We design, plan and build loft conversions across Chelsea and the wider Kensington and Chelsea borough — one team, one fixed price, one project manager from sketch to handover.
Typical scope 22–45m² added
Cost guide £60k–£140k typical
Build time 8–14 weeks
Consult Free 1–2 hour visit
BUILDING IN CHELSEA
Chelsea's Georgian and Victorian townhouses demand conservation-grade work — our completed luxury apartment refurbishment in Chelsea shows the finish level we hold. Extensions, remodels and full refurbishments by one in-house team, at a fixed itemised price.
Mansard and rear-dormer loft conversions add a floor without altering a protected street elevation — designed to sit correctly within the roofline and the planning constraints typical of the area.
Local advantage
Why homeowners in Chelsea choose Dali Pro Services for loft conversions
01 · PLANNING HANDLED
Volume limits, dormers and conservation streets — checked before you commit.
Most lofts in Chelsea convert under permitted development if the added volume stays within the limits; where the route changes, the application goes to Kensington & Chelsea Council. The classic terrace route here is a rear dormer or an L-shape over the outrigger — usually within permitted-development volume limits. We measure head height on the first visit, confirm feasibility honestly and handle whichever consent applies.
02 · ONE TEAM
Staircase, steels and headroom — decided on the drawings, not on site.
A loft stands or falls on three decisions: where the staircase lands, how the steels carry the new floor, and where the full-height space goes. Because design and build are one in-house team, those calls are made once, on the drawings — never improvised mid-build.
03 · TRANSPARENT PRICING
£60k–£140k typical — itemised and fixed.
Your quotation is broken down line by line — structure, dormer, glazing, bathroom, finishes — and fixed against the agreed drawings. You pay in stages, only after each stage is signed off; variations only happen when scope genuinely changes, through written authorisation.
Yes — Chelsea (SW3) is well within our Kensington and Chelsea working area. We deliver several loft conversion projects across this borough each year.
How long does a loft conversion project take in Chelsea?
On site, the build phase is typically 8–14 weeks. Add time up front for design, planning approval and structural sign-off — we give you a firm end-to-end programme with the fixed quote after the free site visit.
What does a loft conversion cost in Chelsea?
Typical range: £60k–£140k typical. Our online calculator gives you a tighter figure based on your house type and ambitions; the fixed quote follows a free site visit.
Will I need planning permission in Chelsea?
It depends on the property. Many loft conversions fall under permitted development; where a full application to Kensington & Chelsea Council is needed (conservation areas, listed properties, larger schemes), we prepare and submit it end-to-end.
How tall must my loft be to convert?
You need at least 2.2m of head height in the existing loft. We measure on the first visit and confirm what conversion fits.
Will the build be disruptive?
Most of the work happens upstairs, with rooflight access for materials. You stay in your home throughout.
How long does a loft conversion take?
Standard dormer: 8–10 weeks. Mansard: 12–14 weeks. Faster than most extensions.
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