Loft Conversion Companies in Sidcup

Name: Loft Conversion Company
Brand: MyBuilder
SKU: loft-conversion-company
Rating: 5 (9 reviews)

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Some of our top rated loft conversion companies in Sidcup

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bns construction ltd
Rating: 4.5 out of 5
Loft Conversion Company in Sidcup
Hi me and my partner are very experienced, time served, clean, realiable, and very professional. Carpenter and painter and decorator who are willing to meet your demands of the job, price it reasonably and complete it with a high standard finish leaving you completely satisfied!!
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Latest review:
Carpentry- 12 Dec 2014
Work was completed the next day. Many thanks and will use again. Xx
CMT Building services
Rating: 5 out of 5
Loft Conversion Company in Sidcup
I'm Chris from CMT Building services we do all aspects of carpentry and plastering we are a reliable and friendly team that will make sure the work goes smoothly as possible
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Latest review:
Joinery & Cabinet Making- 7 Feb 2019
I had three quotes and Chris was the most competitive for the job. He was able to come and assess the job soon after making contact and provided a quote quickly afterwards. He was accommodating on timescales and on the day he and Dylan turned up bang on time and got to work quickly. He took care with mess and cleaned up well after the job. Chris consulted with me on little design decisions that needed to be made on the day and the end result is a very good job boxing in my Ikea bookcases that I just need to paint (I hadn’t asked him to do this for me). I’ve got the result I wanted for a fraction of the price of custom built cabinets. Chris is a super friendly guy who was happy to advise me on some questions I had about possible works in my home. We have two nosy dogs who love to acquaint themselves with whomever comes to the house and he and Dylan were great with them. I’d definitely hire him again.
creative solutions 4 you limited
Rating: 5 out of 5
Loft Conversion Company in Sidcup
a small building and restoration company, a builder with over 20 years of experience, we take proud of our projects building a good relationship with our clients.
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Latest review:
Loft Conversion- 27 Apr 2022
Completely Surpassed Expectations! We had Williams and his team in to do some under eaves storage. We had what we had in mind, which they quoted for, and whilst doing the work, they identified better ways of doing things, implemented them and still stuck to the agreed price. As these guys do this more than me, they are able to use that expereince, educate the client and achieve phenomenal results. Great value for money, now i have a large, light and usable storage space where I had next to none, my only problem is finding the stuff to fill it with. They even installed lighting meaning it works that much better. Get them in for a quote, if for no other reason than just to understand your options. His team are hardworking, friendly and do the work with a great sense of humor, taking pride in what they do. Gracias Williams!
Adams carpentry & sons ltd
Rating: 5 out of 5
Loft Conversion Company in Sidcup
Adams carpentry & sons is a family run business who take on all aspects of carpentry works from roofing down to skirtings and everything in between. All of our Carpenters are trusted, reliable and most importantly friendly. We pride ourself on the quality of our work the knowledge we have gained over the years and the cleanliness we leave the work place after each and everyday.
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Latest review:
Rob completed a large portion of our home refurbishment, to include a knock through, kitchen installation, sky lantern installation, all new woodwork (skirting, archs etc) and media wall. I am a very fussy customer but Rob exceeded all expectations, compelting all work to a very high standard. Very professional, took the time to talk through all options before making our dreams a reality. Always left the house clean and tidy. Work was completed ahead of schedule. I do not usually write reviews but it is the least I can do as I sit in my beautifully refurbished house! Thanks Rob, I will be in touch in the future for sure.
Sawmore Carpentry
Rating: 5 out of 5
Loft Conversion Company in Sidcup
Sawmore Carpentry is a highly reputable carpentry firm based in Kent. We are fully insured and take pride in all our work.
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Latest review:
Handyman- 15 Mar 2022
Jack was professional and quick. Very reasonably priced also. Would definitely recommend.
BUILDING ANDREW & GREG LTD
Rating: 5 out of 5
Loft Conversion Company in Sidcup
Welcome to our profile, we are a company specializing in all kinds of renovation and construction works, all the works shown in the photos are made by us, we are diligent and open to all kinds of innovative ideas of our clients, in our opinion there are no impossible things to do, you have to Just think and take action, all the best A&G
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Latest review:
Bathroom Fitting- 2 Mar 2021
Greg and Andrew are nice guys and got the job completed to a good standard.
Alain Carini
Rating: 5 out of 5
Loft Conversion Company in Sidcup
Hi There, I am a structural engineer with 8 years experience in residential projects (new builds and refurbishments). I have decided to start my own business as soletrader. I am proficient with structural sotware, Autocad and drainage design.
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Latest review:
Based on architect recommendation, we contracted Alain on a private basis to produce structural engineering designs for our home renovation. He undertook a site visit and then produced structural designs to support a large number of elements related to new support beams, lintels etc. These have been iterated with the architect and the process has been very smooth. He was very responsive and nice to interact with. Wouldn't hesitate to recommend as a structural engineer for the type of project we undertook (loft conversion, new pitched roof, new openings within walls and ground floor open plan conversion)
Loftnix Developments LTD
No reviews yet
Loft Conversion Company in Sidcup
Loftnix Developments is a trusted, London-based construction company specializing in high-quality loft conversions, home extensions, and full property refurbishments. With over a decade of hands-on experience, we take pride in turning ordinary spaces into extraordinary living environments. From concept to completion, we manage every detail of your project with precision, professionalism, and a personal touch. Our team is committed to delivering work that is not only structurally sound but beautifully finished on time and within budget. Whether you're looking to create a new bedroom in your loft, expand your kitchen, or completely renovate your home, Loftnix Developments brings the craftsmanship, care, and expertise to bring your vision to life. We serve clients across North and Greater London, and our reputation is built on word-of-mouth, repeat business, and high client satisfaction. Get in touch today for a free, no-obligation quote and discover how we can help you maximize the potential of your home.
