Rating: 4.9 from 212 Google reviews
Quality Loft Conversions & Home Extensions
London and the surrounding area
Explore what your loft could become and get an initial estimate for your project.
Our Work
10 Projects
Trusted by Homeowners
4.9 out of 5,
Honest from the first phone call. The survey was thorough, the quote was itemised and the loft was finished a few days early. Couldn’t recommend them enough.
Tidy, polite and always on time. We stayed in the house throughout and never felt in the way. The new bedroom feels like it was always part of the house.
Very happy with the finished room. A couple of small snags at the end, which they came back and sorted within the week. Would use them again.
Fair price, clear plan and no surprises. Our builder friends were impressed by the finish on the stairs and the windows.
Great communication from start to finish. They kept the house tidy every day and the loft was ready ahead of schedule. The new room has made a real difference to us.
What It Gives Back
You already own the space. Right now it holds boxes.
Nationwide, October 2025: a large double bedroom and bathroom, by loft conversion or extension, can add as much as 24% to a three-bed house. An estimate, not a promise.
Moving means stamp duty, agents, solicitors and removals. A loft adds the room and you keep the street you know.
Build up, not out. Your garden and the rooms downstairs stay exactly as they are.
Picture It
A main bedroom with its own shower room.
The old bedroom becomes a nursery, a spare or a study.
A proper room to work in.
Door shut, desk up, and the kitchen table is yours again.
Space for children to grow.
A room each, and a floor between them and the grown-ups.
Room for the people you love.
Visitors, a grown-up child back for a while, or a parent who needs to be close.
A space just for you.
A gym, a studio or a games room that is never in the way of family life.
Most houses with a pitched roof can be converted. The survey settles it.
About 2.2 metres of height across a good part of the floor is the usual guide.
Peace of Mind
It is a lot of money to hand to a builder.
The deposit is 10%, and it has insurance-backed deposit protection until work starts. After that you pay in stages, and each stage is paid only after the work has been checked. You never pay ahead of the work.
See How Payments WorkYou pay for each stage after it is checked, so what you have paid never runs ahead of what is built. If we fall behind, we tell you why in writing and set a new date. The finished work carries a 10-year insurance-backed guarantee, so it holds if we stop trading.
See What Protects YouYour price is fixed in writing after the survey. It only changes if you ask for extra work, or we find something we couldn’t see (like asbestos or rot), and only with your written OK first.
See the Guide RangesMost of the work happens in the roof, not in your rooms. You stay at home. We protect the stairs and hallway, the same small team is on site 8am to 5pm on weekdays, and we clear up every evening.
See What Happens, Stage by StageHow It Starts
Real Jobs, Real Prices
Planning: No Planning ApplicationWe were nervous about the dust and the disruption, but the team kept the house tidy every single day. The new bedroom and shower room are the best thing we have done to the house.
Planning: Planning Permission NeededThe price they gave us after the survey was the price we paid. Every stage was explained before it started, and the finish is better than we expected.
Planning: No Planning ApplicationOur two boys now have a room each. The same few people turned up every morning, which made all the difference with children in the house.
Guide Prices
Guide ranges by type of loft, based on our own finished jobs (last reviewed October 2026).
Roof windows set into your existing roof. The gentlest option, but it needs enough head height already.
Guide Range, inc VAT: £30,000 to £42,000 £27,000 to £38,000
A box built out of the back of the roof, giving proper standing room, floor space and a window.
Guide Range, inc VAT: £48,000 to £68,000 £43,000 to £61,000
A dormer that wraps around a rear extension, for houses with a back wing.
Guide Range, inc VAT: £60,000 to £85,000 £54,000 to £77,000
The sloping side of the roof is built up into a flat wall, adding room on a semi or detached house.
Guide Range, inc VAT: £55,000 to £78,000 £50,000 to £70,000
A flat-topped roof with a steep back slope. The most usable space, and usually needs planning permission.
Guide Range, inc VAT: £70,000 to £98,000 £63,000 to £88,000
Prices on this page include VAT at 20%. This is a guide range for homes like yours. It is not a quote. Your own price depends on your roof, your house and what you choose.
Structure, insulation, roof windows, stairs, electrics, plumbing, plastering, decorating and Building Regulations sign-off. A typical room of about 28 m² with one double bedroom and a bathroom, standard finish.
Council planning or lawful development certificate fees, party wall surveyor fees, architect fees for unusual designs, furniture and kitchen-style fit-outs.
After a survey you get a fixed price in writing, valid for 30 days. The price only changes if you ask for extra work, or we find something we couldn’t see, and only with your written OK first.
