Extension Builders in Rainham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (19 reviews)

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Some of our top rated extension builders in Rainham

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HighLine Build & Design
Rating: 5 out of 5
Extension Builder in Rainham
At HighLine Build & Design, we deliver premium-quality construction and renovation services across London. From full property refurbishments to bespoke carpentry, electrical, plumbing, tiling and decorating, our multi-trade team handles every project with precision and care. We take pride in reliable service, honest pricing, and high-end finishes on every job — big or small.
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Latest review:
Carpentry- 7 Dec 2025
Came on time and done a fantastic job on my doors. Very tidy and cleaned up afterwards. Highly recommended!!!
Arde Construction
Rating: 5 out of 5
Extension Builder in Rainham
high quality for reasonable price!!!
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Latest review:
Windows & Doors (uPVC & Metal)- 2 Sep 2016
Edgaras is very nice, competent. He is punctual, good communication, did job with high standard. He had lot of experience, very knowledgeable, always give advice for the job, maintenance. I recommended.
PBC Interior Design and Build
Rating: 5 out of 5
Extension Builder in Rainham
Choosing the right contractor can be a minefield if your project needs specialist skills or a little extra care. As an established building company with 42 years trading experience we have gained an enviable reputation for personal service quality of workmanship and attention to detail.
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Latest review:
Extensions- 17 Nov 2016
Geoff and his men did a fantastic job. They were all very professional but also really friendly and helpful. They made sure we had, as little disturbance as possible whilst the job was going on which was great. Nothing was too much bother for them and I wouldn't hesitate recommending them to others.
RAW Services
Rating: 4.8 out of 5
Extension Builder in Rainham
Hi I can offer you the following services: Electrical works / Kitchen installations (design/install) / full extensions and conversions /plumbing works / Handyman services from fitting shelves to decorating a whole house. All installations are carried out to the highest standard!
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Latest review:
Windows & Doors (uPVC & Metal)- 9 May 2020
Turned up on time, completed the job very cleanly and tidy. Would recommend.
AGIM CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Rainham
We are a construction company based in Romford with over 20 years of experience in house renovations, redecorations, extensions, scaffolding, gardening & landscapes
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Latest review:
We are a property management company who have been working with Klodjan and his team for the past 5 years. They have fully managed the maintenance of all of our properties and have carried out regular handyman repairs, painting, removals and full refurbishments. We are pleased to say they are highly skilled and educated workers who have impressed us many times with their professionalism and reliability. We highly recommend them!
ALLSPEC GROUP LIMITED
Rating: 5 out of 5
Extension Builder in Rainham
New Builds, Extensions, Loft Conversions, Kitchens & Bathroom. All general building work undertaken.
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Latest review:
Double store extension. Work completed to a high standard would recommend. 5*
Shefit
Rating: 5 out of 5
Extension Builder in Rainham
we build all types of walls,houses,extension, porches, garden walls etc
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Latest review:
Bricklaying- 14 Apr 2026
Prior to starting the job, Shefit was very responsive to my emails and WhatsApp messages and was very easy to communicate with. I left Shefit detailed instructions of where to position the walls we wanted constructing for our small extension as I was not going to be there when he arrived. I returned later that afternoon to find the job well under way - he had even sent me a short video of the work in progress - yo find everything had been done as per my instructions. The team worked all day and finished the job in about 8 hours - hardly stopping for a break it seems and refusing any attempt by my wife to ply them with coffee and tea. They left the site clean and tidy were incredibly polite and respectful - one of them even asking if they could use the toilet, which of course they could! I would recommend Shefit and his team wholeheartedly. The price was reasonable and the job was done quickly and cleanly.
Deal Installations and Maintenance Ltd
Rating: 4.9 out of 5
Extension Builder in Rainham
We might deliver building services but we are actually into people business. Our company mission is to provide top quality building services to satisfy our customers needs. We are making ourselves available so everyone can take advantage of our top rated skills and customer satisfaction . You deserve the best and we are here to help. Safety first, then customer first. Experience will take care of the rest.
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Latest review:
Restoration & Refurbishment- 14 Jun 2020
Vasile Pavel and his team were brilliant so helpful efficient with great advice of what would look good for a best price. He did a house clearance for me a new bathroom and new kitchen as well S decorating and some electrical work. I highly recommend him.
JWK Building and Landscaping
Rating: 5 out of 5
Extension Builder in Rainham
Small building works. Block paved drives. Flagged patios. Feature Walls. Lawns. General Building. Small Family Business with over 45 years experience. Marshalls register approved TrusterATrader registered
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Latest review:
Bricklaying- 31 Aug 2020
Very satisfied customer here. Excellent work done. Punctual. Thank you William
Hussain Building Coorperation
Rating: 5 out of 5
Extension Builder in Rainham
