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0203 633 9646 [email protected]

Engineering meets traditional craftsmanship

We specialise in loft conversions, often the start of our relationship with clients, who then go on to request our support with extensions and refurbishment projects.

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Who We Are

London's Premier Loft Conversion Specialists

With over 27 years of experience transforming London homes, we specialise in creating beautiful, functional spaces that add value to your property. Our team of skilled architects, engineers, and craftsmen work together to deliver exceptional results on every project.

From initial consultation and planning through to the final finishing touches, we manage every aspect of your project with meticulous attention to detail. We hold all relevant certifications, are fully insured, and pride ourselves on maintaining the highest standards of workmanship.

Every project begins with understanding your vision. We then combine innovative design with practical engineering to create spaces that not only look stunning but add genuine value to your home.

Modern loft interior Completed extension
Existing client? Access your project portal →
What We Do

Our Services

Comprehensive building services tailored to your home and lifestyle.

Loft Conversions

Our core expertise — transforming unused roof spaces into beautiful living areas

As London's leading loft conversion specialists, we have spent over 27 years perfecting the art of turning underused roof spaces into stunning, functional rooms. Whether you need an extra bedroom, a home office, or a self-contained living space, our experienced team handles every detail from initial survey and design through to final decoration and sign-off.

Types of loft conversions

Dormer Loft Conversion

The most popular option, adding a box-shaped extension to the roof slope, creating maximum headroom and floor space.

Hip-to-Gable Conversion

Ideal for semi-detached and detached homes, extending the sloped hip end to create a vertical gable wall.

Mansard Loft Conversion

The most comprehensive option, effectively adding a whole new storey with near-vertical walls and a flat roof.

Velux / Roof Light Conversion

The most cost-effective option, using roof windows without altering the roof structure.

LL-Shaped Loft Conversion

Perfect for Victorian terraces, combining a rear dormer with a side dormer.

Bungalow Loft Conversion

Specialist conversion of single-storey homes, effectively doubling the living space.

Other Services

Over the years, our clients have trusted us with much more than lofts. What started as occasional requests has grown into a full suite of construction services.

House Extensions

Rear, side, and wrap-around extensions. Single and double storey. Our solution partners can help you manage planning applications, party wall agreements, and we build to the highest standards.

Renovations

Complete home refurbishments, kitchen and bathroom fitting, structural alterations, and modernisation of period properties.

Design & Planning

Our solution partners can help you with architectural design, planning applications, building regulations, structural engineering, and project management services.

How It Works

Our Process

A 5-stage plan to start works. Wherever you are in the journey, we can pick up and push forward — and where there’s a gap, our solution-partner network fills it.

Start

Get in touch

Drop us an enquiry, send a WhatsApp, or book a no-obligation site visit. We meet you where you are — and once you’re with us, we walk through the same handful of questions to figure out the fastest route to your finished project.

1
Do you have an architectural plan you’re happy with?
Generally takes ~2–3 weeks to finalise.
If yes
Great — we move on to Step 2 and look at structural plans.
If not
No problem — our solution-partner architects can draw up exactly what you need. This bumps everything one phase up the timeline.
2
Do you have structural plans?
~2–3 weeks to finalise — needs your architectural plans as the starting point.
If yes
Excellent — that’s the most useful piece of paperwork we can have. On to Step 3 and planning permission.
If not
No worries — our solution-partner structural engineers can draw up your structural plans. This bumps everything one phase up the timeline.
3
Have you received planning permission?
~1 week to prepare the application (assuming compliant architectural plans), then ~6 weeks for the council to decide.
If yes
Onwards to Step 4 — we look at party wall notices.
If not
Do you need help with planning permission? We handle the full application — pre-app advice, drawings, submission, and follow-through with the local council.
4
Do you need party wall notices or agreements — and have you served them?
Needs both architectural and structural plans before notices can be served — ~1 week to prepare, then up to ~6 weeks before works can start.
If yes
Perfect — we move to Step 5 and put together a binding offer.
If not
Do you need help serving party wall notices? Our solution-partner surveyors handle the whole process — drafting, serving, and resolving any dissents.
5
With plans we can give you a binding offer — and with permissions and notices in place we can start the project in 2–3 weeks.
  • Instruct building control services
  • Arrange logistics — scaffolding, skip and portable toilets
  • Order starting materials
  • Start works
Full build
Our expert craftspeople deliver the entire project — average 10 weeks from breaking ground to handover.
Self-build
If you fancy doing some of the work yourself, we can help you with your self-build — backing you up on the tricky structural bits, materials sourcing, and sign-off.

Ready when you are

Book a no-obligation site visit and we’ll help you push forward from wherever you are. Binding quote within 3 days; project start within 2–3 weeks if everything is ready.

