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Fixed Price
Guaranteed
Delivery
6–10 Weeks
Designer Collections
Included
Design Fees
£0
Workmanship
6-Year Guarantee
By
Masterpiece Construction
Dormer Loft Conversions
What Is a Dormer Loft Conversion?
A dormer loft conversion adds a vertical extension — a dormer roof extension — to your existing roof slope, creating full-height walls, a proper floor, and significantly more natural light.
This type of loft conversion with dormer windows is London’s most popular choice, particularly on Victorian and Edwardian terraces across Zones 2–5. A rear dormer typically qualifies for permitted development — no planning permission required.
Is a Dormer Right for Your Property?
- ✓At least 2.2m headroom at the ridge (highest point of roof)
- ✓Victorian or Edwardian terrace, semi-detached, or detached house
- ✓Traditional timber-framed roof structure
- ✓Rear elevation — not in a conservation area (or willing to apply)
We confirm feasibility during your free survey — no commitment required.
Why My Loft
Why Choose My Loft for Your Dormer Conversion?
Design-Led Lofts, Fixed Price, Zero Stress
No Design Fees
Designer Collections Included
Six signature collections by named interior designers — complete schemes covering layout, materials, furniture, lighting, and finishing touches. Included in every project at no extra cost.
Price Guarantee
Fixed Pricing from Day One
The price we quote is the price you pay. No hidden costs, no provisional sums, no "we'll see on site" surprises. You know exactly what you're getting before you commit.
Fast Build
6–10 Week Delivery
Systematised processes, pre-designed collections, materials ordered in advance. No design delays. Dedicated teams who know our workflow — delivering faster without cutting corners.
Masterpiece Construction Quality
My Loft is part of the Masterpiece Construction family. The same commitment to craftsmanship and quality — applied to a streamlined, fixed-price loft conversion service.
Everything Managed for You
Named project manager from survey to handover. Building regulations, party wall notices, and all trades coordination handled. Weekly photo updates. 6-year workmanship guarantee.
Everything Included in Your Fixed Price
✓Structural design by chartered engineer
✓Your chosen designer collection
✓Building regulations approval & sign-off
✓Bespoke fitted under-eaves storage
✓Party wall agreements handled
✓En-suite or shower room — complete spec
✓Complete electrics, heating & ventilation
✓Staircase design & installation
✓Named PM, weekly updates & coordination
✓6-year workmanship guarantee
Designer Collections
Six Signature Collections. No Design Fees. No Guesswork.
Three interior designers have created six complete loft schemes — each covering layout, colours, materials, furniture, lighting, and every finishing detail.
Olivia Hart Collection
Serene
Scandi-minimal · Warm whites, pale oak, soft grey · Master bedroom retreat
From £70,000
Olivia Hart Collection
Bold
Contemporary · Charcoal, terracotta, brass · Creative office / guest room
From £75,000
James Chen Collection
Heritage
Modern classic · Warm greys, deep greens, natural wood · Master bedroom + dressing
From £78,000
James Chen Collection
Urban
Industrial-modern · Black, white, concrete grey, steel · Home office / studio
From £72,000
Priya Sharma Collection
Family
Playful · Soft pastels, natural woods, white · Nursery / playroom
From £70,000
Priya Sharma Collection
Haven
Calm retreat · Stone, linen, warm timber, botanical · Bedroom sanctuary
From £74,000
Timeline & Process
Building a Dormer Loft Conversion: What to Expect
Build Timeline — 6–10 Weeks
Wks 1–2
Structural Phase
Scaffold, roof opening, steelwork, dormer frame construction.
Wks 3–4
Weathertight
Dormer roof completed, windows installed, fully weatherproofed.
Wks 5–7
First Fix Interior
Insulation, plasterwork, electrics, heating, staircase.
Wks 8–10
Fit-Out & Handover
Fitted furniture, en-suite, decorating, lighting, snagging, handover.
