Loft conversion companies in Welwyn

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 5 (2 reviews)

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

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 Welwyn

819 Results

Sort by:

Zen Construction
No reviews yet
Loft Conversion Company in Welwyn
I’ve been working in the construction and property improvement industry for over 12 years, gaining hands-on experience across a range of jobs from full house renovations to smaller repair and maintenance projects. I’m based in London and cover surrounding areas. I specialise in Demolition, Carpentry, Bricklaying, Laminate Flooring, Extensions, Driveways, with a strong eye for detail, reliable workmanship, and a focus on delivering high-quality results. I take pride in being honest, hardworking, and easy to communicate with—clients know they can trust me to get the job done right the first time. If you’re looking for someone dependable, skilled, and committed to quality, I’m ready to help.
Get in touch
Badesha builder ltd
Rating: 1 out of 5
Loft Conversion Company in Welwyn
I am running a company badeshabuilder ltd. I have hard worker people working for me, whose have 12 year experience in builder work. We doing all extensions, bathrooms, kitchen, loft and all kind of building work. Please take a look of photos of previous work. Thanks for reading.
Get in touch
Latest review:
Plastering- 18 Mar 2021
Guy came down to quote and I've subsequently text him as to when he can start and 2 days no answer. Gave the job to someone else. Not professional at all!!!
VCNY GROUP LIMITED
No reviews yet
Loft Conversion Company in Welwyn
We are a dedicated team of experienced, field-based professionals with diverse backgrounds in Health and Safety, Engineering, Project Management and Environmental Sustainability. Our combined expertise allows us to deliver integrated building solutions covering essential services, ensuring each client’s project operates smoothly, efficiently, on schedule and always in compliance with the highest industry standards. At VCNY Group Limited, we pride ourselves on turning ambitious visions into reality by blending innovation with practical, reliable execution. Established on unwavering principles of integrity, creativity and excellence. Our company has earned a leading reputation across the construction and civil engineering sectors. In addition to exceptional building services, we provide expert consultancy to guide clients through complex projects with confidence. From initial concepts to project completion, we remain committed to quality, sustainability and client satisfaction, setting the benchmark for superior results in every endeavour.
Get in touch
E&K Carpentry Ltd
Rating: 5 out of 5
Loft Conversion Company in Welwyn
All of joinery works, loft conversion, refurbishment. House extension. Kitchen's.
Get in touch
Latest review:
Loft Conversion- 26 Apr 2023
We've recently completed our loft conversion/dormer with E&K Carpentry. The work has been to a very high standard, kept to the schedule promised and completed on budget. My wife and I have been so impressed with Eivinas, he's kept us up to date on each stage of the build, sending photos daily on our group Whatsapp. We've benefitted from some really great suggestions which have improved the living space. Compared to previous work we've had done, this has been free of any complication. Eivinas has excellent project management skills and has always been one step ahead of the build. The builders have been courteous throughout the build, keeping the site clean and always ensuring they impact us as little as possible I would strongly recommend E&K Carpentry for any building work
CPR (Complete Property Renovations)
No reviews yet
Loft Conversion Company in Welwyn
CPR (Complete Property Renovations) is a professional property renovation company specializing in complete renovation solutions for residential and commercial properties. We deliver high-quality workmanship across every stage of the renovation process, from initial demolition and structural alterations to the final finishing touches. Our services include kitchen and bathroom renovations, flooring installation, painting and decorating, electrical and plumbing works, interior refurbishment, and complete property fit-outs. Whether you’re renovating a house, apartment, office, or retail space, we are committed to delivering reliable, efficient, and high-quality results tailored to your needs.
Get in touch
Visionary Design & Build Ltd
No reviews yet
Loft Conversion Company in Welwyn
Visionary Design and Build is a leading design and construction firm based in London, UK, renowned for its innovative approach and commitment to excellence. Specializing in both design and construction services, Visionary offers comprehensive solutions for residential, commercial, and industrial projects. With a team of talented architects, designers, engineers, and craftsmen, Visionary brings creative vision and technical expertise to every project. They work closely with clients to understand their unique needs, preferences, and budget constraints, ensuring that each design reflects their vision while maximizing functionality and sustainability. From concept development and planning to construction management and project completion, Visionary Design and Build oversees every aspect of the building process with meticulous attention to detail and uncompromising quality. Their dedication to delivering exceptional results has earned them a reputation as one of London's most trusted design and build companies, consistently exceeding expectations and transforming visions into reality.
