Loft Conversion Companies in Merton

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 4.4 (12 reviews)

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Some of our top rated loft conversion companies in Merton

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KW Construction
Rating: 5 out of 5
Loft Conversion Company in Merton
1st an 2nd fix carpentry General building work Loft conversion
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Latest review:
Carpentry- 16 Feb 2024
He was very professional 5 Star also he was very tidy as well Can’t praise him enough Great value for money
E.V Roofing
Rating: 5 out of 5
Loft Conversion Company in Merton
I am running my own business now. I am a carpenter first and second fix. I have a lot of experience 7 years (2 years in Norway+5 years in UK). I am dedicated to providing top quality house renovations, loft conversion , roofing (tiling,fibreglass),house extension ,flooring, doors, windows, kitchen , wooden floors .
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Latest review:
In the round I had a very good experience when working with Ermal on our 6 month project, Reliability, quality and speed all exceeded expectations. I would recommend Ermal and his team, especially for any carpentry.
Prodec Construction ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
With over 16 years experience our reputation has developed very soundly as a specialist building contractor. We work on many types of projects including domestic houses, health care sector, and housing developers. Our service is designed around delivering the highest standard and quality.
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Latest review:
Painting & Decorating- 18 Jun 2025
Martin has done an excellent job for us. He is professional, polite and helpful.
M services
Rating: 5 out of 5
Loft Conversion Company in Merton
We can perform a wide range of tasks across multiple trades, including carpentry, full bathroom refurbishments, extensions, conversions, refurbishments. 2S Constructions Ltd Company number: 13606134
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Latest review:
Extensions- 27 Aug 2025
Dunster House Garden Office (5m x 2.5m build) We are absolutely delighted with the garden office that Michal and Lenka built for us. From start to finish, their expertise and attention to detail shone through. They guided us with thoughtful consultation, listened carefully to our ideas, and delivered a finished office that is both beautiful and practical. Their work ethic, professionalism, and friendly approach made the whole process stress-free and enjoyable. The quality of the build is outstanding, and it’s clear they take great pride in what they do. This was a 10/10 experience, and we could not recommend them highly enough! We also used them again for another job to build install a Pantry; Michal and Lenka recently built and fitted a bespoke pantry for us using Howdens units, and we are beyond impressed. Their knowledge and craftsmanship are second to none. They made excellent recommendations throughout the process, ensuring the final result was exactly what we needed.
Albert & Simon
Rating: 4.7 out of 5
Loft Conversion Company in Merton
We specialize in all types of building jobs, delivering the highest quality craftsmanship. While we offer competitive pricing, our focus is on providing exceptional work rather than competing solely on price. We may not have many reviews on 'My Builder' as we often take on larger projects for one client over an extended period or rely on recommendations. Your satisfaction is our priority!
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Latest review:
Kitchen Fitting- 3 Oct 2024
Albert and Simon were very professional. They delivered the job to quality and were very helpful and supportive with challenges during the project as well as add on tasks. Thier price was also competitive and fair and are very open to feedback. My kitchen and lounge is so beautiful and flush! I love it, you won't regret giving them a project.
Balham construction Ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
Balham construction are a London based refurbishment and construction company that offer a wide range of services from full Property refurbishment to extensions and loft conversions and everything in between
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Latest review:
Tom and the team completed a full renovation of my flat. This included refurbishment of my kitchen, bathroom and general redecoration. The team were extremely hardworking and punctual and no job was too difficult for them. I would highly recommend their services.
Swami Builders Ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
General Builders - Extension - Loft conversion - Painting - Bathroom - Kitchen - Flooring - Roof work - Double glazing - Gutters and Fascias - Garden paving - Plumbing and Central Heating - Electric
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Latest review:
Fitted new bathroom Fitted new kitchen Plumber and tiling
shalom property development ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
