Extension builders in Rainham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (16 reviews)

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

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 Rainham

2587 Results

Sort by:

LAS construction
No reviews yet
Extension Builder in Rainham
A trusted construction company for building renovations, repairs and maintenance.
Get in touch
Co.35 Limited
New on MyBuilder
Extension Builder in Rainham
CO.35 | Design-led Renovation & Refurbishment CO.35 is a London-based design and refurbishment company helping homeowners improve, renovate and transform their properties. Combining professional backgrounds in interior architecture, civil engineering and construction project management, with experience dating back to 2019, we offer a practical, design-led approach to residential refurbishment. Our services range from individual room improvements and kitchen and bathroom renovations to comprehensive property refurbishments, covering everything from initial planning and design development to construction, specialist trades and finishing works. Based in North London, we undertake projects across Greater London, bringing design understanding and technical expertise together throughout the process. We believe a successful renovation should be thoughtfully designed, carefully executed and clearly communicated. Whether you're updating a single room or refurbishing an entire property, our aim is to deliver a result that works beautifully and practically for your home. Design • Deliver • Maintain
Get in touch
Valens Construction Ltd
Rating: 4.7 out of 5
Extension Builder in Rainham
We work in construction industry for many years and doing all type of building work which include Side & Rear Extension, Kitchen Refurbishment, Loft Conversion, Convert into HMO, plumbing & electrical, carpentry etc
Get in touch
Latest review:
Kitchen Fitting- 1 Feb 2026
Valens Construction done a good job fixing the kitchen. Made sure every step was done with extra care
Empe building services ltd
Rating: 5 out of 5
Extension Builder in Rainham
BASED IN WEST LONDON EMPE BUILDING SERVICES ltd. ARE A COMPANY OFFERING A RANGE OF BUILDING SERVICES. WE TAKE GREAT PRIDE IN OUR WORK AND PLACE A STRONG FOCUS ON WORKING VERY CLOSELY WITCH OUR CUSTOMERS THROUGHOUT ALL THE STAGES OF THE PROJECT, AS TO ENSURE EVERY DECISION IS DISCUSSED AND QUERYS ARE ADRESSED. OUR REPUTATION IS THE FUNDATION OF OUR SUCCESS. WE TAKE PRIDE IN OUR APPROCHABLE, PROFESIONAL, EFFICIENT AND TRANSPARENT SERVICE. PLEASE VIEW OUR GALLERY FOR EXAMPLES OF OUR WORK.
Get in touch
Latest review:
Extensions- 31 Jan 2020
We had a porch built by Emil & Peter's team & lead water pipe changed, our house has gone from the tattiest on the street to the smartest now :) The guys turned up on time when they said & worked hard all day, their workmanship is excellent & my neighbour has also used them to do quite a few jobs now& are really pleased with their work. I will definitely be using them again & would highly recommend them!
Gent Electrical
Rating: 5 out of 5
Extension Builder in Rainham
Undertake all works from changing a light switch to the design and installation of domestic rewiring.No job too small. Building control notification as well
Get in touch
Latest review:
Electrical- 25 Jan 2023
Gentjan was a thorough professional and a true gentleman. Quoted competitive price, came exactly on time and did job to very high precision. There were some unexpected issues (due to my bespoke kitchen setup, but he improvised amazingly - thinking out of the box. I cannot recommend him enough. Will definitely use him again.
AP1 construction ltd
No reviews yet
Extension Builder in Rainham
Hi how are you every one I m self employed working as a contractor in Croydon I start my work 2009 since I make a lot of bathroom and house currently I make 10 flat in Croydon high street that’s new work hope you guys give me chance to prove my self I m happy to show my job have my boys who doing all work plasters painter and brekwork and bathroom
Get in touch
Josh
No reviews yet
Extension Builder in Rainham
Hi we're honest reliable builder's and take on all aspects of building groundworks and landscaping
Get in touch
B D construction
Rating: 5 out of 5
Extension Builder in Rainham
Have been a builder for forty years family run business with my son’s working with me.
Get in touch
Latest review:
Brad and his company have done various jobs in my house including painting and decorating - refurbing my bathroom (which is amazing) and putting a new roof on my shed. He also does a lot of conversion and refurbing work for the Property Investment company that I work for and all to a very high standard. He is professional and hardworking and wouldnt hesitate to use his company for future work as well
STM Contractors
No reviews yet
Extension Builder in Rainham
STM Contractors is a leading construction and project management firm dedicated to delivering high-quality services to clients across various industries. With a team of skilled professionals and a proven track record, we specialize in providing comprehensive solutions for residential, commercial, and industrial projects.
Get in touch
BrownBricks Construction
No reviews yet
Extension Builder in Rainham
"Welcome to Brown Bricks Constructions, your local builders with a witty touch! From painting and decorating to handyman work and everything needed within the house, we've got you covered. With our skilled craftsmen and friendly approach, we turn your house into a home. No task is too big or small for us – whether it's fixing a leaky faucet or transforming your space with a fresh coat of paint, we handle it all with precision and flair. Trust Brown Bricks Constructions for quality workmanship, attention to detail, and a touch of local charm. Let's build something wonderful together!"
Get in touch
Building services 4U LTD
No reviews yet
Extension Builder in Rainham
