Loft Conversion Companies in Merton

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 4.6 (11 reviews)

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Some of our top rated loft conversion companies in Merton

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Happy Building London Ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
Hello, We’re an architectural design and construction management company with a love of creative inspiration. We help turn dreams and visions into reality for people who aspire to live in exceptional contemporary spaces. Big ideas are our thing. Along with expertly costed build packages. Then there’s our end-to-end project management service, perfect for people who want to leave nothing to chance.
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Latest review:
Restoration & Refurbishment- 17 Jul 2016
Valter was very impressive on his initial visit with some exciting ideas for the house improvements and we had no hesitation in choosing Happy Building above the other two building firms who quoted. Having signed off on the budget and scope of work, Valter's team of builders arrived. We were hugely impressed with the skill, experience and work ethic of the team; the fact that they arrived early each morning smiling underlined the "Happy Building" epithet; Jarek, the site foreman, had an especially cheery demeanour. The work involved stripping the walls back to bricks, removing walls, reinforcing foundations, plastering, extending the bathroom and removing one bedroom to create a large ensuite bedroom. The latter certainly would not have been done without Valter's vision and patience in explaining how it would look. We were able to deviate from the original plans without any problem which was very important in achieving the final look which we had desired. Valter was very careful in sticking to time and budgets which I had never experienced before with builders. The kitchen, bathroom, two bedrooms, living room and hallways were finished to the highest possible specification within our budget. There were one or two small features which, with hindsight, we would have improved such as door handles and shower fittings, however this was down to us not specifying exactly what we wanted. These are very minor details and a tiny part of the overall picture.
Esskay Homes
Rating: 4.9 out of 5
Loft Conversion Company in Merton
We are a Development and Construction company based in Bracknell dealing with all aspects of builds and refurbishments. Our staff are Gas safe and NICEIC registered. We can supply a free of charge quote. Kitchen Bathroom Decorating Extensions Architecture drawings Planning Permission Any refurbishment for your home or office.
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Latest review:
Conversions - General- 28 May 2024
Ravi and his team have been brilliant - and reassured my all the way through the addition of a downstairs toilet definitely would use again
XTEND LONDON LTD
Rating: 5 out of 5
Loft Conversion Company in Merton
Hello, we are XTEND London LTD. We have over a 100 years combined experience as a team in the building industry specialising in extensions, roof conversions, plastering, house refurbishments and decoration, We have got a hardworking and skilful team of qualified trades men including electricians and gas safe plumbers ready to meet your building needs and ideas! We look forward to working with you to build your dream home. Many thanks, XTEND LONDON LTD.
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Latest review:
Loft Conversion- 13 Oct 2020
Lucas and his mate were very profetional. They have completed the job to the high standard and quality. Both were very decent and job finished neat and tidy. Reasonable price and no hidden cost. Highly recommended
Style Building Ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
Style Building Limited is a leading building contractor within the residential and commercial sectors, our aim is to provide our clients with an experienced management team that can undertake the full range of construction projects, from the sensitive refurbishment such as your project to high specification new build projects.
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Latest review:
Restoration & Refurbishment- 4 Jun 2013
Kiril and his team did an excellent job. Kiril puts you at ease and he knows how to communicate well answering any queries fast. His quote was very competitive. He went out of his way to assist me with sourcing items such as coving, cupboards, ceiling roses and skirtings. Highly recommended.
JWC&BS LTD
Rating: 5 out of 5
Loft Conversion Company in Merton
I am fully qualified carpenter with NVQ qualifications. I’ve had experience working with listed building, extensions , loft extension, roofing , first fix , second fix carpentry , kitchens and flooring
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Latest review:
Decking- 30 May 2020
Great work. Nice and tidy. Would use again for general carpentry needs.
Deianoff Builders UK Ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
At Deianoff Builders Ltd, we deliver a standard of workmanship and finish that sets us apart—quality that’s difficult to find elsewhere. Every project we take on is approached with the highest level of professionalism, precision, and pride. We are a family-run business with over 30 years of experience in building, renovation, and property conversions. Our team brings traditional values together with modern techniques to ensure consistently exceptional results that are within budget. Whether it's a full-scale extension or minor repairs, we treat every task with the same dedication, detail and care. We are fully insured and committed to a clean, respectful, and hassle-free service from start to finish. Our reputation has been built on trust, transparency, and a genuine passion for quality construction—because we believe great workmanship should last, and with us, this always speak for itself.
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Latest review:
Kitchen Fitting- 5 Aug 2022
I am pleased to recommend Mr Deianov my kitchen Fitter as first class. His ideas and recommendations has been valuable saving me money. He is clean and tidy and has worked within my budget.
London project contractors ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
Welcome to London Project Contractors LTD – Your Trusted Home Transformation Experts At London Project Contractors LTD, we specialise in bringing your property dreams to life. Whether you're looking to expand your space, upgrade your interiors, or improve your home's energy efficiency, we've got you covered. Our core services include: House Extensions – Seamlessly add space and value to your home. Loft Conversions – Turn unused lofts into stylish, functional living areas. Bathroom Fittings – High-quality installations designed for comfort and elegance. Insulation Services – Energy-saving solutions to keep your home warm and efficient. Property Conversions – Expertly transforming spaces to suit your lifestyle. With years of experience and a commitment to quality craftsmanship, we ensure every project is delivered on time, on budget, and to the highest standard. Let us help you build better – get in touch today for a free consultation!
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Latest review:
We recently had a loft extension completed along with wooden flooring throughout the house, underfloor heating installation, and a full silicone render — and we couldn’t be happier with the results! The team were an absolute pleasure to work with from start to finish. Their innovative and creative thinking really set them apart — they found smart solutions to challenges and helped us maximise space and style in ways we hadn’t even considered. What impressed us most was their attention to detail and how clean and tidy they kept the site throughout the project. It made a huge difference knowing the work was being done to such a high standard, without the usual mess and disruption. Whether it was a small detail or a big task, nothing was ever too much trouble. No job was too big or small — they approached everything with the same level of care and professionalism. If you’re looking for a reliable, forward-thinking team who take real pride in their work, I couldn’t recommend them more highly!
BUILD 4 YOU LTD
Rating: 5 out of 5
Loft Conversion Company in Merton
