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Loft Conversion Companies in St James

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

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Some of our top rated loft conversion companies in St James

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  • Loft Conversion Company in St James

    The company has diversified to include architecture, build and project management – helping clients to realise their aspirations through the successful integration of these services. Challenging the traditional approach of procuring these services separately, and shown how coordinating all these disciplines under one roof achieves greater benefits across quality, time and investment.

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  • Loft Conversion Company in St James

    I'm Mathew Crane, a qualified and apprenticeship served carpenter with 11 years of experience in all aspects of 1st and 2nd fix carpentry. I have experience in new home build construction and renovation, extension and loft conversions. From foundations all the way to finishing joinery, I am competent and experienced.

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  • Loft Conversion Company in St James

    At LASTING LTD, we specialise in high-quality residential construction and full property renovations across London and the surrounding areas. With years of experience and a strong reputation for reliability, we deliver projects with exceptional craftsmanship, clear communication, and attention to every detail. Our services include complete home refurbishments, loft conversions, kitchen and bathroom installations, structural works, flooring, plumbing, heating and electrical upgrades, and all types of internal finishing. Whether it’s a single room or a full house renovation, we provide honest advice, transparent pricing, and results built to last. We take pride in working cleanly, safely, and efficiently, ensuring every project is completed to the highest standards. Most of our clients come back to us again and again — because they trust our workmanship and appreciate our professional approach. If you’re looking for a reliable contractor who delivers quality without compromise, LASTING LTD is here to help bring your project to life.

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  • Loft Conversion Company in St James

    I’m an experienced builder with 25 years of building work experience in Extensions, Loft Conversions, Refurbishments, Renovations, Bathrooms, Kitchens, patio, fence, rendering, pointing and all internal jobs,

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  • We are a friendly family business and we cover all aspects of the building trade. We have been trading for over 15 years in the Domestic Building trade. We undertake all large or small works so if you would like some professional advice just call, text, or email us. We carry out all the works on the domestic house: -Kitchens -Bathrooms -Plastering -Electrical -Plumbing -Painting & Decorating -Floors -Extensions -Loft Call now for free estimates and friendly advice.

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  • Loft Conversion Company in St James

    Backed by more than 30 years’ experience in the industry, Bask Construction Ltd have established themselves as one of the leading installers of all types of suspended ceilings, walls, and partitions in the Greater London area. From drywall to demountable partitioning systems, our installations are always completed to the highest possible standard.

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  • Loft Conversion Company in St James

    Hi We have got 15y experience. We are a specialists with: -Basements -loft conversions -extensions - general Renovation

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  • Loft Conversion Company in St James

    Hi Here at redwoods we are a team of 12 architects working will help you with manly residential projects like basements, extension, dormers, aditinal story, flat conversions etc We are very familiar with the planning policies which we will be able to advise you beforehand what we belive is achievable to get permission

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  • Loft Conversion Company in St James

    At Maksmith Ltd, we specialise in loft conversions, house extensions, renovations, and residential construction projects across London. Established in 2024, the company was founded to provide homeowners with a reliable, professional building service backed by decades of hands-on industry experience. The company is led by Stephen Smith, an experienced construction and project management professional with over 40 years in the building industry. Before founding Maksmith Ltd, Stephen successfully managed projects for some of London's leading loft conversion and extension contractors, overseeing multiple developments and delivering high-quality results on time and within budget. Stephen's reputation has been built on clear communication, strong project leadership, and an ability to coordinate skilled teams efficiently throughout every stage of a build. His practical construction knowledge, combined with a Bachelors level Higher Diploma in Construction Management, allows him to manage projects of varying size and complexity with confidence and precision.“My strength is in building and completing projects, I'm good with that and have the ability to direct & support teams to deliver at scale and a track record to prove it”. At Maksmith Ltd, we understand that every project is a significant investment. That's why we focus on: ✓ Clear and honest communication
 ✓ Professional project management
 ✓ High-quality workmanship
 ✓ Reliable timelines and budgets
 ✓ Exceptional customer service Our goal is to make the process straightforward, transparent, and stress-free while delivering results that exceed expectations. We are proud of our reputation and are happy to provide references from previous clients upon request. Get in touch today to discuss your project and see how Maksmith Ltd can help bring your vision to life.

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  • Loft Conversion Company in St James

    We ensure customer satisfaction with every job we do. My reliability and workmanship is second to none. We like to make sure our customers are 100% happy with our work. We supply free quotes and cover all aspects of building works from footing to roofing.

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  • Loft Conversion Company in St James

    Here at kp building we want the best for our clients.we are a building company that has all your building needs under one roof.we specialise in loft conversions and extensions to a very high standard. We also do all types of building work no job to small. References available on request and can show jobs that I have completed.

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  • Loft Conversion Company in St James

    Interstar Building Contractors was formed in 2005 with over 20 years of experience in supplying to quality services to the UK Construction industry. Our Staff have extensive knowledge of working within the Capital, and pride themselves on producing a top quality finishing within agreed time frames. We work extensively throughout London and South. For almost 10 years we have offered a wide range of construction services in London. We strive to maintain the highest standards while exceeding client’s expectations at all levels. We not only honor commitments, but we are known for meeting though deadlines while delivering nothing but the best. We aim to create a responsive client relationship that allows us to meet and even exceed the goals of each of our projects.

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  • Loft Conversion Company in St James

    People know us for best finish. Having more than 15 years of experience in building work. No job big or small for us.we love what we do. You will get Perfect finishing for your job. We will finish the job on time. No delays!!

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  • Loft Conversion Company in St James

    We Specialise in all your roofing needs from basic tile replacements to new membrane installation and new guttering system. With a vast range of fascia and soffit designs, you have come to the right place.

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  • Loft Conversion Company in St James

    O G electrical is based in Belvedere and Part P registered with Napit and the Electric safety register. All electrical work undertaken, with 25 years knowledge and experience. Re wires , fuseboards , under floor heating , Cctv , lighting , fire alarms , garden and drive lights,commercial fit outs, 3 phase, extract fans all Electrical installs carried out. Installations to new build houses/apartments throughout London and Kent Inspection and testing Eicrs All work guaranteed.

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  • Loft Conversion Company in St James

    LS London Contractors - Experienced and friendly team, located in South West London, specialising in extensions, loft conversions and all refurbishment works to a high standard finish for customers.

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4.4

Top rated Loft Conversion Companies

Our Loft Conversion Companies in St James, are rated 4.4 out of 5 based on 12 reviews from customers like you.

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What services are offered by loft conversion companies in St James?

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

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 St James loft conversion company.

Find a loft conversion company in St James 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 St James.

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 St James can view your job and register their interest.

Step 2: Review and compare St James 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 St James 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 St James 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 St James

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 St James?

A local loft conversion company in St James 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 St James 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 St James 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 St James

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 St James before agreeing to start the work.

Do I need planning permission for a loft conversion in St James?

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

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