Better HomesSpace to grow
Give someone a room of their own, make space for a new arrival or create the bedroom you have been putting off.
Loft conversions in London
Space above. A better home below.
An extra bedroom as your family grows. A quiet place to work. Somewhere guests can feel at home. We turn the space above you into a comfortable part of the house, with thoughtful planning and a team that keeps you informed.
5.0/5 · across all review platformsExtensions, lofts and renovations
- Rated by homeowners
- 5.0 / 5Across all review platforms
- Completed work
- Specialist buildersExplore our projects →
- Insurance cover
- Up to £10 millionRequest insurance details →
- Workmanship guarantee
- Up to 10 yearsCover by work type
- Guide budget
- £45,000 to £130,000+ for larger conversions
- Typical construction programme
- 8 to 16 weeks; rooflight projects 4 to 6 weeks
- Workmanship aftercare
- 10 years for loft workmanship
Life in your finished home
The room you need could already be above you.
Start with the moments you would like to make easier. We will help you think through the possibilities, the space you have and what feels right for your budget.
A quieter corner
Close the door on the working day, read in the afternoon light or enjoy a little room to yourself.
Keep the place you love
Stay close to your neighbours, familiar routines and favourite places, with more space for what comes next.
Explore your options
£25,000 to £45,000
Rooflight / Velux
Best when your loft already has enough usable height and you want the simplest route to an extra room.
4 to 6 weeks build
£45,000 to £75,000
Rear dormer
The most common London option when you need proper headroom, a practical stair, and a room that feels fully usable.
8 to 12 weeks build
£55,000 to £80,000
Hip-to-gable
Strong fit for semi-detached and end-of-terrace homes where the sloping side roof is limiting the space you can actually use.
9 to 13 weeks build
£60,000 to £90,000
L-shaped dormer
A high-value route when you want to maximise floor area and create space for a larger bedroom plus bathroom or storage.
10 to 14 weeks build
£70,000 to £100,000+
Mansard
The premium option when you want the biggest transformation and are prepared for a more planning-led process.
12 to 16 weeks build
Completed work
Explore our loft and renovation work
Explore loft and bathroom work in E17 and a combined extension, loft and refurbishment project in E10.
E17, East London · Loft + Bathroom Renovation
Loft Conversion and Bathroom Renovation in E17
Loft and bathroom work with a timber staircase, rooflit upper-floor space and a bathroom combining a freestanding bath, dark shower tiles and a timber vanity.
E10, East London · Extension + Loft + Renovation
Kitchen Extension, Loft and Refurbishment in E10
A kitchen extension, loft and refurbishment project, with a blue island beneath roof glazing and bathrooms with distinctive tile patterns.
What we take responsibility for
The details are ours to manage.
The decisions stay with you.
A successful loft conversion needs more than a finished room. The structure, staircase and connection to the home below all need careful coordination.
Clarify the design before the build
We work from your appointed architect’s and engineer’s designs, with the staircase, structural work and roof changes included in the agreed construction scope.
Coordinate the roof and the rooms below
We plan access and the sequence of opening up, structural work and weather protection. We discuss how the staircase connection and services will affect the existing home.
Keep the finishing stages connected
We coordinate insulation, windows, services and finishing within the agreed scope, alongside the relevant inspection stages. Your project lead keeps you informed about progress and decisions.
Your quotation sets out the work, exclusions and agreed coordination support. Bring your own architect or choose an independent architect we recommend; their professional appointment remains separate from our construction work.
Your quotation
Know what is included before we begin
Your quote explains the work, what it costs and the choices still to make. We talk it through with you, so you feel comfortable with the plan before work begins.
- Structural floor and roof work to the engineer’s design
- Staircase installation and connection to the existing landing
- Insulation, rooflights or dormer windows and weatherproofing
- Heating, electrics, plumbing and bathroom fitting within the agreed scope
- Plastering, joinery, decoration and handover checks
Design and construction
Your choice of architect. Support either way.
You need design support
If your project needs an architect, we can recommend one. They prepare the drawings. We help you understand what the options mean for the build and your budget, and can look after the conversations and follow-up questions. You choose the design and approve the cost.
You have your own architect
We are happy to work with them, whether your drawings are underway or complete. If you wish, we can speak with them on your behalf and keep the plans and building work moving together. You stay informed and make the decisions that matter to you.