Shalom Property Development ltd is a small construction company based in the Croydon area. We specialize in property refurbishment, house extensions, loft conversions, garage conversions, etc. We also undertake projects like plastering, painting/decorating, electricity, plumbing, tiling, flooring(laminate, wood, bamboo), bricklaying.
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Latest review:
Plastering- 6 May 2025
Amazing guys. Hardworking, tidy, professional. They worked in our house for 3 months and we were super happy with the work and everything. We invited them to do more work later on. 100% probably the most sincere and trustworthy builders we met. Only them. No one else from now on.
Mels Construction Solutions
Rating: 5 out of 5
Loft Conversion Company in Merton
Welcome to Mel’s Construction Solutions, specialising in loft conversions and house extensions. With 15 years of experience, we have gained extensive knowledge and expertise in providing top-quality services to our clients. We offer full building services for Loft Conversions Extensions Refurbishments Bathroom and Kitchen instillations All our work is guaranteed and done to the highest standards with competitive prices given.
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Latest review:
I would highly recommend Meli and use his service again. He is reliable, friendly and extremely personable. Meli saved time and cost by explaining what could be done better. Very talented all rounded experience. He’s a great contractor and I am very satisfied with his work. Thank you Meli!
Tijs Bauer Design and Build
Rating: 5 out of 5
Loft Conversion Company in Merton
!!! I love to build !!! And it began 15 years ago after I finished my art and ceramics A levels. My first job was for a small building company in Sussex. After 3 years gaining experience I began an NVQ brickwork course, whilst also working with a brickwork contractor to gain site experience. 10 years ago I began running my own business managing full projects, particularly specialising in extensions, conversions and bespoke joinery and have extensive experience of planning and building in London.
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Latest review:
Loft Conversion- 9 Feb 2017
Very pleased with the quality of work and as importantly the management of the job. Tijs and his guys were very friendly and happy to make changes as we went. I have done a number of building jobs with different builders previously and this was by far the best experience I've had. Would definitely recommend and use again.
SAM DESIGN & BUILD LTD
Rating: 4.4 out of 5
Loft Conversion Company in Merton
Having a wide range of experiences in designing and constructing extensions, loft conversions, alterations and new buildings with planning, structural drawings and calculation, we provide full range of service from planning and design to construction. Electrical, gas safe, plumbing and heating are also part of our wide range of services. Load bearing wall removal, chimney breasts removal, refurbishing kitchen and bathroom were also one of the most accomplished projects in last year. Look forward to hear from you.
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Latest review:
Loft Conversion- 18 Aug 2024
done a good job, on time
Top Building Ltd.
Rating: 5 out of 5
Loft Conversion Company in Merton
Top Building was set up in 2009 to combine the skills of various trades specialists who deliver bespoke projects to customers looking for high quality home improvements. We specialise in kitchen/bathroom & home renovations. We have the equipment & experience necessary for delivering your project.
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Latest review:
Restoration & Refurbishment- 31 Aug 2015
We have had quite a bit of work on our property in the last few years and the final project was to be our bathroom with the focus around a beautiful copper bath which has been sitting in the spare room waiting to be installed for nearly a year. We needed a company that could deliver a very high standard of work at a competitive price. Top building were not only very fair and competitive but wonderfully detailed in their approach both in quoting and their workmanship which is second to none. Vladimir and team understood the project from day one – made a few trips before hand which built the relationship and made myself and my husband very comfortable with our decision to instruct Top Building. What I enjoyed most is that Vladimir made great suggestions and offered money saving advice. Nothing was too much trouble and I really felt the team got behind the project. The knowledge and expertise is of an exceptional level. We had a few odd jobs that needed to be done which the team (Evo and Dimitri) welcomed and efficiently completed. I very much appreciate the patience and flexibility shown by the team and Vladimir’s brilliant way of keeping us informed every step of the way. Bathroom was totally refurbished including new Walls, plastering, electrics, tiling and new boiler. It really has been a pleasure working with the team – I will most certainly be recommending them.
All in ONE home experts
Rating: 5 out of 5
Loft Conversion Company in Merton