We are a small family business with long experience in private and commercial building projects. With a dedicated team of skilled traders, we can cover all aspects of refurbishment and I always make sure our customers are 100 % satisfied without compromising between value and quality.
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Latest review:
Kitchen Fitting- 18 May 2021
Ivan ended up installing a nice new neat bathroom instead of a new kitchen. He even helped to obtain a quote for the new kitchen unit. We worked together to ensure all problems with the materials and measurements were ironed out. He and his team even did some further works following my snagging. Will definitely use again. Thanks Ivan
Kingston Surrey Construction Ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
We are a construction company with over 25 years experience. We Have worked on major projects including extensions, loft conversion and refurbishments. Including smaller projects, new bathroom and kitchens.
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Latest review:
Restoration & Refurbishment- 21 Apr 2024
Got my cloakroom re-done. They r friendly, professional, attention to detail, with clearly tens of years’ experiences. Reasonable rate as well.
ST Maintenance London Limited
Rating: 5 out of 5
Loft Conversion Company in Merton
Welcome to ST Maintenance London, Are you looking for top-quality painting, decorating, and general maintenance services? You've come to the right place. With 15+ years of experience, we pride ourself on delivering exceptional craftsmanship, attention to detail, and reliable service that transforms your space into something extraordinary. Whether it's a fresh coat of paint, a complete redesign, or essential upkeep, were committed to ensuring your satisfaction. Let’s make your vision a reality—efficiently, affordably, and beautifully. Contact me today to discuss your next project.
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Latest review:
I had the pleasure of Charlie and Kurt coming to do some work for me at one of my properties as the place hadn’t been touched in years and needed some serious TLC! They had replaced the ceiling in the bathroom, redone the decking and refitted some appliances as well as repairing the pointing outside and redecorating the entire house. This was a big job as the house is old and had defects all over in awkward places but they made sure to complete all touch ups to ensure the finish was to a good standard. They even tidied up the garden and had replaced some benches I had outside for free which was very much appreciated. Definitely recommend them for any jobs locally big or small! Thanks again guys :)
Alain Carini
Rating: 5 out of 5
Loft Conversion Company in Merton
Hi There, I am a structural engineer with 8 years experience in residential projects (new builds and refurbishments). I have decided to start my own business as soletrader. I am proficient with structural sotware, Autocad and drainage design.
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Latest review:
Based on architect recommendation, we contracted Alain on a private basis to produce structural engineering designs for our home renovation. He undertook a site visit and then produced structural designs to support a large number of elements related to new support beams, lintels etc. These have been iterated with the architect and the process has been very smooth. He was very responsive and nice to interact with. Wouldn't hesitate to recommend as a structural engineer for the type of project we undertook (loft conversion, new pitched roof, new openings within walls and ground floor open plan conversion)
Solid Group Renovations
Rating: 5 out of 5
Loft Conversion Company in Merton
We are a highly experienced and skilled team specialising in property refurbishment and renovation. Our expertise includes HMO conversions, loft conversions, house extensions, and complete property refurbishments. We work closely with our clients throughout every stage of the project, ensuring clear communication and a smooth, stress-free experience. We are always accessible and committed to keeping you informed, so you remain in control of your project from start to finish. Our goal is to deliver high-quality workmanship and bring your vision to life, helping you achieve the renovation or property transformation you have always envisioned.
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Latest review:
Bathroom Fitting- 20 May 2026
Saba and Zura were outstanding and an absolute joy to work with on this project. I initially hired them to fit my new bathroom, and I was so impressed with the quality of their work, that I asked them to complete the rest of my renovations, which included new flooring, decorating, installing wall panels and fitting a new kitchen. All of it were completed to the highest standards and ahead of schedule.They are very professional, friendly, hard working and communicates so well. This is my third project, and by far the most stress free one, I couldn't recommend them enough! Thank you guys
Teimourazi Bachsoliani
Rating: 5 out of 5
Loft Conversion Company in Merton
Hi, my name is Temo. Our team has combined experience of more than 20 years and we have an excellent reputation, for high quality work, tidy finish and friendly service. My team does all types of jobs including extension, loft conversion, full refurbishment. We always deliver best quality job for a reasonable price.
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Latest review:
Conversions - General- 23 Jul 2025
I recently had the pleasure of working with Teimo and his team on a full renovation of a probate house, and I couldn't be happier with the results. The entire house needed a complete overhaul, including two new bathrooms, a kitchen extension, new doors, skirting, walls, plumbing, electrics, as well as front garden paving, a brick wall, and back garden fencing. The quality of the work is outstanding. Teimo and his team take immense pride in everything they do, and it really shows in the final product. They are not only highly skilled but also incredibly polite and tidy, ensuring the worksite remained clean throughout. They worked hard, from 8:30 AM to 5:30 PM every day, and completed the project on time without any issues. What truly stands out about Teimo is his honesty and clear communication. He’s upfront about everything, and you can trust that the price you’re quoted is the price you’ll pay—there are no surprise cost increases along the way I highly recommend Teimo and his team
Roofing and Building
Rating: 4.9 out of 5
Loft Conversion Company in Merton
I have 15years experience in Roofing & Building. Im am based in South East London and take great pride in the quality of workmanship. I like to work with the customer in order to keep the customer satisfied, working on a word of mouth basis for our business.
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Latest review:
Roofing (Flat)- 10 Feb 2020
Ben is a fantastic tradesman and I will definitely use his company again for any roofing work.
5 Star Renovations
Rating: 5 out of 5
Loft Conversion Company in Merton
Hello, We are a home renovation company specialising in Kitchens, Bathrooms and all other internal works. High quality work whilst working at a good pace to ensure completion. We look forward to working with you.
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Latest review:
Plastering- 25 Jul 2024
Lewis and his team were very professional. They treated my house with respect. They delivered the job on time and to an excellent standard. Competitive price and very efficient service, will definitely use him again.
Wilson
Rating: 5 out of 5
Loft Conversion Company in Merton
Serving the local community, we offer expert building services tailored to your home’s needs. Whether you are planning a modern loft conversion or a structural home renovation involving complex steelwork, our skilled team is here to help. We combine professional management with quality craftsmanship to turn your vision into a safe, beautiful reality, all while maintaining a tidy and respectful worksite
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Latest review:
Top-quality service from a very reliable building team. Wilson provided a clear, transparent quote with no hidden surprises, and completed the job right on schedule. The workmanship is excellent, and the team worked incredibly hard to get everything finished to a high standard. It’s hard to find builders this honest and skilled nowadays. 5 stars well deserved!