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Eleven Construction Ltd
Rating: 5 out of 5
Loft Conversion Company in Sidcup
ECON provide best quality building services to customer who are looking for high standard works for their residential properties up to their desired satisfaction. We are a professional building construction and maintenance company with highly skilled staff & workers of all trades to carry out the task given to our company.
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Latest review:
Builders and team work like professionals and completed everything in time. Highly recommended team of professionals.
Shaped Builders LLP
Rating: 4.6 out of 5
Loft Conversion Company in Sidcup
Shapedbuilder is a locally based London custom residential building company with over 14 years of experience which offers a wide array of building and renovation services, for any job, big or small.
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Latest review:
Bathroom Fitting- 17 Nov 2019
Diagnosed the problem and completed the job. Efficient, clean and professional
i loft Conversions ltd
Rating: 5 out of 5
Loft Conversion Company in Sidcup
We are lofts specialist covering East London for over 20 yrs. We pride ourselves on customer satisfaction, quality & speed at sensible pricing. Our team is highly qualified & all works come with trade certificates & a 10 yr guarantee on materials & workmanship. We can create as little as a loft shell, to a fully completed loft from start to finish including; drawings, project mgt, building control to decoration to allow you to sit back & enjoy the progress within as little as 5-6 wks.
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Latest review:
Extremely professional. Workmanship is of high quality. Very reliable. He redesigned & rebuilt our kitchen with a utility room & walk in shower room. He rebuilt our shed & converted into a usable work area and redesigned our garden.
LS TRADEMAN LIMITED
No reviews yet
Loft Conversion Company in Sidcup
LS TRADEMAN LIMITED company based in South East London. We have over a decade of experience in building, conversion. renovating, refurbishment and much more. We employ / sub contract only people we know are capable of offering the same high standard, and reliabilty as we do.
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Johny the Builder
Rating: 5 out of 5
Loft Conversion Company in Sidcup
PROFESSIONAL BUILDERS. Johny The Builder Ltd are Building Contractors based in Romford, Essex. We undertake commercial and domestic Refurbishments, Roofing, Loft conversions, Brickwork, Extensions, Basements and new building projects. We make your House a Home
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Latest review:
Loft Conversion- 4 Apr 2018
We cannot praise Johnny and his team enough. They were simply fantastic throughout our project - they have done a beautiful loft conversion, and transformed the rest of the house.. installed two new bathrooms, opened up the downstairs and installed a new kitchen, installed new front and rear doors and bifolds, restored original fireplace, decorated. They are delightful guys to have around, Johny keeps a firm grip of the project and makes sure things don’t get delayed. They are proper craftsmen and real perfectionists. They work hard, they have an eye for detail, they are unfazed by problems, they kept to schedule - you couldn’t ask for more. Johny was around to give advice at any stage we needed, they left things clean and tidy and have a real pride in their work. We would highly recommend Johny to anyone - he’s a great, trustworthy, hardworking and genuine guy who does exactly what he says he will. This was our first major building project but we couldn’t have been in better hands.
R&T Carpentry & Construction
Rating: 5 out of 5
Loft Conversion Company in Sidcup
Ryan - I am a very hard working individual and always provide a pleasant service. I have over 13 years experience in the fields i cover. I am fully insured. We cover a very wide range of works including, loft conversions, extensions, garage conversions, Media walls, custom garden studios, Roofing, porches, carpentry, painting and decorating and some plumbing and electrical works. We always welcome new customers and will be happy to quote any work you require, however big or small. Thank you.
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Latest review:
Conversions - General- 11 Feb 2022
Basic one day job but Ryan was reliable. Quoted within a few days and Job completed within a couple of weeks No problems at all.
shalom property development ltd
Rating: 5 out of 5
Loft Conversion Company in Sidcup
Shalom Property Development ltd is a small construction company based in the Croydon area. We specialize in property refurbishment, house extensions, loft conversions, garage conversions, etc. We also undertake projects like plastering, painting/decorating, electricity, plumbing, tiling, flooring(laminate, wood, bamboo), bricklaying.
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Latest review:
Plastering- 6 May 2025
Amazing guys. Hardworking, tidy, professional. They worked in our house for 3 months and we were super happy with the work and everything. We invited them to do more work later on. 100% probably the most sincere and trustworthy builders we met. Only them. No one else from now on.
DLL CONSTRUCTION LTD
No reviews yet
Loft Conversion Company in Sidcup
I am an experienced builder with over 20 years experience and knowledge in the industry. I operate my company with a true passion for the construction industry, and like to be involved directly with the client/architects in order to satisfy their bespoke requirements no matter how big or small they might be, ranging from general builders works and loft conversions, to full 3 storey + extensions.
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Top rated Loft Conversion Companies

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

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What services are offered by loft conversion companies in Sidcup?

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

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 Sidcup loft conversion company.

Find a loft conversion company in Sidcup 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 Sidcup.

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 Sidcup can view your job and register their interest.

Step 2: Review and compare Sidcup 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 Sidcup 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 Sidcup 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 Sidcup

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 Sidcup?

A local loft conversion company in Sidcup 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 Sidcup 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 Sidcup 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 Sidcup

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 Sidcup before agreeing to start the work.

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

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