Your architect prepares the drawings and agreed professional submissions; we manage construction. Our proposal sets out the coordination support you want, each appointment and the fees before you commit.
How we work
From your first ideas to feeling at home
01Tell us what you have in mind
We listen to what you want from your home, talk through your budget and explain the next steps. You do not need every detail decided.
02Make a plan you feel good about
We work through the drawings and choices with you and your design team, then agree the work, price and timing before building starts.
03Stay informed while we build
Your project lead updates you each week and explains any decisions you need to make. We check the finishing details with you and give you a clear aftercare contact.
Cost planning
A clearer picture of what it could cost
£45,000 to £130,000+ for larger conversions. Scope and specification determine the final price. Check the written quotation for VAT, professional fees, product allowances and contingency. Planning ranges are not a fixed offer.
- Professional fees and structural input often add 10% to 15% on top of the build cost.
- Party wall matters can add £1,000 to £3,000 per neighbour where required.
- Inner London boroughs often carry a 15% to 25% cost premium versus outer areas.
Built on trust
Care during the build. Support afterwards.
A clear route back to us after handover.
We complete a snagging review and provide the relevant handover documents. If something needs attention afterwards, raise a ticket in your client portal with the details and photographs. You can follow its status and add updates while we review the issue and coordinate the agreed next steps.
Our workmanship guarantee covers structural work, extensions and loft conversions for 10 years, bathroom and kitchen installations for 2 years, and decoration for 1 year. Item breakages are excluded from our workmanship guarantee and fall under the manufacturers’ own guarantees.
How our aftercare works →Plan your project
Apply the guidance to your home.
Explore the scope and investment for your loft conversion, then discuss the work your home needs. See our London service areas for local project information.
Useful to know
Questions you may be considering
How much does a loft conversion cost in London?
Larger London loft conversions sit between roughly £45,000 and £130,000+, depending on the type. Rooflight conversions start lower, at around £25,000 to £45,000, rear dormers are the most common, and mansards sit at the premium end because they usually involve more planning and structural change.
Do I need planning permission for a loft conversion?
Often not on standard houses, because many loft conversions can proceed under permitted development. But flats, maisonettes, listed homes, conservation-area properties, and mansard proposals usually need more planning work. We assess that early so you do not build assumptions on the wrong route.
How long does a loft conversion usually take?
The build phase is often around 8 to 16 weeks depending on the type, but the full journey including design, approvals, party wall matters and contractor scheduling is usually closer to 4 to 6 months.
What is the minimum head height for a loft conversion?
As a rule of thumb, you want around 2.2 metres from the top of the existing ceiling joists to the underside of the ridge. Borderline lofts may still work, but only after a proper feasibility check.
Can a loft conversion include an en-suite and fitted storage?
Yes. Many loft projects work best when the room, storage and bathroom are planned together rather than treated as separate add-ons later.
Will a loft conversion need a party wall agreement?
It often requires Party Wall notices where structural work affects a shared wall, although the exact position depends on the property and proposed details. We identify that early so notices can run alongside design and approvals rather than delaying the build start.
Can I keep my existing staircase?
The existing staircase can stay, but the loft normally needs a new permanent stair that connects into the current circulation. Its position must work with headroom, fire safety and the floor below. A poor stair position can cost more usable space than homeowners expect, so it should be resolved during feasibility.
What happens to the water tank in the loft?
If a cold-water tank occupies the conversion area, the plumbing strategy is reviewed before work starts. Depending on the existing system, it may be repositioned or replaced as part of a move to a different hot-water arrangement. That decision must account for pressure, capacity and the rest of the house.
Does a loft conversion need Building Regulations sign-off and fire doors?
Yes, a habitable loft conversion needs Building Regulations approval. The design must address structure, insulation, stairs, escape and fire protection. Depending on the house layout, that can include upgrading doors or the protected route from the loft to the final exit.
How disruptive is a loft conversion day to day?
Much of the early structural work can be accessed through the roof, which reduces traffic through the house. Noise, scaffolding and dust are still unavoidable, and internal disruption increases when the new staircase breaks through and services or finishes connect to the floors below.
Your next step
What would an extra room make possible?
Whether you have drawings ready or just the beginnings of an idea, we would love to hear about it. Tell us about your home and your budget, and we will help you work out a sensible next step.
From the blog
A little guidance for your next step.
Explore the costs, choices and practical details behind a project like yours.
