Loft Conversion Companies in Knightsbridge

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 4.5 (13 reviews)

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Some of our top rated loft conversion companies in Knightsbridge

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TechnoHeat
Rating: 4.8 out of 5
Loft Conversion Company in Knightsbridge
We are Gas Safe and Heating engineers for over 15 years and and have been involve in all aspect of Gas.Heating.Plumbing jobs including boiler fault finding and Heating problems also we have very good reference in the bathroom and shower installation. Member of Vailliant Advance ,Baxi works to be able to register a new boiler for 7 and 5 years part and Labour warranty. No call out charges.
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Latest review:
Plumbing- 24 Sep 2018
Had confirmed I would take a day off for the job. Received a text on the day at the time he was meant to come saying van had broken down and could not come. Then offered to send a friend to do the job. Waste of a day and spent morning running around buying the equipment. If the van did really break down then that’s a fair excuse. Negative experience from my end.
URBAN SPACE BUILDING & PLUMBING LTD
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
We are a well-established local building company with professional tradesmen. We specialise in all aspects of residential building works and refurbishments such as bathroom, kitchen & full refurbishments, as well as loft conversions & extensions. We have an in house team of experienced and professional tradesmen with skills to complete any project to high standards, on time and within budget. All our work is guaranteed, and we are happy to supply references on request.
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Latest review:
Kitchen Fitting- 21 May 2026
Michael and his team were brilliant from start to finish. They installed a new kitchen and bathroom for us, and the quality of the work was excellent throughout. The team was professional, reliable and always went the extra mile to make sure everything was completed to a high standard. We were extremely pleased with the results and would highly recommend them to anyone looking for quality workmanship and great service.
Stn Contacts Ltd
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
Should you require a quotation for any works, or even just advice, please call /e-mail us and we will be happy to help you: Basements Extensions Loft conversions New builds Refurbishments Kitchens and bathrooms Carpentry and joinery Roofing Insurance work Design and build
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Latest review:
Stan and his workers are very reliable, professional with there workmanship and very good value for money. Compared with other quotes I received. I had a ground floor and 1st floor extension and a new large kitchen installed and a large bedroom ensuite on the 1st floor.
Abu Fahad Design & Build
Rating: 3.9 out of 5
Loft Conversion Company in Knightsbridge
I am an Architecture & Planning Consultant. I have been practising architecture for over four years now.I have experienced many complex planning applications and managed to achieve approvals successfully. In my team, I have structural engineers and builders to provide a full package to my clients from design to build.
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Latest review:
Architecture- 7 Feb 2019
Professional, honest and reliable.
ALT’s Builders
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
We are a family run business with more than a decade of experience. At ALT’s Builders Ltd we pride ourselves on an efficient and friendly service, and achieve 100% costumer satisfaction ethic. So no matter how big or small your job is we can help. ALT’s Builders Limited is a leading and reputable Construction Company serving around London Ever since we opened for business, we’ve taken a comprehensive approach to construction industry, providing our clients with a wide range of services to cover their needs. our clients are our Number one priority and we go extra mile to make sure they’re completely satisfied. we stand by the excellence of our work and provide clients with personalized attention based on their specific needs. With this service, we’re fully prepared to tackle even the most complex projects and stand by the exceptional quality of our work.
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Latest review:
Loft Conversion- 31 Mar 2026
We recently hired Altin to do our mansard loft conversion and honestly, it was a really good experience from start to finish. He was always on time, worked really hard, and his whole team put in a lot of effort every day. Communication was easy and straightforward, which made things much less stressful for us. The project was finished on time as agreed, and we’re really happy with the quality of the work. Altin was also super helpful whenever we had questions and helped a lot with building control, which made a big difference. It’s quite a messy job (cutting through the ceiling and putting in a staircase), but they did everything they could to keep things as clean and tidy as possible, which we really appreciated. Overall, we had a great experience and are very happy with how everything turned out. I’d definitely recommend Altin to anyone thinking about a loft conversion.
AVStructures
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
A.V. Structures is a construction company working with top-rated contractors and providing services to private clients around London. Our highly experienced team of builders has excellent skills and knowledge gained delivering projects locally and abroad. We approach each building process following Environmental, Health, and Safety guidelines. All our quotes are free, and we will always try to get a quote to you within a week of us visiting your property.
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Latest review:
Demolition- 24 Nov 2021
We employed A.V Structures for the building of an external wall around our property, the removal of a garage and the installation of railings and gates. Throughout the 4 week programme we could not have been happier with their work. Arrival was prompt, their pace of work displayed energy and purpose. They were mindful of us and our neighbours and made sure the area was left clean and tidy at the end of each days work.in addition the workmen were courteous and kept us fully informed. Alex, the owner of the company, kept in close contact with us to assure himself of our satisfaction. He came on site at intervals to check that all was going according to plan. We therefore felt completely confident that quality and outcomes were important to him. Employing A.V Structures was a decision we were pleased to have made. We would use them again without hesitation and recommend them highly to anyone considering similar work.