# Hussain Building Corporation Hussain Building Corporation is a trusted and experienced building services company specialising in electrical work, plumbing, renovations, extensions, and emergency maintenance. With a large team of highly skilled and qualified tradesmen, we are committed to delivering reliable, professional, and high-quality workmanship on every project we undertake. Our company has built its reputation on providing exceptional service, attention to detail, and customer satisfaction. Whether it's a small repair, a full property renovation, a home extension, or an urgent maintenance issue, we approach every job with the same level of dedication and professionalism. We offer a comprehensive range of services, including electrical installations and repairs, plumbing solutions, property renovations, building extensions, and 24/7 emergency maintenance support. Our experienced team works across residential, commercial, and industrial properties, ensuring projects are completed safely, efficiently, and to the highest standards. At Hussain Building Corporation, we understand that every client has unique requirements. That's why we work closely with our customers from the initial consultation through to project completi
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Latest review:
Plumbing- 20 Jun 2026
My husband and I super impressed with the work done for us. I was a bit skeptical at first because I couldn't see a lot of reviews under this company but just felt to go with them. Things that impressed me: - Prompt response to my messages - Sent me a proposal with the cost so I wasn't guessing. - Was willing to order and pick up a tap for me on his way. - when I said that I needed the work done today, he was able to fit me in. - We agreed on when he should come, he communicated when he was 30 mins away and arrived just in time. - Friendly, honest and straightforward guy. He and my husband were talking like they had known each other before. - He was also able to do a quick kitchen sink work for us whilst here. - He was willing to answer our questions. - The tap he fitted in place of the old one is even better. Our old one splashes water all over when opened, even gently but this one isn't like that. The overall service has been incredible. Thank you so much. Will defo be in touch.
Sergio
Rating: 5 out of 5
Extension Builder in Rainham
Hi there !We are an experienced and reliable multi trader team covering the following aspects:glazing,SFS & extensions,flat roofs,any type of cladding,carpentry-all aspects, drylining,exterior /interior insulation installation & rendering,drainage systems & gutters ,plumbing & electrician ( registered and insure -domestic and industrial )and and general DIY jobs. We can help also with interior design and bespoke furniture fabrication of any type (domestic,commercial,offices,interlocking
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Latest review:
Insulation- 14 Feb 2023
I placed an add in mybuilder.com to have my house fully insulated and received many replies including one from Sergiu. After meeting him I felt he was the best placed person to carry out the work as he was the most knowledgeable and seemed to know all about the various types of insulation and which one I needed for my home. He fully explained the procedure from start to finish was always on time and tidied up at the end of each day.His work is second to none and the price was very very competitive in fact much less then the big companies were asking.I am extremely happy with the job and the standard of finish. Sergiu is very police professional and trustworthy and I would have no hesitation in recommending him to anyone on here to carry out work in your home.
Property3574
Rating: 5 out of 5
Extension Builder in Rainham
i have been in the building industry since 1980. Carpentry & Joinery is not my only trade. Electrical, Plumbing, Locksmithing,Security Alarms, & General Maintenance. All my work is to a very high standard with a very good eye for detail.
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Latest review:
Electrical- 13 Jun 2017
Aksel came and inspect our dishwasher socket that wasn't working. It was a fairly straightforward job and he came on a short notice which we appreciated.
paul king
Rating: 5 out of 5
Extension Builder in Rainham
With 20 years experience of quality through excellence has established our company as one of the leading providers of building services in the London area We specialise in home extensions, damp proofing , interior and exterior refurbishment for the modern and traditional home. we know our client focused culture, our commitment to quality services and our passionate approach to execution of works is a proven formula which gets the best results.
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Latest review:
My partner and I are so pleased with the extension work which Paul & team carried out, not just what was done but also the way it was done. All of the team were great - they turned up when they said they would, and simply got on with their work, They were all polite, friendly, helpful, conscientious, and made several suggestions to improve the finished work. They frequently checked on details with us as the work progressed to ensure that we was satisfied and our needs were met, we was extremely impressed with how they understood & handled our neighbours, will definitely use again in future projects!
Petre Marius
Rating: 5 out of 5
Extension Builder in Rainham
My name is Petre and together with my friends will form a team of four adept workers.My team is very reliable and respectful of client's property. We work hard to make sure that all the work carried out is to the highest standards
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Latest review:
Plastering- 4 Apr 2019
Petre and his colleague arrived promptly and worked very fast and efficiently. They fitted a new plasterboard ceiling and plastered the whole kitchen in one day. They were polite and tidy. Their work is to a very high standard and I will definitely be using them again.
gary cram
Rating: 4.6 out of 5
Extension Builder in Rainham
I have 30 years of experience in the building game i can do a variety of jobs and class myself as a multi tradesman im a qualified bricklayer , i can also turn my hand to carpentry, Landscaping is something i enjoy doing aswell.
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Latest review:
Garden Maintenance- 12 May 2025
Completed the job efficiently
JSCrudden building &construction
Rating: 5 out of 5
Extension Builder in Rainham
JSCrudden has been in the building trade since 1973 and has been trading since 1983 I undertake all types of building work extensions— conversion’s — kitchens—bathrooms etc I am city & guilds qualified
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Latest review:
Bathroom Fitting- 3 Jun 2024
Steve gave an excellent assessment of the job, was straightforward and helpful. Kept me updated regularly and used his experience to tackle the challenges of the job. Thanks Steve.

3.9

Top rated Extension Builders

Our Extension Builders in Rainham, are rated 3.9 out of 5 based on 19 reviews from customers like you.

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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.