Loft Conversion Companies in Windsor

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 4.3 (6 reviews)

Easily find verified Windsor Loft Conversion Companies. Just post your job to get quotes from MyBuilder's Loft Conversion Companies in Windsor.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated loft conversion companies in Windsor

881 Results

Sort by:

Darktolight
Rating: 4.5 out of 5
Loft Conversion Company in Windsor
WELCOME to DARK 2 LIGHT CONSTRUCTION LTD. We are team of builders and electricians and all the trades . Our website is available to get more information ! Our team is made up of qualified, trusted and experienced workers . No job is too small or too big, we offer a big range of services . Call now to get a free quote !
Get in touch
Latest review:
Restoration & Refurbishment- 4 Jan 2026
At the outset, Harry and his partner are good people. However, the job was not completed to a professional standard. Grout has started coming off from between the tiles leaving gaps that water can pass through, the door hinge was not properly fitted leaving a door that will not close, the radiator pipe clips were not fitted, tile trims are not flush with rest of the wall, shelves were fitted on top of old broken wood. And the worst part is that Harry did not turn up even after confirming a date to come back and fix the missing parts. I paid him extra for all the additional jobs, even though certain items from the contract were not done ( for e.g. replacing the bathtub panel ). They have multiple jobs ongoing at the same time and struggles to stick to schedule. If you get them I would advise not paying everything upfront and making sure contract is signed only after it is made sure that they would stick to schedule. I struggled to get them to commit to a date and stick to it.
Np & co
Rating: 4.9 out of 5
Loft Conversion Company in Windsor
We are Np & co builders LTD, a professional construction business based in West London. We undertake all types of building work and specialise in loft conversions, all types of extensions, fencing, driveways, bathrooms and much more. Our builders have over 10 years of experience within this field of work and always aim to provide the best for our customers. We are extremely passionate about any work we provide and always retain high quality. We offer free quotations.
Get in touch
Latest review:
Fencing- 16 May 2025
Amazing, Top Guys
FALCONS CONSTRUCTION LTD
Rating: 5 out of 5
Loft Conversion Company in Windsor
Falcons Construction is privately owned business that has started from small beginnings to that of an Innovative, Reliable and Flexible Contractor. We always offers a Professional and Efficient service. Our aim is Client satisfaction, Quality work with in the budget. We always respond promptly.
Get in touch
Latest review:
Extensions- 6 Jun 2020
Very pleased. Bilal is very knowledgeable, helpful and punctual. The job was completed quickly and efficiently. The area was cleaned and left in a acceptable state. Will definitely use this company again. Thanks
CDG Carpenrty
Rating: 5 out of 5
Loft Conversion Company in Windsor
Here at cg project we take on all jobs small or big! Been in the building game for 15years and can turn our hands to any trades. Have a good strong and reliable team behind us to ensure we get the best quality work! Competitive pricing and always try to work within people’s budgets. All jobs are finished to a high standard as we take great pride in our work to ensure above every thing else we have happy customers.
Get in touch
Latest review:
Carpentry- 16 Sep 2024
Connor gave a competitive price for the job and was willing to work with our budget. The level of workmanship was very high, Connor assessed and carried out the job to a very high standard and very quickly (even though we were on a day rate) communication was great throughout, polite and friendly and the guys cleared up well after the job. Would highly recommend for any carpentry work.
Kotson Construction Limited
Rating: 5 out of 5
Loft Conversion Company in Windsor
Hi we cover all aspects of property no job is too small or big for us. We are reliable , trustworthy and hard working.Our success is built on providing the best services and ensuring that all our customers are happy with our services Thanks Jagdeep
Get in touch
Latest review:
Hard Flooring- 20 Nov 2025
Job was completed in a timely manner. No issues, reasonably priced Would recommend to others
KG Home Improvement
Rating: 5 out of 5
Loft Conversion Company in Windsor
Hello and welcome to KG Home Improvement. We are a family run business based in Egham. -We love and take pride in our work and have been producing some quality finishes for our costumers. -We undertake all sorts of work level and Always offer competitive prices.
Get in touch
Latest review:
Painting & Decorating- 13 Sep 2021
Geno and his team did a fantastic job painting the exterior of my house. The property has lots of nooks and crannies and was not straightforward. The team went above and beyond what was required . They were very clean and tidy workers throughout the project My house looks amazing now and I have had lots of good comments from my neighbours and a couple have asked for KG Home Improvements contact details
Paramount Build Group Ltd
Rating: 5 out of 5
Loft Conversion Company in Windsor
At Paramount Build Group Ltd, we are proud to be a leading force in the UK construction industry. Based in London and the South East, our reach extends across the nation, delivering exceptional results on projects of all scales. From large-scale residential developments to high-end commercial spaces—including hotels, gyms, and spa facilities—we bring vision to life with precision, reliability, and unmatched expertise.
Get in touch
Latest review:
Great communication through every stage of the build process, offering great advice along the way.
Roberts Toprins
Rating: 4.8 out of 5
Loft Conversion Company in Windsor
Hello! We specialise in carpentry bespoke furniture and general building services. Our team of skilled professionals is dedicated to delivering exceptional results that exceed our clients' expectations. In addition to our expertise in carpentry and general construction and renovation services, we also offer a unique service of providing free visualizations and drawings for our clients, giving them the confidence and peace of mind that they are making the right choices.
Get in touch
Latest review:
Painting & Decorating- 20 Sep 2021
Robert arrived on time and completed the work promptly , painted 2 rooms as agreed. Excellent service . Highly Recommended!
JM Carpentry & Construction
Rating: 5 out of 5
Loft Conversion Company in Windsor
At JM carpentry and construction We've had over 25 years experience in the trade doing new builds from 1st fix to 2nd fix. we cover carpentry, joinery, extensions, new builds, loft / garage conversions, kitchens, bathrooms and fitted wardrobes
Get in touch
Latest review:
Conversions - General- 9 May 2026
Very pleased with the work ,it was done very professionally and to a high standard. Very good team of friendly guys. Highly recomend
Prime Design and Build Services LTD
Rating: 5 out of 5
Loft Conversion Company in Windsor
Over 20 years experience in this industry. We understand it is not easy to find a good builder and that customers have saved and dreamt of having their dream house. We endeavour to meet all your requirements with exceptional standards. All aspects of building work undertaken - extensions, refurbishments, bathrooms, kitchens. Gas Safe and NICEIC certified engineers. New to MyBuilder hence why we have no reviews at the moment. However we can put you in touch with our previous clients for feedback
Get in touch
Latest review:
Kitchen Fitting- 7 Mar 2020
From the get go, Raj and his team were a pleasure to deal with and have working in our home. The quoting and design stage was clear and efficient, and he recommended some great features for our kitchen build. They recommended we get our kitchen from Howdens and we are very impressed with the quality. We had the entire kitchen - floor to ceiling worked on, so new lighting layout and flooring as well. The work started on time and Raj and his team broke down everything that had was carried out each day and when certain processes were about to happen. They done a fantastic job fitting it all, it looks really nice and you can tell they take pride in their work due to their attention to detail. I highly recommend them and they will be my first choice for any other work I need carried out in the future.
Sherif Celaj
Rating: 5 out of 5
Loft Conversion Company in Windsor
Hi, I’m Sherif, a professional builder with over 25 years of hands-on experience in residential construction, renovation, and general building projects. Throughout my career, I’ve built a solid reputation for quality craftsmanship, reliability, and attention to detail. From complete home builds to complex renovation projects, I take pride in turning ideas into lasting, well-crafted results. I’m passionate about creating safe, durable, and beautiful living spaces that meet my clients’ needs and stand the test of time. My experience covers every stage of construction — from planning and site preparation to finishing and inspection — always with a focus on efficiency and precision. Whether working independently or leading a team, I believe in clear communication, strong work ethics, and a commitment to excellence on every project. If you’re looking for a builder who values integrity, skill, and results, I’d be happy to connect and discuss how I can help bring your vision to life.
Get in touch
Latest review:
Restoration & Refurbishment- 10 Dec 2025
Sherif is amazing He communicates regularly during the Job and takes initiative. There were additional works he carried out for us after inspecting and seeing a need . he is kind also even when you make changes to the schedule and goes above and beyond Looking forward to working with him again
SJD BUILD LTD
Rating: 5 out of 5
Loft Conversion Company in Windsor
Full House Renovations , Kitchen , Bathrooms , Driveways , Extensions, Loft Conversions ,
Get in touch
Latest review:
Exceptional Home Building Experience Rating: ⭐⭐⭐⭐⭐ (5/5 stars) I recently had the pleasure of working with Jarmaljit Singh to build my dream home, and I cannot express enough how thrilled I am with the entire experience. From start to finish, every aspect of the process was handled with the utmost professionalism and attention to detail. Communication: ⭐⭐⭐⭐⭐ (5/5 stars) Jarmaljit Singh and the entire team were excellent communicators throughout the entire project. They kept me informed at every stage, promptly addressed any concerns or questions I had, and ensured that I felt involved in the decision-making process. Quality of Work: ⭐⭐⭐⭐⭐ (5/5 stars) The craftsmanship and quality of workmanship displayed by Jarmaljit Singh exceeded my expectations. The attention to detail is evident in every corner of my new home. The materials used are of the highest quality, and the construction is solid and well-executed. Timeliness: ⭐⭐⭐⭐⭐ (5/5 stars) Jarmaljit Singh adhered to the agreed-upon timeline, completing the project on schedule without compromising the quality of the work. This level of reliability was greatly appreciated, and it made the entire process stress-free. Customer Service: ⭐⭐⭐⭐⭐ (5/5 stars) The customer service provided by Jarmaljit Singh was exceptional. They went above and beyond to ensure my satisfaction, addressing any concerns promptly and with a genuine commitment to making sure I was happy with the end result. Overall Experience: ⭐⭐⭐⭐⭐ (5/5 stars) Building a home can be a daunting process, but thanks to Jarmaljit Singh, it was a smooth and enjoyable experience. I am now the proud owner of a beautifully crafted home that meets and exceeds all my expectations. I highly recommend Jarmaljit Singh to anyone looking for a reliable, skilled, and customer-focused home builder. Thank you for turning my vision into a reality!