The Build
You pay in stages. Each stage is checked before the next one starts.
10%of the price, paid at this stage
Plans and price agreed in writing.
15%of the price, paid at this stage
Order confirmations and the scaffold inspection, checked by our site manager with you.
25%of the price, paid at this stage
Structural steel and floor frame inspected by building control.
25%of the price, paid at this stage
Roof, windows and weatherproofing signed off on site.
20%of the price, paid at this stage
Wiring and plumbing tested, plasterboard inspected.
5%of the price, paid at this stage
Completion certificate in your hands and snagging finished.
Every payment gets a receipt. Pay by bank transfer or card. 5% retention is held until the completion certificate is issued and snagging is done.
Your 10% deposit has insurance-backed deposit protection until work starts. It covers the deposit only: not stage payments, and not changes you ask for after signing. Stage payments are paid after each stage is checked.
A 10-year insurance-backed guarantee on our workmanship and materials. It holds if we stop trading or cannot put a fault right. It covers the finished work, not stage payments. Certificate at handover.
Employers’ liability, public liability and contract works. Certificates on request.
Under the Plaster
The main parts of a loft conversion, and what each one does.
Tap a label on the photo.
The box that gives you proper head height, plus the windows that bring light in. The shape depends on your roof, and sometimes needs planning permission.
The roof has to meet current standards for keeping heat in, so the new room isn’t freezing in winter or an oven in summer.
It sits behind the plasterboard, so once the room is finished you can’t see it. That’s why it’s worth asking how it’s done.
New circuits, lighting, sockets and heating for the room, tested and certified.
New rafters and roof timbers give the room its shape.
Old ceiling joists were never meant to be a floor. They’re strengthened or replaced so the new room doesn’t bounce or crack the ceiling below.
A new floor and an opened-up roof need support the old timbers weren’t built for. In most conversions a structural engineer works out the steel, and building control inspects it before it’s covered up.
In this loft the steel beams and new joists are in before the stud walls go up. They carry the new floor and the opened-up roof.
In England, in a typical two-storey house, the stairs up to a new loft room become part of your escape route, so they need fire-resisting walls and doors around them. Bungalows work differently (escape windows), and your surveyor and building control confirm what applies to your home.
That includes a fire-resisting door at the bottom of the new stairs, with the right frame and fittings. It stops smoke reaching your escape route.
If you share a wall with a neighbour, the Party Wall etc. Act 1996 (England and Wales) often means giving them notice before work starts.
Not in a photo:
General guidance for England. The details for your house are decided at survey and by building control.
It depends on your house and the type of loft. The guide ranges are above. They aren’t quotes. After a survey you get a fixed price in writing, valid for 30 days.
It depends on the type of loft. Each guide range above shows the weeks on site. From signing the contract to handover, most homes take three to four months.
In England, many loft conversions can be done under permitted development, but not all. The usual limits: 40 m³ of added roof space for a terraced house and 50 m³ for other houses, counting earlier enlargements; not in a conservation area or other protected land such as a National Park or Area of Outstanding Natural Beauty; not a flat or maisonette; nothing higher than the existing roof; and a set-back from the eaves (hip-to-gable is an exception). Some councils have removed these rights in particular streets. Your council decides. We advise on whether you need permission, and apply for it or for a lawful development certificate on your behalf.
Yes. In England you need Building Regulations approval to make a loft habitable, whether or not you need planning permission. It covers things like the stairs, fire safety and structure.
You can stay at home during the build. Expect some noise during the day, and we protect your stairs and hallway.
If you share a wall with a neighbour, you will often need to give them notice under the Party Wall etc. Act 1996, which applies in England and Wales. Notice is two months for work on a party structure. We serve the notices for you and manage the process. The neighbours’ surveyor fees are paid by you and are not included in our price.
In England, flats and maisonettes don’t have permitted-development rights for loft conversions, so planning permission is needed, and leaseholders normally need the freeholder’s written consent. In a conservation area the permitted-development right to extend the roof doesn’t apply, so a roof extension needs planning permission (smaller changes such as roof windows can be treated differently, and your council will tell you). Some other areas have extra “Article 4” rules. We only convert lofts in houses and bungalows at the moment.
Nationwide, in a UK-wide study, says a loft conversion or an extension that adds a large double bedroom and a bathroom can add as much as 24% to the value of a three-bedroom house with one bathroom (Nationwide, October 2025). That’s an estimate based on a 28 m² addition, not a guarantee, and it isn’t specific to lofts.
Your Next Step
Tell us a little about your project to get started. You see your guide range before we ask for your number.