Get in touch
House of bricoleurs LLP
No reviews yet
Loft Conversion Company in Welwyn
Thanks to our combined expertise in heritage and digital making, we champion creative reuse by transforming existing buildings. Looking back to pre-fossil constructions, we respond to climate change by using natural materials and developing unique material, structural and adaptive reuse design methods. We explore sustainable methods of construction to support collective projects that drive change. We value local communities and know-hows with our hands-on approach to construction, often alongside self-builders. We expand the architect’s role, by reclaiming a technical understanding of buildings’ life cycle with retrofit expertise and presence on site during construction. Current projects range from the urban to the rural: from retrofitting a city flat to transforming a pig farm into a cultural venue.
Get in touch
Ed’s loft conversions Ltd
Rating: 5 out of 5
Loft Conversion Company in Welwyn
We specialise in loft conversions, Extension to a complete house refurbishment.
Get in touch
Latest review:
I engaged Edi to work on a full renovation and refurbishment of a 4 bedroom detached house with front and back gardens on Blackheath’s Cator Estate. Edi did an extensive amount of work, including stripping out; plumbing; plastering; windows installation; carpentry; and decoration. In addition, after commencing the property work, once the scaffold had been erected, following sensible advice, Edi and his team replaced the roof and fully insulated the attic; fitted additional electric points; rebuilt the garden patio; and replaced the flooring throughout, in addition to other important jobs including re rendering and pointing of chimneys, building new wardrobes in the main bedrooms; and upgrading the radiators. A new kitchen, and two new bathrooms have been fitted. The kitchen redesign meant knocking through a wall with the lounge to create a larger space. Edi is a highly skilled craftsman, who thinks creatively as he works to make best use of the space, including shelf fittings, and additional lighting for example. He has built some beautiful wardrobes, and the internal decorations have brightened up what was previously a rather shabby looking house. In addition to the above, I wish to commend Edi for his professionalism, courtesy, and passion for doing the best work possible. On all the site visits I attended, and every time I spoke with him on the phone, it was striking how much he cared about the work that he was doing, his desire to ensure that the house would look the best. I always left site visits with the feeling that he cared so much about the house that he could be safely relied on to give the best advice to enable us to make the right decisions. I also noticed that Edi and his team would take the upmost care to keep the property safe, tidy and in good shape throughout the project. He can be fully trusted to look after any site he works on. He is intelligent and careful when it comes to safety and security. It has been a pleasure for Edi and his team to work with us over a period of around 6 months, and he did so much to reduce the stress of a significant project so that we could always rely on him to work methodically, patiently and sensibly, and to make best use of the resources available. His pleasantness shines through, and everyone I know who has spoken to him has always provided me with the most positive feedback I have no hesitation in recommending Edi to anyone who wishes to engage him for future projects, and is most deserving of the good words that I and others that work with him have to say about him.
House2Home
Rating: 5 out of 5
Loft Conversion Company in Welwyn
House to Home Atelier is a local building company based in Abbey Wood, South East London. We specialise in end-to-end home renovations and construction, from initial design and planning to final finishes. Our team delivers loft conversions, house extensions, full refurbishments, bathrooms, kitchens, and bespoke interior solutions, always with a focus on quality, efficiency, and maximising space. We combine traditional craftsmanship with modern solutions, ensuring every project is completed on time, on budget, and to the highest standards. With our experience and carefully selected team of skilled tradespeople, we take care of everything from structural work and plumbing to carpentry, plastering, and finishing touches. We are local, accountable, and hands-on, so you always know who is managing your project. Your home is your investment, and we treat it as our own. Whether it’s a small repair or a full-scale renovation, we deliver solutions that maximise space, enhance character, and provide lasting quality.
Get in touch
Latest review:
Works consisted of hip to gable loft conversion under permitted development and a refurbishment of the first floor of a semi-detached house into a four bedroom/bathroom layout, including new windows, balconies, wiring and plumbing as well as sound proofing the walls. With 100m2 of works this was my first introduction to a major building project and I was worried by the horror stories I have heard about builders. From the outset Monika set my mind at rest, listening to what I wanted, making helpful suggestions, offering tips for instance on how to save on the scaffolding and always asking me when choices needed to be made. She took the trouble to ensure that I knew what was happening, with daily photos of progress without the need for me to climb scaffolding. I was working to a tight timescale and budget, which Monika understood, and even having accommodated a number of changes including some additions, the project came in on time and on budget. All of the workers on the site were very professional and the quality of the work and the attention to detail was exceptional. I have no hesitation in recommending Monika and her team - I went into this project apprehensive and not sure what to expect; thanks to Monika, I came out the other side delighted by and looking forward to working with her and her team again to renovate my ground floor.