professional builders. on the market for over 20 yrs. we work any where in London and around it. we do any type of building work including bathrooms kitchens extensions etc. we as a builders are very flexible with the costumer. costumer always comes in the first place and try our best to keep him happy. we also work with other big branches like Wickes and B&Q. on electrical side we have a team of electrician that works on site every day so we are looking to extend ourselves a little. very capable team of builders and electricians.
Get in touch
Classic Building Solutions
Rating: 4.8 out of 5
Extension Builder in Rainham
Based in Southend-on-sea, Classic Building Solutions offers competitive rates, excellent response times and all the professional advice you need. We’ve successfully completed projects for thousands of customers. Our team is committed to quality and outstanding customer service. We have 93 years of collective experience and a 100% customer retention rate.
Get in touch
Latest review:
Bathroom Fitting- 18 Jul 2019
Chris and his team have transformed our dingy bathroom into a lovely bright and clean space, replacing our boiler at the same time. He advised on what was possible to maximise space in our small bathroom and managed the whole process taking the hassle out of it for us. No issue was too big or small and Chris went beyond the call of duty to ensure we were happy. Letting strangers into your house can be worrying but I can’t speak highly enough of how respectful Chris an his team were. We’re so pleased with the final result, we’ve already lined Chris up for another job we need doing. Wouldn’t hesitate in recommending Flo.
DEC Renovations
Rating: 3 out of 5
Extension Builder in Rainham
Carpenter with 20 years plus experience. Small extensions, shop fitting, all first fix and second fix carpentry. Bespoke kitchens and furniture. Design and install bathrooms. Complete house refurbishment. Garden buildings patio and decking.
Get in touch
Latest review:
Extensions- 21 Dec 2017
Dishonest from the start. Every excuse in the builders handbook (and new ones). Lazy (they like to work 10-1 and never a full week). Never finished the 2 month project after 6 months - walked away
Acorn Building Contractors Ltd.
No reviews yet
Extension Builder in Rainham
Highly Skilled, Experienced and Qualified Building Contractor with 20 Years Experience We are able to undertake all Groundworks including Drainage, Reinforced Concrete Foundations and Structures, Brick and Block work and Structural Carpentry We only engage suitably skilled and vetted trades who we know and trust on our projects. We are a Building Contracting company who focus on delivering a quality end product on time and on budget. We provide detailed quotations for all works Qualifications include: Black CSCS Managers Card, NVQ6 General Contracting Operations, NVQ3 Engineering, Site Managers Safety Training Scheme, References available on request
Get in touch
Buildswell ltd
Rating: 5 out of 5
Extension Builder in Rainham
my name is sehaj the main contractor of buildswell ltd.We are a full facilities management and installation company,If you are thinking of renovating your home,building an extension, or changing your roof. Sehaj from buildswell has a local and trusted construction business to provide maintenance and building services of the highest standard at competitive prices. Very friendly and professional
Get in touch
Latest review:
Extensions- 20 Jan 2021
Trusted person good quality extension with no delays
MA DESIGN ENGINEERS
No reviews yet
Extension Builder in Rainham
With over 10 years of experience in structural engineering, MA Design Engineers specialises in providing tailored solutions for residential and commercial projects. Our expertise includes new build designs, residential refurbishments, and structural alterations. We are committed to delivering practical, efficient, and visually appealing structural designs that meet your project's unique needs. We offer a comprehensive range of services, including structural design calculations, general arrangement drawings, and detailed reports for pricing and building regulations approval. We also provide structural surveys and assessments for wall removals, alterations, and building defects, such as subsidence and cracking. At MA Design Engineers, we work closely with architects, contractors, and clients to ensure seamless integration of our designs into your project. We can assist throughout all phases of construction, from initial concepts to on-site inspections and construction support. Our goal is to provide reliable, cost-effective, and elegant structural solutions that bring your vision to life. Contact us to discuss your project today!
Get in touch

4.3

Top rated Extension Builders

Our Extension Builders in Rainham, are rated 4.3 out of 5 based on 16 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 Rainham?

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

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

What are the hourly rates of extension builders in Rainham?

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

Find extension builders in Rainham with MyBuilder

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

Step 2: Compare different extension builders in Rainham

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

Step 3: Hire Rainham extension builders with confidence

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

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

What to ask a Rainham extension builder before hiring?

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

An extension builder in Rainham 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 Rainham 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 Rainham?

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 Rainham 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 Rainham 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 Rainham

Can an extension builder in Rainham help with planning permission?

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

Many Rainham 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 Rainham help with materials and finishes?

Yes, most extension builders in Rainham 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.