4.6

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Merton, are rated 4.6 out of 5 based on 11 reviews from customers like you.

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What services are offered by loft conversion companies in Merton?

Converting a loft often entails many jobs - some of which you likely haven’t even considered! Fortunately, a professional loft conversion company in Merton will be able to handle multiple services, ensuring your transformed loft is fit for purpose.

Some of the services loft conversion companies can provide include:

Full loft conversions: Complete design and build projects when structural alterations are needed
Dormer loft conversions: Add extra headroom and floor space with a dormer extension
Velux or rooflight conversions: Ideal for lofts with good existing height; minimal structural change required
Hip-to-gable conversions: Extend the sloped roof to create more usable space
Mansard conversions: A major structural change offering maximum space.
Loft storage conversions: Add flooring, lighting, and insulation for clean, usable storage
Skylight or roof window fitting: Install natural light solutions like Velux windows
Staircase installation: Design and build bespoke stair access to your new loft
Insulation, heating, and ventilation upgrades: Ensure comfort and compliance with energy standards
Design and planning services: Architectural drawings, planning permission, and building regulation approval

Post your job to MyBuilder and you'll be matched with loft conversion companies in Merton who are interested and available to help. And with the reviews of past customers and the freedom to compare the quotes of similar tradespeople, all in the same place, the ball’s in your court.