Book a no-obligation site visit →
Free Tool

Loft conversion cost calculator

Our free cost estimation tool gives you real cost profiles we are experiencing right now. Adjust the inputs below for a live estimate — then book a free site visit for a binding quote. In our experience, project and procurement management services make projects unnecessarily expensive, so we help and encourage clients to self-manage their projects and procurement to optimise project costs. And if you want to self-build your own project, you can book a small number of days with our team members (one week gives you 20 man-workdays) — so we can help you with the trickiest parts of the project and save you when you need saving.

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Measure the loft floor footprint. Around 80% becomes usable room with full head height (more for a mansard, less for Velux) — the rest is low eaves, great for storage.
Indicative total project cost
£0 + VAT
—
—
✓ This is what we contract
Our labour £0
An estimate — we confirm it at your booking.
Fixed-price labour. If the project overruns our planned timeline, we cover our team's overtime labour costs — unless the overrun is due to material sourcing or third-party delays beyond our control.
You pay direct — third parties
Conversion type—
Finish—
Book a free site visit for a binding quote →

Indicative only — not a quotation. All prices exclude VAT. By default you self-manage: you buy materials direct from merchants on our trade accounts with no mark-up, and electrics, heating and gas-safe work are by certified third parties you instruct. Optionally, add our Procurement or Project management service and we’ll contract and manage those items for a 15% fee (shown above) — your actual price depends on the property, access, structure, specification and planning. We give a binding written quote after a free site visit.

Our Work

Featured Projects

A selection of our recent loft conversions and home transformations across London.

Victorian Terrace Loft Conversion

Victorian Terrace Loft Conversion

West London — Complete Refurbishment Project with an L-Shaped Dormer with En-Suite

Terrace Velux Loft Conversion

Terrace Velux Loft Conversion

North England — Large Velux Loft Conversion for a Sizeable Building

Lightweight Steel Loft Conversion

Lightweight Steel Loft Conversion

Canterburry — Lightweight Steel Loft Conversion to Maximise Usable Internal Space While Reducing Structural Load on the Existing Building

Bungalow Cabrio Loft Conversion

Bungalow Cabrio Loft Conversion

South London — Velux loft conversion with cabrio windows to minimise the build time and visual impact of the conversion

Detached House Dormer Loft Conversion

Detached House Dormer Loft Conversion

South England — Large dormer loft conversion adds 3 bedroom and 1 bathroom to the loft space

End of Terrace Dormer Loft Conversion

End of Terrace Dormer Loft Conversion

East London — A Small Side Dormer on Hipped Roof

Detached Dormer Loft Conversion

Detached Dormer Loft Conversion

Reading — Large Dormer Conversion with En-Suite Bathroom

Mansard Loft Conversion

Mansard Loft Conversion

North West London — Mansard Loft Conversion Project with En Suite Bathroom

Our Trusted Partners
Travis Perkins
Jewson
Screwfix
Wickes
Velux
Dulux
British Gypsum
Knauf
Howdens
Toolstation
Selco
Saint-Gobain
Travis Perkins
Jewson
Screwfix
Wickes
Velux
Dulux
British Gypsum
Knauf
Howdens
Toolstation
Selco
Saint-Gobain
Detail Work

Bits & Bobs

Smaller pieces we enjoyed building for our clients.

Installation of a kitchen according to manufacturer and designer specs

Installation of a kitchen according to manufacturer and designer specs

Galley kitchen with an island and quartz worktops

Back garden platform

Back garden platform

Porcelain tiled with bullnose edge finish

Custom Joinery Work (Cabinet and Bookshelves)

Custom Joinery Work (Cabinet and Bookshelves)

Build-to-fit cabinet and bookshelf designed per client requirements

Garden Fencing & Door

Garden Fencing & Door

Built and painted based on client requirements

Custom designed and built pine wall unit

Custom designed and built pine wall unit

Build-to-fit wall unit designed per client requirements

Custom designed and built wood cladded under stair storage unit

Custom designed and built wood cladded under stair storage unit

Build-to-fit under floor storage unit designed per client requirements

Patio works

Patio works

Ground improvement and stone works with wood cladded steps

Custom Joinery Work (Cabinetry)

Custom Joinery Work (Cabinetry)

Build-to-fit cabinetry designed per client requirements

Wetroom with small tiles and Grohe Bathroom Fixtures

Wetroom with small tiles and Grohe Bathroom Fixtures

Custom Joinery Work (Shelf & Folding Table)

Custom Joinery Work (Shelf & Folding Table)

Build-to-fit shelf and Folding table designed per client requirements

Custom Designed and Built Utility Room System

Custom Designed and Built Utility Room System

Build-to-fit utility room system designed per client requirements

Outdoor Side Door

Outdoor Side Door

Built and painted a secure door for side access path of the house

Installation of traditional Victorian Mosaics based on custom design

Installation of traditional Victorian Mosaics based on custom design

Back Garden Patio

Back Garden Patio

Ground improvement and stone works

Reviews

What our clients say

Real feedback from homeowners across London who trusted us with their projects.

