Loft Conversion Companies in Walthamstow

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 4.6 (9 reviews)

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Some of our top rated loft conversion companies in Walthamstow

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SM Builder Expert ltd
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
At SM Builder Expert Ltd the core value is customer satisfaction. SM Builder Expert ltd provides solutions for your construction needs; including building extensions, loft conversions, New build, rebuilding and refurbishing, internal alterations, painting and decorating, as well as garden and patio works. We have a very good track of previous completed jobs, with necessary recommendations and contacts at request.
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Latest review:
Bathroom Fitting- 29 Sep 2020
Sergiu and his colleagues did a great job refurbishing our bathroom. Always punctual, clear with costs and extras and delivering great work overall. We can definitely recommend them!
Carnot Construction Limited
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Carnot Construction are committed to ensuring our clients are satisfied from beginning to end, we aim to take the stress out of building work and complete all projects as swiftly and cleanly as possible. We ensure our clients are in safe hands with strict contracts in place to protect both parties. We specialise in Extensions, New builds, Loft Conversions, General Conversions, Kitchen and bathroom renovation/fitting.
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Latest review:
Extensions- 15 Aug 2018
100% RECOMMENDED Michelle and her partner measured up and competitively quoted within a short space of time. She was then very patient and supportive when unforeseen planning issues popped up and set the start date back by quite some time. Once building started, all questions were promptly answered by either the site manager or Michelle, both being available at all times. I was away for the duration of most of the job and it was very reassuring to know that I was leaving it all in capable and honest hands. The workers were very proficient and tidied up after themselves at end of each day. They also put in some very long hours at times to hasten the work. I was also impressed by the handling of unexpected problems during the building (mainly invasive tree stumps!). I am absolutely thrilled with the end result. High quality workmanship and a beautiful building which I am sure will last many years. I would certainly recommend them without a doubt.
Kulwant Singh
Rating: 4.8 out of 5
Loft Conversion Company in Walthamstow
I do nice and clean job try me I make sure you will be happy
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Latest review:
Bathroom Fitting- 27 Aug 2025
Very happy with work completed. Fan was installed and done for a reasonable price. Would definitely recommend
PP Company
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
My name is Przemek. I'm working in the construction branch for 20years. EXPERIENCE: *LOFT CONVERSIONS, *RENOVATIONS, *EXTENSIONS, *PLUMBING & HEATING SYSTEMS, *REWIRING & ELECTRICAL SYSTEMS, *FITTING KITCHEN & BATHROOMS, *TILING, *PAINTING & DECORATING, *PLUMBING & ELECTRICAL CERTIFICATE.
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Latest review:
Decking- 29 May 2020
Started on time and completed the decking extension & renovation to a high standard. Ensured that small details like cuts around poles etc, were finished properly and not left with gaps. Next time I would confirm that clearing rubbish is part of the quote, but highly recommend Przemek for quality finish.
OAKSBUILD LIMITED
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Team of honest and reliable builders available for all your property needs and requirements. We cover all building aspects and pride ourselves making our clients journey as simple as possible
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Latest review:
Conversions - General- 12 Oct 2024
Andrei did a great job, knocking through the internal wall and laying new floorboards, while keeping us updated about building regulation requirements as the job spec changed a few times. Excellent communication. Would highly recommend.
Gamfi Construct
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
https://gamficonstruct.carrd.co/ Experienced contractor based in London, offering Loft Conversion and House Extension, Demolition and strip‑out works, full property renovations, painting & decorating, landscaping, gardening and Professional cleaning services. We work with both private and commercial clients and can collaborate with architects when required. Registered CIS subcontractor with full Public Liability Insurance and a commitment to fair, transparent pricing.
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Latest review:
Gamfi Construct delivered excellent interior decoration work for my 3‑bedroom home. The team was punctual, clean, and delivered a high‑quality modern finish. I highly recommend their services.
Abi Building Services
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
