in the building industry and track record of successful projects . I am committed to deliver high standard of quality work which is completed on agreed time scale within the given budget. Starting from beginning till end, customers satisfaction is my priority , which is why I am able to turn visions into reality. You can really on us as our core values are- strong foundations, beautiful designs and lasting value. My vision as a builder is to build the dream house for my customers, so you can trust us in bringing architectural visions to life. You can rely us on as we do cater the needs of our customers, provide attention to every aspect and complete the work to high standards. We do discuss each step of the work with the customer and build a long lasting relationship with customers.
Get in touch
B.E Home Improvements
Rating: 5 out of 5
Extension Builder in Millwall
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.
Get in touch
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.
Surrey construction 1touch living
No reviews yet
Extension Builder in Millwall
Hi we have been trading for 40 years we are general builders undertaking new builds- extensions -loft conversions- refurbishments
Get in touch
SSS Construction services Ltd
No reviews yet
Extension Builder in Millwall
Hello If you are looking to get some work done by professionals working in construction industry with 14 years of experience, please get in touch . SSS construction services look forward to hearing from you soon .
Get in touch

Top rated Extension Builders

Our Extension Builders in Millwall, are rated 4 out of 5 based on 21 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 Millwall?

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

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

What are the hourly rates of extension builders in Millwall?

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

Find extension builders in Millwall with MyBuilder

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

Step 2: Compare different extension builders in Millwall

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

Step 3: Hire Millwall extension builders with confidence

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

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

What to ask a Millwall extension builder before hiring?

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

An extension builder in Millwall 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 Millwall 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 Millwall?

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 Millwall 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 Millwall 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 Millwall

Can an extension builder in Millwall help with planning permission?

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

Many Millwall 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 Millwall help with materials and finishes?

Yes, most extension builders in Millwall 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.