All in ONE Home Experts At All in ONE Home Experts, we are your trusted partner for all your home improvement needs. Specialising in bathrooms, kitchens, general refurbishments, and all aspects of building work, we bring your vision to life with precision and care. With a commitment to excellence, our skilled team delivers bespoke solutions tailored to your style, budget, and lifestyle. Whether you’re dreaming of a luxurious bathroom, a modern kitchen, or a complete home makeover, we handle every detail from start to finish, ensuring a seamless and stress-free experience, fully insured for your peace of mind From renovations to full-scale building projects, All in ONE Home Experts combines craftsmanship, innovation, and professionalism to transform your space into something truly exceptional. Let us help you create the home you’ve always wanted.
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Latest review:
Bathroom Fitting- 12 Oct 2025
Top work thank you Nick and team sorted a botched job, all good now, lesson learnt We now have a fully functioning bathroom, happy family happy life Pay cheap pay twice !! That’s what I did Excellent work
JM C&D Ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
We are over 10 years experienced and well established construction company based in Worcester Park in Surrey. We are specialised in loft conversion, house extension, new build and basement and commercial works. We do quick response to all our client's enquires and build fast as well.
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Latest review:
Extensions- 27 Jun 2022
Very very happy with Michael's work. From the day one of the meet till end of the project, he and his team been quite professional and have been working with high standards. We received range of quotes from different builders and Michael's quote was somewhere in middle with good quality of work which we have seen during our site visit for his other projects. So, decided to go with him. One really good thing you get from Michael is plenty of ideas and options. From our original drawings, he suggested some changes which were really useful. Being a lay people, During the project we were confused in some design options and Michael really assisted with 3 to 4 options and he suggests which one is the best from his view point but also been flexible if we wanted to do in specific way. He was daily coming to the site to monitor quality and progress of the work. All his team is highly skilled and experienced. The all do general building but when it comes to specific, they have specific tiles, electrician, plumber, painter etc etc who finishes the job at very high quality. They work flexible to complete the job on time and keep the area safe and tidy. In terms of managing project in budget, we had a good experience where Michael will in detail explain what is covered in agreed amount and where the extra cost will incur if there are major changes. I am taking this much time to write this review so that it can help others to see my good experience with Michael. 100% best.
London Homez ltd
Rating: 5 out of 5
Loft Conversion Company in Merton
We are Experienced but young passionate and dedicated Builder/Contractor. Don’t ask if we can do this or that just ask when we can do it. We carry out all type of works for residential and commercial properties. We provide all certificates as well. We are one door shop to carry out every type of work. You would be relieved from contacting different people for one project. We do welcome small and big jobs.
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Latest review:
I had my double side and single rear L shape Extension which had kitchens and bathrooms with bedrooms. It was turnkey project and didn’t know them before but they are Pro Contractor as they got all planning permission approved with structural calculations. They completed work in time with high standard quality and regulations and got my certificates from council. I would recommend them as Pro builder all the time.
House Refurb
Rating: 4.9 out of 5
Loft Conversion Company in Merton
We have built our livelihoods on remodelling people’s homes, increasing their size and value. From the simple to the lavish, no matter how big or small, we’ve experienced it all and we can help you every step of the way offering a comprehensive service and take care of all aspects of your project, from initial plans through to full completion. Our skilled workforce of reliable professionals is on duty to offer you quality building work, competitive prices and exceptional customer service.
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Latest review:
Bathroom Fitting- 14 Jan 2015
Highly recommended. Work was done on budget and on time. Narcis and Levi always happy to help and listen to any queries and adapt as the job went on. Left the place clean at the end of each every day. We had a small leak under the sink after the job was finished which was sorted out promptly. The finish (painting/tiles etc) was of decent quality. Bathroom was completed 6 months ago and no problems since.

4.4

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Merton, are rated 4.4 out of 5 based on 12 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.