Extension builders in The City

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.6 (18 reviews)

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Some of our top rated extension builders in The City

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FM Building
Rating: 4.8 out of 5
Extension Builder in The City
Honest and friendly company, we here at FM Building focus on complete customer satisfaction and make a promise to our clients to offer best quality services at competitive rates. All projects considered and dealt with in a professional manner regardless of the size or duration.
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Latest review:
Handyman- 12 Oct 2018
The flat was left in a very bad state after the tenants left. Marius was able to undertake all the jobs, from changing carpets, redecorate, repairs and clean up. Also gave good advice as I was not able to attend the site in person so Marius kept me updated with photos. The price was also good. Thank you. Will use these guys again.
SDS CARPENTRY & BUILDING SERVICES LTD
Rating: 5 out of 5
Extension Builder in The City
SDS CARPENTRY & BUILDING SERVICES LTD is a team of qualified builders with over 15 years of experience and have all the skills necessary to take on board any building project at an extremely high standard. Yes, we’ll add real value, save you time and effort, keep disruption to a minimum and manage the project from design to final-fit. Our clients choose us because we have exceptional customer service and can deliver projects on time and within budget.
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Latest review:
Carpentry- 9 May 2020
I had a parquet floor laid and was very pleased with the result and attention to detail. Sergiu worked very hard and was a pleasure to deal with.
KUBEL LTD
Rating: 5 out of 5
Extension Builder in The City
Welcome to KUBEL LTD, your trusted partner for all your construction and renovation needs. We specialise in building and renovating extensions, roofs, and gardens to transform your home into your dream space. With our expertise and dedication to quality, you can trust that your project will be completed on time and to your satisfaction.
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Latest review:
Wonderful and honest. Excellent finish.
Buildstead Development Ltd
Rating: 5 out of 5
Extension Builder in The City
Our team at Buildstead has over 25 years of experience in the construction industry covering a wide range of project types. We truly are your "one-stop shop" when it comes to your project. From design to build, we pride ourselves on our integrity, the quality of our work and the working relationship we enjoy with our clients. With full project management included, you will be kept up to date at each step along the way ensuring complete peace of mind.
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Latest review:
Kitchen Fitting- 5 Nov 2020
An incredibly positive experience from start to finish. I found Robbie and team were hard workers, very likeable and provided brilliant results. Comms throughout were excellent. With Robbie happy to discuss the job over the phone beforehand and put our minds at ease. A big shout out to the team for undertaking this work during COVID. We understand the pressures this places on our tradespeople and we thank Robbie and his team for their diligence and commitment to wearing masks in our home and working safely. A brilliant experience.
Pawel
Rating: 5 out of 5
Extension Builder in The City
I am part of a dedicated two-man company with over 15 years of experience in the construction industry. We specialize in a wide range of construction projects, from extensions and loft conversions to garden transformations, as showcased in the photos below. When you choose me, you’re not just hiring a builder—you’re investing in exceptional craftsmanship, meticulous attention to detail, and a commitment to exceeding your expectations. I take great pride in my work, and my recent projects speak for themselves. I’d be delighted to share examples and even arrange visits to completed sites, where you can see the quality of my work firsthand and hear directly from satisfied clients. Your satisfaction is my priority, and I am committed to bringing your vision to life with professionalism and care. I look forward to discussing how I can help make your project a reality. Best regards,Paweł
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Latest review:
The job was to remove a stud wall with an archway between my kitchen and hall. Pawel was excellent from start to finish. He was good to communicate with before, and answered my questions fully. He turned up on time, was very neat and kept the noise down. He did a great job and cleaned up afterwards. I’d recommend!
E Building Services
Rating: 4.5 out of 5
Extension Builder in The City
Hi, I have over 12 years of experience in the construction and renovation industry, with specialist expertise in: * Drylining * Carpentry * Restaurant refurbishments * House refurbishments * Loft conversions * House extensions Over the years, I have built a trusted team of skilled and qualified tradespeople, allowing us to manage projects from start to finish — from planning and groundwork through to the final finishing touches. Our Services Include: * Plumbing (Gas Safe registered) * Electrical work (fully certified) * Roofing * Loft conversions * House extensions * Groundworks * Gardening and landscaping * Fencing * Waste removal No job is too big or too small. We take pride in delivering high-quality workmanship, reliable service, and excellent communication throughout every project. I’m always happy to offer advice, answer questions, and discuss your requirements with no obligation. Thank you for taking the time to visit my profile. I look forward to hearing from you and helping with your next project.