ABOUT ABS ABI BUILDING SERVICES ABS Abi Building Services is a trusted London-based building and renovation company specialising in high-quality residential construction and refurbishment projects. With a skilled and reliable team of experienced tradesmen, we deliver professional building solutions tailored to each client’s needs, budget, and vision. We work closely with homeowners, landlords, designers, and property developers to ensure every project is completed to a high standard with excellent attention to detail. At ABS, we focus heavily on: • Quality workmanship • Honest and clear communication • Reliability and professionalism • Clean and organised work environments • Strong client relationships • Delivering projects on time and within budget Our services include: • Full House & Flat Refurbishments • Extensions • Loft Conversions • Bathroom Renovations • Kitchen Installations • Structural Alterations • Plumbing & Heating • Electrical Works • Plastering & Rendering • Silicone Rendering Systems • Carpentry & Joinery • Flooring & Tiling • Painting & Decorating • Roofing & External Works • General Building Services Whether it’s a full property renovation or smaller improvement works, ABS Abi Building Services is committed to delivering a smooth, professional service and high-quality finish from start to completion. Based in London | Fully Insured | Residential Specialists Whttps://abibuildingservices.co.u
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Latest review:
Bathroom Fitting- 7 May 2026
Very happy with the new bathroom. Florent removed the old one, disposed of the waste and installed a walking shower wet room, a new toilet, a new sink and a vanity unit. The work was professional and completed to a high standard in good time; the quote was reasonable and the communication was very good. Happy customer!
Frameworks Construction
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Hi, I am a city and guilds qualified carpenter experienced in both 1st and 2nd fix carpentry. I subcontract for larger companies doing refurb, conversion and extension work, and take on smaller jobs for private individuals for things like doors and mouldings etc. Every job is important to me, small or large, and I take great pride in my work. I deliver fairly priced and professional results to suit each customer's needs.
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Latest review:
Carpentry- 17 Dec 2021
Joe was great - very friendly, professional, flexible and did a great job cutting and installing skirting in a tricky bedroom - would definitely use again.
B.CANI Limited
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Reliable, fully insured construction company delivering high-quality workmanship across residential and commercial projects. We cover all aspects of construction including extensions, renovations, loft conversions, kitchens, bathrooms, roofing, landscaping and full refurbishments. From design to completion, we manage every stage with clear communication, fair pricing and attention to detail. Customer satisfaction, safety and deadlines are our priority.
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Latest review:
Extensions- 11 Jan 2018
This was our first project, and we were exceptionally fortunate to find Bujar. We're actually getting tired of hearing our family and friends tell us how lucky we are and how amazing he sounds. One of the most honest, trustworthy, and genuine people I've ever met. If I had a problem, he'd be one of the first people I'd call! In fact I did last week and he came to the rescue :) His team were all friendly, polite, conscientious and very tidy. They worked around us as much as they could, always making sure we had access to what we needed which sometimes meant it took them longer to work. Bujar is a perfectionist and is so proud of what he does, he made sure everything was done to a high standard - the estate agent who came round after we were done was impressed! His prices are very fair (better value than other quotes we got and much less time). We couldn't believe it was done in the 3 months he said it would take, and we managed to fit in a few extra bits and pieces after that. He was so helpful throughout, took all project management on and didn't bother us unless an important decision needed to be made. He drove us around all over the place to sort kitchens, bathrooms, etc. and gave us really helpful advice throughout the process. Highly recommend him and his team. I can't imagine ever wanting to look for another builder unless I had to - something that is quite common amongst Bujar's clients. We are extremely pleased with everything about our new house.
Sunshine design & build ltd
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Sunshine Design & Build Ltd “Turning your vision into reality” We are a London-based construction company specializing in: • Full home renovations • Bathroom installations and tiling • Extensions and structural work • Plumbing, kitchen,electrical, and roofing services
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Latest review:
Bathroom Fitting- 8 Jan 2026
We couldn’t be happier with the bathroom and toilet refurbishment carried out by Sahir. From start to finish, the workmanship was outstanding and the attention to detail really shows in the final result. The spaces have been completely transformed and finished to a very high standard. Sahir was professional, reliable, and respectful of our home throughout the project, always keeping the area clean and tidy. Communication was clear and honest, and everything was completed on time. We’re absolutely delighted with the results and would highly recommend them to anyone looking for high-quality refurbishment work. A truly excellent job!
JH CITY PROPERTY CONSTRUCTION
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
JH City Property is a London-based renovation company delivering high-quality residential and commercial projects. With over 18 years of experience, we specialise in full property refurbishments, including painting and decoration, flooring, kitchens, bathrooms, roofing, and structural works. All projects are carried out by our in-house team, ensuring consistency, reliability, and attention to detail from start to finish. We focus on practical design, durable finishes, and delivering work to a high professional standard. We offer free site visits and quotations, and can also provide initial estimates from photos or floor plans.