Average costs of loft conversion companies in Merton

Loft conversions tend to be charged on a project basis, rather than by the hour, as they often involve weeks or even months of work.

The cost of your loft conversion depends on a few things, including the style of loft conversion and materials you choose and the size of your property.

That being said, here are average prices for common types of conversion work:

Full loft conversions: £45,000–£70,000+
Dormer loft conversions: £55,000–£85,000+
Velux or rooflight conversions: £25,000–£45,000
Hip-to-gable conversions: £50,000–£80,000+
Mansard conversions: £70,000–£100,000+
Loft storage conversions: £10,000–£20,000
Roof window fitting or skylight installation costs: £1,000–£2,500 per window
Staircase installation costs: £2,000–£5,000
Insulation, heating, and ventilation upgrades: £2,000–£6,000
Design and planning services: £1,500–£4,000

Take a look at our guide to loft conversion costs to get a more detailed breakdown of the different options available when using a Merton loft conversion company.

Find a loft conversion company in Merton with MyBuilder

When you’re planning major work like a loft conversion, you’ll want to find the right tradesperson for the job. The great news is, MyBuilder has already done all the time-consuming work for you.

All you need to do is post your job on MyBuilder, completely for free, and we’ll share it with loft conversion companies near you in and around Merton.

Step 1: Post your job on MyBuilder

Provide a detailed description of your loft conversion project, including the type of conversion you want, any structural changes, preferred materials, and your ideal timeline. Once posted, local loft conversion companies in Merton can view your job and register their interest.

Step 2: Review and compare Merton loft conversion companies

Browse the profiles of interested loft conversion companies. On MyBuilder, you can view photos of previous projects alongside customer reviews, compare quotes, and see the types of conversions they specialise in.

Step 3: Contact and discuss your project

Once you’ve reviewed local Merton loft conversion companies, you can reach out to those that interest you to ask questions, clarify details, and request more specific quotes. At this stage, be sure to discuss vital aspects like planning permission, design options, and estimated timelines to ensure the company meets your requirements.

Step 4: Hire the right Merton loft conversion company

Once you’re satisfied with their experience, quotes, and approach, you can confirm your hire and start planning your loft conversion.

You can also take a look at our loft conversion specialist hiring guide to help inform your choice. All tradespeople undergo checks at registration - such as verifying ID documents, company details, and certifications for regulated jobs and doing skill assessments - allowing you to hire with confidence.

Questions to ask local loft conversion companies in Merton

Choosing the right loft conversion company for your job requires finding someone who understands your home and your goals.

Find out which company can share your vision by asking the following questions:

What experience do you have with loft conversions in Merton?

A local loft conversion company in Merton will know the types of properties and building styles common in your area, as well as the planning and building regulations that apply. Ask about similar projects they’ve completed locally.

Are you insured, and do you offer a warranty for your work?

Insurance protects your home during the loft conversion process, while a warranty shows the company’s confidence in the quality and durability of their work.

How do you handle planning permission and building regulations?

Established loft conversion companies in Merton should understand local planning rules and building regulations. Ask how they’ll manage permissions, inspections, and compliance to avoid delays or legal issues.

What is included in your quote?

Ensure the quote covers all essential aspects of the loft conversion: structural work, windows or skylights, staircases, insulation, labour, and any additional fees. Understanding this upfront prevents unexpected costs later.

Do you manage the project from start to finish?

Some Merton loft conversion companies offer full project management, coordinating architects, builders, and tradespeople. Others may only handle part of the conversion. Clarifying this early on helps you understand what support to expect.

FAQ: Common questions about loft conversions in Merton

How long does a loft conversion take?

Typically, a loft conversion can take between 6 and 12 weeks, depending on complexity, planning permissions, and any structural work required. Be sure to discuss the timeline with any potential loft conversion companies in Merton before agreeing to start the work.

Do I need planning permission for a loft conversion in Merton?

Many loft conversions fall under permitted development, but some require planning permission, especially if you’re adding a dormer, extending the roof, or living in a listed building. A professional Merton loft conversion company can advise and handle permissions for you.

Will a loft conversion affect my home insurance?

Yes, you’ll need to update your home insurance to cover the conversion. Inform your provider about structural changes, additional rooms, and any changes to utilities or heating systems.

Can I stay in my home during the loft conversion?

Many loft conversions allow you to remain in your home, though noise and dust are inevitable. Some Merton loft conversion companies offer strategies to minimise disruption, but in complex projects, temporary relocation may be advisable.