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Loft Conversion Companies in Marylebone, West London

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Some of our top rated loft conversion companies in Marylebone, West London

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  • Loft Conversion Company in Marylebone, West London

    All Forms Of Property Refurbishment & Maintenance In London & The Surrounding Counties To A Standard That Suits Your Budget

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  • Loft Conversion Company in Marylebone, West London

    Hi everyone, We are a family-run business with over 10 years experience and pride ourselves on our incredibly high-standard quality of work, customer rapport, competitive prices and efficient time-frames. With our customers' satisfaction held in the heart of our work, we will go the extra mile to ensure all needs and requirements are met and you are 100% satisfied with the end product. 'If it isn't good enough for our home, then it isn't good enough for yours'.

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  • Loft Conversion Company in Marylebone, West London

    Sintons Projects is a London-based construction company founded and led by Harry Sinton, specialising in high-end home improvements, renovations, and extensions. From the beginning, our goal has been and continues to be to deliver exceptional craftsmanship and create spaces our clients and we can truly be proud of. Follow our journey on instagram @sintons_projects

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  • Loft Conversion Company in Marylebone, West London

    We are polish Team, 20 years of experience in building works, we are making all general building works and especially: loft, roofing, extensions, all house refurbisment.

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  • Loft Conversion Company in Marylebone, West London

    Remdraly Design Ltd — 25+ years of carpentry & joinery expertise, trading since 2015. We deliver kitchens, lofts, flooring, extensions and full refurbishments across East London, for domestic and commercial clients. Reliable, professional craftsmanship — done right, every time.

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  • Loft Conversion Company in Marylebone, West London

    Loft fitter with 20 years experience. High quality and reasonable prices.

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  • Loft Conversion Company in Marylebone, West London

    Hi i have 15 year experience on construction i have 7 year experience on basament swimming pool underpinning .10 years experience on loft convenient and extensions.

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  • Loft Conversion Company in Marylebone, West London

    Specialist Party Wall Surveyors | Serving London & the Surrounding Areas At Grandline Party Wall Services, we make the party wall process simple, clear, and stress-free for homeowners, developers, and neighbours alike. With over 10 years of hands-on experience, we specialise in: Serving and responding to Party Wall Notices Acting as Agreed Surveyors or as part of a two-surveyor process Preparing Schedules of Condition Drafting and negotiating Party Wall Awards Advising on basement extensions, lofts and extensions We’ve helped 100s of clients navigate party wall matters with clarity and confidence, from first-time renovators to seasoned developers. Our approach is professional but down-to-earth: no jargon, no drama, just solid advice and fast, fair resolutions. We’re always happy to chat through your plans and let you know whether the Party Wall Act applies. No charge, no obligation. 🟩 Fully insured 🟩 Quick turnarounds 🟩 Friendly, fixed-fee pricing available 📍 Based in East London and covering all London boroughs and the M25 area. Let’s get your project moving the right way. 📞 Get in touch for a free consultation today.

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  • Loft Conversion Company in Marylebone, West London

    We are different from other construction companies as we provide timely and unique services to our respected clients. We see to it that our orders reach our clients on time and allow time to negotiate a fair price We as a construction company, strive hard to stand up to the expectations of our clients, and if you choose us, we will endeavour to give you the best service as possible. If we make a mistake, we will own up and rectify the error at no cost to the customer

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  • Loft Conversion Company in Marylebone, West London

    Walter Weir Ltd - established as a design and build contractor for the highest specification projects in residential and commercial developments in London & The South East. Our team of skilled tradesman, project managers & architects cover all scope of works within construction, who are experienced professionals, making the dream a reality for every client. We believe in cementing lasting relationships with clients & this can only be achieved by maintaining a constantly high standard of work.

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  • Loft Conversion Company in Marylebone, West London

    Experienced builder in all reconstruction works including loft conversions and extensions as well as re development plans including all plastering works including plastering ,rendering , screeding ,dry lining ,tacking ,carpentry and joinery as well as board work and installing insulation in many forms such as celotex, rockwool, interior and exterior insulation board and also soundboard installation to regulation standards ,ground works and drainage also undertaken to superior standards

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  • Loft Conversion Company in Marylebone, West London

    Hi, my name is Cipriano from C&C Construct Ltd. I have over 20 years of experience in the construction industry. Although we are new to this platform and do not yet have reviews here, we can provide references from private clients and show examples of completed projects. We carry out all types of construction work, both large and small, always to a high standard. We take pride in delivering quality workmanship, keeping sites clean and tidy, and ensuring every project is as smooth and stress-free as possible. Our team is professional, polite, and committed to customer satisfaction.

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  • Loft Conversion Company in Marylebone, West London

    We are a multi-disciplinary group of architectural designers, structural engineers, interior designers,builders and support staff. Our backgrounds span residential extensions, commercial developments, restaurants, and bespoke interior schemes. Across projects big and small, our collaborative process is shaped by mutual respect, timely advice, and real technical depth.

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  • Loft Conversion Company in Marylebone, West London

    With over 20 years of experience in the building industry, I specialise in high-quality house extensions and loft conversions that add space, value, and long-lasting quality to your home. I take pride in delivering work to a professional standard, with a strong focus on reliability, clear communication, and attention to detail. From the initial design stage through to completion, I work closely with customers to ensure every project is carried out smoothly, safely, and to the agreed timeline. Whether you're looking to expand your living space, create an extra bedroom, or fully transform your property, I bring the skills and experience needed to deliver results you can trust. I’m committed to providing honest advice, transparent pricing, and a clean, tidy working environment. Customer satisfaction is extremely important to me, and much of my work comes from repeat clients and recommendations. I look forward to helping bring your next project to life.

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  • Loft Conversion Company in Marylebone, West London

    Welcome to Medici Group – where craftsmanship meets distinction in London. Beyond building spaces, we craft transformative experiences. Specialists in various trades, we redefine construction with unwavering quality, personalized service, and professionalism. From bespoke bathrooms to precise tiling, we turn visions into tangible impressions. Choose Medici Group for extraordinary living. Contact us to bring your aspirations to life.

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  • Loft Conversion Company in Marylebone, West London

    We are established builders in the London area. With over 12 years experience in the construction industry, we pride ourselves on high-quality workmanship and good value for money. As contractors, we construct new buildings, reconstruct and renovate existing buildings, build extensions, covert roofs and layout new interiors. We have a reputation for delivering projects within time catering for each client and tailoring to their specific requirements.

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4.6

Top rated Loft Conversion Companies

Our Loft Conversion Companies in Marylebone, West London, are rated 4.6 out of 5 based on 11 reviews from customers like you.

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What services are offered by loft conversion companies in Marylebone, West London?

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

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 Marylebone, West London loft conversion company.

Find a loft conversion company in Marylebone, West London 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 Marylebone, West London.

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 Marylebone, West London can view your job and register their interest.

Step 2: Review and compare Marylebone, West London 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 Marylebone, West London 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 Marylebone, West London 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 Marylebone, West London

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 Marylebone, West London?

A local loft conversion company in Marylebone, West London 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 Marylebone, West London 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 Marylebone, West London 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 Marylebone, West London

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 Marylebone, West London before agreeing to start the work.

Do I need planning permission for a loft conversion in Marylebone, West London?

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

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