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Latest review:
Fencing- 28 Jul 2026
The garden door had been off its frame due to subsidence and vandalism. E Building refitted the door. Unfortunately, due to subsidence, the door can now not be unlocked.
Musawir Architecture Limited
Rating: 5 out of 5
Extension Builder in The City
We are fully qualified & established architectural design team, with high success rates in obtaining residential and commercial planning approval. A multi-disciplinary consultancy with 10 years combined experience. We provide services for all projects, new builds, extensions, conversion along with commercial projects and change of use. Musawir Architecture retains our competitive edge having exceptional approval rates for planning & building regulations submissions and offer outstanding quality.
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Latest review:
Extensions- 5 Feb 2021
Abul was very professional and went through our extension plans thoroughly, making sure he understood exactly what it was we were after and made some suggestions himself. He has been very easy to contact with any queries, a great service.
"Surudo" Building & Decorating
Rating: 5 out of 5
Extension Builder in The City
We are team of experienced builders provides professional execution of small, medium and larger projects, all types of refurbishment, maintenance and building services for private and business customers in London and surrounding areas. All of our work is carried to the highest standards.
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Latest review:
Bathroom Fitting- 3 Sep 2020
He is very professional and has done a good job on refurbishing my bathroom.
N EXTENSION KINGS LTD
Rating: 5 out of 5
Extension Builder in The City
I've been working in building trade for over 15 years , we can undertake any job small and big from foundations to the roof and anything between. We can provide any references,Me and my team take pride at what we do and we do it first time right .our work is second to none , and proof of that is that you don’t pay anything upfront till you are fully satisfied with the quality.
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Latest review:
Great job by Nick and the team, good attention to detail and very helpful, they went the extra mile to get a nice finish and make sure we were happy. We used after a neighbour also had a good experience.
Reliance utilities
Rating: 4.5 out of 5
Extension Builder in The City
Hello my name is Robbie, I am a qualified plumber and heating engineer, that’s also trained in electrics. I enjoy working out problems and helping customers come to the best resolution to their problems.
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Latest review:
Kitchen Fitting- 18 Aug 2026
Excellent job done by Robbie and his mate. Replaced the kitchen unit and did a couple of other jobs around the flat all in one afternoon. Great attention to detail and reasonable price. Would definitely use Reliance again. Thanks from Anne and Peter in Roehampton
Fussion Contracts
Rating: 5 out of 5
Extension Builder in The City
Hello, I’m a carpenter with 6 years experience who specialises in small odd jobs and refurbishments . Have a small crew and subcontractors availible on requests or if needed for the job. Fully insured and with trackable references.
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Latest review:
Carpentry- 7 May 2018
Good guys, committed to making sure the job is done right and to high standard. Many thanks
Em
Rating: 5 out of 5
Extension Builder in The City
Hey I’m Emrah professional builder for 6 years but my experience date way back. I do mostly refurbishments and maintenance. You can see some of my work below
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Latest review:
Conversions - General- 4 May 2025
I Hired Em to do my ground floor reno, which included a garage conversion and remodel of my kitchen where 2 internal walls were removed. Very glad I found Em to do the job. Him and his team was efficient, friendly, tidy and hard working. We encountered obstacles along the process (which is normal for any renovation) but Em gave his opinion, listened and we came to the best solutions. Very happy with the result. Em is a reliable, punctual, knowledgeable, fair, down to earth guy and one of the best if not the best contractor I have hired. Highly recommend. Some before and after pictures.
LeBirch projects ltd
Rating: 4.8 out of 5
Extension Builder in The City
New Build We specialise in property extensions, Loft conversions, Renovations & Complete new builds. carpentry, Interior design & garden landscaping. Decorating All our apartment and house decorating work is done with our four key policies firmly adhered to: Quality – Reliability – Friendliness – Tidiness. General Plumbing Our expert plumbers provide kitchen and general plumbing services. Specialists in bathroom designs and installations, shower rooms and sanitary upgrades.