T.E.T Construction LTD
No reviews yet
Loft Conversion Company in Welwyn
We are the team of professionals that can turn your house into a dream. Quick, reliable and accurate work.
Get in touch
DESIGN SEED DEVELOPMENTS LIMITED
No reviews yet
Loft Conversion Company in Welwyn
We have over 100 years of combined building experience we set up our business to stream line for our clients as we were constantly being let down by tradesman we merged 3 companies together combining heating, gas safe NiC electrical works and all building and brick laying so there is no reason for delays in a project at any given time
Get in touch
TT Property Services
No reviews yet
Loft Conversion Company in Welwyn
I've been in the business for 10+ years. I have done a number of large projects including extensions, conversions, kitchen fitting, bathroom fitting and painting and decorating. We do take one smaller jobs, and have a vast range of skills and trades.
Get in touch
SSB Building Services Ltd
Rating: 5 out of 5
Loft Conversion Company in Welwyn
Hi. My name is Sylvester and I would like to introduce to you SSB Building Services Ltd. We have over 15 years experience specialising in all aspects of general building services including extensions, loft conversions, kitchen and bathroom fittings, carpentry, restoration and refurbishment, decorating and many more.
Get in touch
Latest review:
Kitchen Fitting- 11 Nov 2019
A fantastic job. I am very pleased with the new worktop and my kitchen was left clean and tidy. I would highly recommend this builder. Lindsey (Northampton).
PRIMEBUILD&DESIGN LTD
New on MyBuilder
Loft Conversion Company in Welwyn
PRIMEBUILD&DESIGN LTD is a professional building company focused on delivering high-quality home extensions, renovations and general building work. We take pride in reliable workmanship, clear communication and keeping every project organised from start to finish. We work closely with our customers to understand exactly what they want and provide practical solutions throughout the project. We aim to keep sites clean and tidy, respect our customers’ homes and complete work to a high standard. Whether you are planning an extension, structural alterations, refurbishment or other building improvements, PRIMEBUILD&DESIGN LTD is committed to providing a professional and dependable service. We are happy to discuss your project, answer questions and provide a clear quotation before work begins.
Get in touch
AKAM BUILDERS LIMITED
Rating: 5 out of 5
Loft Conversion Company in Welwyn
Akam Builders have over ten years experience in providing cost effective solutions for domestic & commercial building requirements be it simply refreshing an old bathroom to building a nursing home. We have a hard working team ready to help you transform your house into your dream home.
Get in touch
Latest review:
I had a commercial property converted into 2 one bedroom flats. Akam builders did an A-class job. The work was done to a very high standard and within the time scale stated by Gurwinder. I was impressed by the extra work he did without any extra charge. This builder is a genuine and reliable builder. The work is in perfect condition after 6 months.
Rose gold property developers LTD
New on MyBuilder
Loft Conversion Company in Welwyn
Rose gold property developers specialise in residential property refurbishments and extensions including plumbing carpentry bathrooms kitchens we cover all aspects of a residential home all our work is done with pride and joy as if we doing work on our own home our passion is to provide outstanding high quality work to all our clients as we are in the business for a good reputation and want our company to be recommended to other clients and always finish all our jobs of to the highest possible standards whilst been affordable
Get in touch

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Welwyn, are rated 5 out of 5 based on 2 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 Welwyn?

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

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 Welwyn loft conversion company.

Find a loft conversion company in Welwyn 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 Welwyn.

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 Welwyn can view your job and register their interest.

Step 2: Review and compare Welwyn 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 Welwyn 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 Welwyn 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 Welwyn

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 Welwyn?

A local loft conversion company in Welwyn 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 Welwyn 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 Welwyn 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 Welwyn

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 Welwyn before agreeing to start the work.

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

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