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Latest review:
We had the outside of our house painted by JH City Property Construction and honestly they done such a good job. The house looks completely fresh and clean now. The team were really friendly, turned up on time every day and kept everything tidy while working. They also took their time with all the preparation instead of rushing through it, which definitely shows in the final result. The paint finish came out really smooth and neat, especially around the windows and front of the house. We’re really happy with how everything turned out and would happily use them again in the future.
Bellfarm Construction
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Loft conversion Rear / Site extension New build houses / Flats Renovation / refurbishments Property Maintenance work Foundation / Ground work Drainage work, Painting & Decorating work, handyman services
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Latest review:
Painting & Decorating- 28 Oct 2024
All jobs completed to a good standard.
D&E Smart Building Solutions Ltd
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Loft conversion. New or refurbished extension. All Carpentry work. New decking or refurbished. Brick walls front of the house, or new building. New or refurbished bathroom, Tilse, Garden, Kitchen, Wood floor, Plumbing with certificate, Electrical with certificate, and much, much more..
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Latest review:
Bathroom Fitting- 7 Mar 2022
Daniel was great and we were impressed by the level of care and detail in his work. Would use him again and recommend to friends.
JED BUILDERS LTD
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
A limited company established in 2016. More that 8 years experience in construction business. We undertake all building works, big or small, managing and looking after project so the client can have the best results possible.
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Latest review:
Kitchen Fitting- 14 Dec 2018
Very lovely and professional and clean. Very prompt/punctual and worked efficiently , will be using them again to do more work in my property. Definitely with recommend them to anyone ! 10/10 from me ! Good service delivery
Solid Structures & Maintenance
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Solid Structures & Maintenance LTD At Solid Structures & Maintenance LTD, we pride ourselves on delivering high-quality building and refurbishment services across London and the surrounding areas. With years of hands-on experience in the construction industry, we specialise in: • Home Extensions & Loft Conversions • Full Renovations & Refurbishments • Kitchens & Bathrooms (design, supply & installation) • Roofing & Structural Works • Plastering, Flooring & Carpentry • General Maintenance & Repairs We manage projects from design to completion, offering reliable workmanship, clear communication, and a professional finish every time. Our team works to the highest standards, ensuring that every project is completed on time and within budget. ✅ Fully insured ✅ Workmanship guarantee ✅ Transparent stage payment plans ✅ Friendly, reliable team Whether you’re planning a full property refurbishment, an extension to create more space, or simply updating your interiors, Solid Structures & Maintenance LTD is here to bring your vision to life.
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Latest review:
Conversions - General- 11 Oct 2025
All good. Competent and helpful. Will be working with Andy and his men again. Highly recommended. From: The LR Group.
MASTER BUILD TEAM LTD
Rating: 5 out of 5
Loft Conversion Company in Walthamstow
Mbt Group Ltd working together with most highly skilled and competent trades people in the area Sandel and his team work together to help exceed all your expectations. We have specialist for each job in part
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Latest review:
Conversions - General- 18 Dec 2025
Very professional

4.6

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Walthamstow, are rated 4.6 out of 5 based on 9 reviews from customers like you.

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What services are offered by loft conversion companies in Walthamstow?

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

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 Walthamstow loft conversion company.

Find a loft conversion company in Walthamstow 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 Walthamstow.

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 Walthamstow can view your job and register their interest.

Step 2: Review and compare Walthamstow 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 Walthamstow 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 Walthamstow 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 Walthamstow

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 Walthamstow?

A local loft conversion company in Walthamstow 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 Walthamstow 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 Walthamstow 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 Walthamstow

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 Walthamstow before agreeing to start the work.

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

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