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Latest review:
Ilias and his team were really great. They took out an old kitchen and installed the new one, plus installed a new toilet and sink, and did extra electrical work. They were very friendly, quick and efficient, tidy - I couldn't have asked for better!
KML BUILDING (UK) ltd
Rating: 4.5 out of 5
Extension Builder in The City
KML is a Central London-based building company with a strong reputation for quality, reliability, and attention to detail. We specialise in home extensions, refurbishments, HMO conversions, and general building works — providing tailored solutions for both residential and commercial clients. As a small, hands-on team, we offer a personal service from start to finish, ensuring every project meets the highest standards of craftsmanship and compliance.
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Latest review:
Bathroom Fitting- 13 Oct 2025
Camilo was supposed to meet me today to give me a quote. He missed our appointment without any notification. I am not here to chase people to do their job. The job will be advertised again, as he was not hired.
Dagat Ltd
Rating: 5 out of 5
Extension Builder in The City
DAGAT LTD is an established family-owned property development and refurbishment company who have been successfully trading in the South East of England. Whether we are constructing a new bespoke property, beautifully re-developing a home, or carrying out extensions of all shapes and sizes, each project always receives the same thoughtful and meticulous attention to detail. We are additionally able to provide an extensive range of commercially orientated projects having worked for a wide range of industry sectors. We strive to create a mutually beneficial close working relationship with our clients and / or their management team. We can either complete a project from the initial planning stage or work from an architect’s plans. Our pride in working all the way through to a beautiful finish has been a major contributory factor in our success.
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Latest review:
Conversions - General- 3 Sep 2025
Big refurb of 1650 sq ft flat, plus building 2 additional ensuites. Initial quote seemed reasonable but then once in, costs started to rise exponentially. Some work was done well, like the building component and flooring, but finishing was poor. Painting, particularly of internal doors, was done poorly, without removal of fittings first, so lots of overpainting and insufficient prep and coats. Regrouting and redecoration of front and rear patios was done poorly, with weeds already poking through. There was damage to existing bathtubs and WCs by not protecting surfaces and pouring waste materials down the pan. Everything was an argument with constant demands for more money e.g. front door only painted one side as the other side not included under "paint door". Lots of "snagging" - I only have manual on/off control of heating and hot water as "smart" thermostat won't connect, there are odd water pressures through some fixings...and now there's a leak under one of the WCs...
REWORKS LONDON LTD
Rating: 5 out of 5
Extension Builder in The City
Our team comprises eager on-demand workers, with years of experiences, who deliver exceptional services to both residential and commercial customers all around London. Whether you need a painter that will not miss a single mark, or an electrician that assists you in emergencies, we will make sure to send you our specialized and competent workers for all your needs.
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Latest review:
Gas Work- 11 Dec 2020
Repaired and very happy!

4.6

Top rated Extension Builders

Our Extension Builders in The City, are rated 4.6 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 The City?

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 The City 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 The City who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in The City?

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

Find extension builders in The City with MyBuilder

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

Step 2: Compare different extension builders in The City

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

Step 3: Hire The City extension builders with confidence

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

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

What to ask a The City extension builder before hiring?

Before hiring an extension builder in The City or extension building company in The City, 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 The City?

An extension builder in The City 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 The City 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 The City?

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 The City 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 The City 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 The City

Can an extension builder in The City help with planning permission?

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

Many The City 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 The City help with materials and finishes?

Yes, most extension builders in The City 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.