Onyx Services Limited
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
Onyx services Ltd which is part of the Wigwam construction Group has been in the home improvements business for many years. All engineers are Gas safe and NIEIC registered. We undertake all types of building, construction, plastering, painting as well as heating, plumbing & electrical installations. Onyx has £5 million public liability insurance. All work comes with written garuantee. All major debit/credit cards accepted.
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Latest review:
Gas Work- 26 Oct 2025
I was able to get my own boiler and just pay for the extra material and installation. Not all traders accept this. The price was very competitive. I was sceptical at the start but was reassuring on how quickly the job was completed. There was an issue with the thermostat but was sorted out the following week. The gas certificate, building compliance and boiler registration was completed promptly. Would definitely recommend, please allow Shami to quote before making a decision, you won't be disappointed.
South London Rooms Ltd
Rating: 4.5 out of 5
Loft Conversion Company in Knightsbridge
We run a team of home Improvement professionals. We carry out all types of home improvement services. We specialise in Loft Conversion and Extentions. We are based in South London area. We aim to provide the best quality work for our customers.
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Latest review:
Carpentry- 28 Jun 2022
I do everting in carpentry do first fix and secund fix . Thanks for conct me.
Maxmar Construction Ltd
Rating: 4.7 out of 5
Loft Conversion Company in Knightsbridge
We are a company that pride ourselves on taking excellent care of the ‘whole project’, from design to completion. We can, on your behalf, manage your project, coordinating all the required trades to turn up as and when required, leaving you to get on with daily life. Your dream home could be closer than you think, allow us to turn your ideas into reality. My company has lots of experience working on many different projects, big or small! On a personal level I am a honest hardworking individual. I have a lot of experience in all aspects of building work. I am familiar with building regulations and used to dealing with building control officers from the various local authorities. I have a fully skilled team of builders who cover all types of general building maintenance including kitchen and bathroom fitters, plasterers, flooring specialists, painters and decorators. The company offers a fully insured and guaranteed comprehensive
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Latest review:
Conversions - General- 21 Jul 2013
Flooring & lighting to extension not completed appropriately and resulted in later problems.
Agnuss Construction Ltd
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
We are a construction company that operates in the local area mostly, but we can also cover all the other areas of Greater London. Our Services include Extensions, Loft Conversions, Refurbishments, and basically all the aspects of building work. We specialise in residential and business projects.
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Latest review:
Agnuss Construction carried out and completed our house renovation, kitchen extension and loft extension successfully. Elio and his father, Mario were very communicative throughout and very reliable. The works were carried out on time and on budget. I would be happy to recommend Agnuss Construction and use them again in the future.
Samz Construction Services ltd
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
We are a small construction firm aiming to provide high quality work. We do new built 'conversion, loft and extension, Refurbishment and all kind of building works. We can manage the building job from start to finish and help the clients with planning, party wall and structural drawings.
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Latest review:
Loft Conversion- 7 Aug 2023
I highly recommend Sohail Faisal of Samz Construction Services Ltd. We chose Sohail's company to complete our Hip to Gable with Rear Dormer Loft Conversion in Guildford and we are delighted with the work. The job was completed to a high standard, within the expected timescale and on budget. Sohail's communication throughout is excellent, taking time to explain what work will be completed on which days, what is involved and how many people will be attending on which days to complete the work. Sohail also let me know exactly when deliveries of materials were arriving and when the skips would be collected etc. Sohail's team of builders are all very friendly, polite, and respectful and do a great job of cleaning up after themselves at the end of each day. In terms of price and payment schedule, this was fair and efficient. Sohail has a payment schedule that works really well - invoicing for staggered payments at certain points, i.e. on delivery of materials, then when the building inspector signs off the first job etc. this makes you feel at ease with the job and confident that everything is always on track. All around I am really happy with the project and have no doubts about recommending Sohail to family and friends - I have already asked Sohail to quote on my next project.
W4 Builders
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
We do all kind of building services in west London. We do painting, decorating as well as plumbing and electrics. We do bathrooms and house extensions and full property refurbishments.
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Latest review:
Robert Biegala has done laminate flooring, decorating and other tasks in my office in Farringdon. It was pleasure to work with Robert as he is a reliable, responsible and trustworthy person. His communication was consistent and reassuring. Robert is proactive and finds solution to any problems which arise during works. I would highly recommend his services.
IDL Contractors Ltd
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
I am in the building industry for more than 20 years, nevertheless, my company was registered in 2017. Our team is specialized in doing extensions, house conversions and refurbishments.
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Latest review:
I can't recommend IDL highly enough, Lubo and his team were efficient, on time and completed the work quickly with no fuss, plus they gave us a payment plan and time frame that suited us. Our garage conversion has transformed our house, it feels so open and light, thanks Lubo xx
Garey Limited
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
General building
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Latest review:
Very reliable and high quality of work.
GRAND DESIGNS INTERNATIONAL LTD
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
Grand Designs International (GD) | Architectural, Engineering & Construction Services At Grand Designs International (GD), we are dedicated to delivering high-quality architectural, engineering, and construction services tailored to meet our clients’ unique needs. Backed by over 20 years of expertise, our team specializes in transforming visions into reality—whether you're planning a new build, home extension, loft conversion, or full-scale renovation. With a strong foundation in innovation, sustainability, and precision, we provide end-to-end project solutions, from initial design and planning permissions to structural calculations and final construction. Our commitment to quality, efficiency, and client satisfaction ensures that every project is completed to the highest standards. Why Choose Grand Designs International? ✅ Full-Service Expertise – From architectural planning to construction, we handle every stage seamlessly. ✅ Planning & Building Regulations Specialists – We navigate approvals efficiently to prevent delays. ✅ Experienced & Certified Team – Qualified engineers, architects, and builders with a proven track record. ✅ Tailored Solutions – Every project is custom-designed to meet your style, space, and budget needs. ✅ Transparent Pricing & Project Management – No hidden costs, just reliable service with regular updates. ✅ Fast Turnaround & On-Time Delivery – We work efficiently without compromising quality. Our Services 🏡 Architectural & Planning Services Planning Applications & Building Regulations Approval Concept & Detailed Design Interior Design & Space Planning 3D Visualizations & Rendering Enforcement & Retrospective Planning 🏗️ Structural & Engineering Design Structural Calculations & Drawings Civil & Structural Engineering Services Quantity Estimation & Cost Planning 🔨 Construction & Building Services Home Extensions & Rear Extensions Dormer Loft Conversions & Flat Conversions New Build Homes & Full Renovations Project Management & Site Supervision Construction Planning, Procurement & Logistics Quality Control & Safety Management At Grand Designs International, we believe in delivering excellence, one project at a time. Our reputation for integrity, professionalism, and top-tier craftsmanship makes us the preferred choice for homeowners and businesses across London and beyond. 📞 Get in Touch Today! Let’s discuss your project and bring your dream home to life.
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Latest review:
★★★★★ Highly Recommended! I had an existing 3-bedroom rundown property and contacted multiple builders before meeting Director Mr. Q Nawaz. From our first meeting, I was impressed by his ideas and the fact that Grand Designs could provide all services in-house. Initially, I proceeded only with the planning application to see if what he promised was possible—and YES, he delivered! My application was approved as he assured me. Seeing this success, I entrusted them with the entire construction project, and Grand Designs completed it within just 6 months, despite the challenges of COVID-19. Not only did they build my project, but they also added significant value to the development. I’m proud to have worked with them, and their exceptional work on my St Albans development is now featured in their portfolio. Within one year, the value of my property increased by £500,000—a testament to their expertise! Extremely professional, highly skilled, and very reasonably priced. You don’t need to go anywhere else—Grand Designs is the complete package!
Joe Does Everything
Rating: 5 out of 5
Loft Conversion Company in Knightsbridge
Joe Does Everything is a professional large-scale building and contracting company. We specialize in everything from loft conversions to refurbishments and extensions. Our experienced and diverse workforce is ready to take on any task, no job is too large. We prioritize client interaction, getting your dream job done as simple for you as possible. Services: Extensions, Loft Conversion, General Building, Full refurbishments, Renovations, Conversations, Bathroom, Roofing, Scaffolding.
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Latest review:
Handyman- 24 Dec 2021
Joe is wonderful in assembling the furniture, he is quick and neat in his work. Does the work in reasonable prices. All in all good experience with him and definitely recommended..

4.5

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Knightsbridge, are rated 4.5 out of 5 based on 13 reviews from customers like you.

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What services are offered by loft conversion companies in Knightsbridge?

Converting a loft often entails many jobs - some of which you likely haven’t even considered! Fortunately, a professional loft conversion company in Knightsbridge 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 Knightsbridge 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 Knightsbridge

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 Knightsbridge loft conversion company.

Find a loft conversion company in Knightsbridge 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 Knightsbridge.

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 Knightsbridge can view your job and register their interest.

Step 2: Review and compare Knightsbridge 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 Knightsbridge 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 Knightsbridge 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 Knightsbridge

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 Knightsbridge?

A local loft conversion company in Knightsbridge 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 Knightsbridge 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 Knightsbridge 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 Knightsbridge

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 Knightsbridge before agreeing to start the work.

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

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 Knightsbridge 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 Knightsbridge loft conversion companies offer strategies to minimise disruption, but in complex projects, temporary relocation may be advisable.