Sky roofing and building services
Rating: 3.8 out of 5
Loft Conversion Company in Windsor
Hi I have 8 year experience in roof work,extensions and loft conversion We do all types of roof work. Flat roof, grp fibreglass, tile roof , slate roof and carpenters.
Get in touch
Latest review:
Roofing (Flat)- 2 Aug 2023
Stay clear of this person as he is not experienced builder and do not fulfill his commitments after taking money. Don't hire this tradesman unless you want someone not to turn up on agreed date and time or you want to chase him again and again without him picking up your phone calls or answering them.. My garden shed was leaking from the side. Amarjeet recommended to put new flashing on the garden shed roof to fix it. However, after putting flashing, the garden shed continued to leak from the same area he had put the flashing. He said this time the cause of leak were the joints which he failed to look into earlier. So, he fixed that. After second fix, the shed again leaked, this time directly under the flashing he had put. When I asked him to fix it, he refused saying that the issue is with the joints and not the flashing. I told him that I had hired him to fix the water leak and not the flashing or joints. I even said that I will pay him if the issue is different. After ringing him several times and then agreeing a date and time with him, he didn't turn up. He is not a professional or experienced builder. Having now spoken to another builder, they suggested that the issue is that the water is somehow going under the flashing he had put. There is a bigger problem of the water standing on the roof which needs to be fixed first and which this builder failed to notice. Unfortunately, I will have to pay another builder to complete his work!
SST Homes LTD
Rating: 3 out of 5
Loft Conversion Company in Windsor
Here at SST Homes, we have been providing building services for over 15 years. We take great pride in carrying out all types of building works including New builds, Renovations, Extensions, Loft conversion, Commercial projects, Maintenance contracts and Smart Homes.
Get in touch
Latest review:
Extensions- 13 Nov 2020
Avoid these traders. They are amateurs and have caused me no end of pain with a small single storey front extension. I sacked them in the end as we just could tale anymore of their slap dash approach.
Pro build Surrey
Rating: 5 out of 5
Loft Conversion Company in Windsor
Our company have more then 26 years experience in all types of houses refurbishment. Undertaking internal decoration, bathroom and kitchen refurbishment, carpentry work, extension and loft conversion.
Get in touch
Latest review:
Handyman- 25 May 2024
Sebastian is punctual. He assembled a shed in our back garden. It's not perfect but I'm overall satisfied with his work. My hubby is happy he's got a studio for painting.
Lnb building solutions ltd
Rating: 5 out of 5
Loft Conversion Company in Windsor
We are specialise in all types of new builds from large extensions to loft conversions or building a new house with complete planning services with structure drawings and designing interior as well.We are members of federation of Masters Builders. First time buyers with limited funds to decorate and refurbish to give new and bright look with new double glazing and roofing. Every small job is treated like a big job. Thanks in advance for giving us opportunity to fulfill your future home project.
Get in touch
Latest review:
Loft Conversion- 18 Mar 2023
Lokesh / LNB Building completed my loft + Dormer + en-suite bathroom . Amazingly the work started in late Dec 2022 ( scaffolding) and completed yesterday( Building cert received ). The overall experience and result was in nothing short of impressive . Lokesh and his team completed the loft and bathroom to a high spec and work consistently , mainly focused on finishing, detail, and safety aspects of the Contruction/renovation . They have always been available for consultations to go through any concerns or issues. LNB’s recommendations for fitted wardrobes, windows , Bathroom supplies etc were extremely helpful.

4.3

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Windsor, are rated 4.3 out of 5 based on 6 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

What services are offered by loft conversion companies in Windsor?

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

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 Windsor loft conversion company.

Find a loft conversion company in Windsor 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 Windsor.

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 Windsor can view your job and register their interest.

Step 2: Review and compare Windsor 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 Windsor 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 Windsor 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 Windsor

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 Windsor?

A local loft conversion company in Windsor 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 Windsor 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 Windsor 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 Windsor

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 Windsor before agreeing to start the work.

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

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