★★★★★
What a great bunch of people! I would give 10 stars if I could. 1. Totally reliable. Not one day have they not turned up or even been late. Unheard of in the building world I know but true. 2. Within budget and a good quote. Again unheard of when doing a build but also true. 3. Building work is messy but they really do a good job of cleaning up. 4. Perhaps the most important is the quality of the work. No shortcuts or corner cutting here. I’ve had a lot of building work in various different homes and to date this is the best company I’ve worked with. I 100% recommend.
Annie Campbell
London
★★★★★
We recently completed a loft conversion with Engineered Lofts and are extremely pleased with the entire experience. From the initial consultation through to completion, the team was professional, organised, and communicative throughout the project. The workmanship and attention to detail were excellent and the build quality exceeded our expectations. We would highly recommend Engineered Lofts to anyone considering a loft conversion. Thanks, Luis Almeida
Luis Almeida
London
★★★★★
Really happy with the loft conversion completed by Engineered Lofts Ltd earlier this year. The best part was definitely how fast they got everything done. The guys worked really well as a team and finished right on schedule. Many thanks!
Deklyn Bane
London
★★★★★
Had these guys out and they were brilliant. They were friendly, professional and did a great job. Will be hiring them again for any future work. Highly recommended.
Karen Barry
London
★★★★★
Engineered Lofts has done several pieces of work for me. I found them to be efficient, punctual and friendly. And, they gave me good advice.
Norman Wilson
London
★★★★★
Engineered Lofts carried out various home improvement jobs and refurbishments, to very high standard quality work. They went above and beyond and did our whole garden. I am really impressed with their work. They are clean, reliable and professional workers. Thank you so much guys. Not to mention Khishgee who is always at the other end of the phone if needed. I would highly recommend this Company.
Lucy
London
★★★★★
I couldn’t recommend Engineered Lofts Ltd highly enough. Jason and his team of highly skilled builders completed my loft conversion in a matter of weeks. I’m incredibly impressed with the speed, work ethic, and quality of workmanship from the whole team. Thank you, Jason and team — we absolutely love our new loft space. It has completely transformed our home 🏠🙌
Andreas Orfanos
London
Common Questions

Frequently Asked

How long does a loft conversion take?
It depends on the type and size. As a rough guide: a Velux/roof-light conversion is often the quickest, dormer and hip-to-gable conversions typically run several weeks, and mansard conversions take the longest because the roof structure is rebuilt. We give you a project-specific timeline as part of the quote after the free site visit.
Do I need planning permission for a loft conversion in London?
Many loft conversions in London fall under Permitted Development rights and don't need full planning. The main exceptions are mansard conversions, conversions on flats and maisonettes, properties in conservation areas, listed buildings, and any work that extends beyond the volume / shape limits set by Permitted Development. We assess this at the survey and handle the application either way.
How much does a loft conversion cost in London?
Cost depends heavily on the type of conversion (Velux is the most affordable, mansard the most expensive), the floor area, the finish, and the property's structural starting point. We don't quote ballpark figures online because they're often misleading — instead we provide a written, no-commitment quotation after the free site visit so you have an actual number for your house.
Can I live in my house during the work?
Most clients stay in their home throughout. The loft is sealed off from the rest of the house and, where the property allows, the team accesses the work area from external scaffolding rather than through the home. We agree the access plan with you up front and keep disruption to a minimum.
Do you handle party wall agreements?
Yes. Loft conversions and extensions to terraced and semi-detached homes almost always need party wall notices served on the adjoining owners. We manage the entire party wall process on your behalf, including issuing notices and coordinating with surveyors where required.
What types of loft conversions do you do?
All the common types: dormer (the most popular), hip-to-gable (for semi-detached and end-of-terrace), mansard (the most space-creating, common in Victorian terraces), L-shaped (extends the dormer over the back addition), Velux / roof-light (cleanest planning route), and bungalow conversions.
Do you cover all of London?
Yes. We operate across Greater London — all 32 boroughs — and book site visits anywhere within the M25. Travel time is the only practical limit.
Who will manage my project?
Each project is led by one of our Solution Partners — senior practitioners with decades of combined experience across the building trade, structural engineering, and architecture. The Solution Partner is your single point of contact from the initial survey through to the final handover, and they direct the team day-to-day on site.
Get in Touch

Contact Engineered Lofts

Recommended · binding offer

No obligation site visit & Binding Quote

If you have structural plans we can give you a binding offer — if not, our structural engineer can help you put them together. With planning permission and party wall notices already in place, in most cases we can start works within 2–3 weeks.

Choose a time →

Send us your questions using the form below and we'll get back to you within 24 hours. Alternatively, if you'd prefer to get in touch directly, please call us on 0203 633 9646 or email [email protected].

Enquire

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Got a question about your loft conversion? Ask us anything and we'll get back to you within 24 hours. Plans, drawings or photos help us answer in more detail — attach them below.

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