Why We're Faster
Pre-designed collections eliminate the design phase. Materials pre-ordered before day one. Dedicated teams, strong building control relationships, fixed scope — no mid-project changes.
From Enquiry to Handover — 8 Steps
01
Online Discovery
Browse collections, use pricing calculator. No pressure.
02
Consultation Call
20-minute call within 24 hours. Confirm suitability, book survey.
03
Free Property Survey
Within 7 days. We measure, assess, confirm planning. 45–60 min.
04
Fixed Price Proposal
Within 48 hours. Full spec, visualisations, payment schedule. Guaranteed.
05
Pre-Construction
Building control, party wall notices, materials ordering — all handled by us.
06
Structural Build
Weeks 1–5: scaffold, steelwork, dormer frame, roofing, weatherproofing.
07
Interior Fit-Out
Weeks 6–10: plastering, flooring, fitted furniture, en-suite, decorating.
08
Handover & Aftercare
Final walkthrough, all warranties, building regs certificate. 4-week check-in call.
Transparent Pricing
Dormer Loft Conversion Cost: £70,000–£100,000
Fixed pricing means the quote confirmed after your survey is the price you pay. No hidden costs, no provisional sums.
Example Cost Breakdown — £80,000 Project
| Element | Typical Range |
|---|---|
| Structural work & dormer build | £28k–£32k |
| Fitted furniture & storage | £8k–£12k |
| En-suite (standard specification) | £10k–£15k |
| Services — electrics & heating | £6k–£8k |
| Staircase | £4k–£6k |
| Plasterwork & flooring | £5k–£7k |
| Building control, PM & guarantees | £8k–£11k |
All costs include building regulations fees (£800–£1,200) and project management. Updated February 2026.
Return on Investment
Property value (example)
£800,000
Conversion cost
£85,000
Value after conversion
£920k–£960k
Net gain
£35,000–£75,000
Financing Options
Remortgage / Equity Release
Most common · Lowest rates · 2–5% APR
Home Improvement Loan
Faster approval · 4–9% APR · Up to £100k
Milestone Payment Plan
10% deposit → 30% Wk 2 → 30% Wk 5 → 25% Wk 7 → 5% on handover
Instant Estimate
How Much Will Your Loft Conversion Cost?
Configure your options for an instant budget estimate. A fixed price is confirmed after your free survey.
Your Budget Estimate
£70,000 – £78,000
Fixed price confirmed after free survey
Planning & Compliance
Planning Permission & Building Regulations
Most loft conversions in London fall under permitted development — no planning permission required. We manage the entire building control process, from submission to final sign-off.
Building Regulations — What We Cover
S
Structural Integrity
Load-bearing calcs, steel beam specs, floor joist strengthening.
F
Fire Safety
Escape routes, 30-min fire-rated doors, smoke alarms, window specification.
I
Insulation
U-value 0.15 W/m²K or better. Airtightness, condensation control.
A
Staircase & Acoustics
Max 42° pitch, 2m headroom, acoustic insulation in floors and party walls.
Completed Projects
View All Projects →
Design-Led Loft Conversions Across London
Serene Collection, Richmond
Victorian terrace · 7 weeks · £78,000
Bold Collection, Islington
Edwardian semi · 8 weeks · £92,000
Family Collection, Chiswick
Victorian terrace · 6 weeks · £72,000
“We couldn’t afford a designer and a builder separately. My Loft meant we got a beautifully designed space at the same price we’d budgeted for a basic conversion.”
Sarah & James
Richmond · Serene Collection
“The fixed pricing gave us total peace of mind. Weekly photo updates, on budget, on time. The Bold collection has so much personality — it’s become our favourite room.”
Priya & Michael
Islington · Bold Collection
“Three months before our due date, My Loft delivered on time and created a nursery more beautiful than we could have designed ourselves.”
Emma & Tom
Chiswick · Family Collection
All Loft Conversion Types
Not Sure Which Conversion Is Right for You?
We'll confirm the best solution for your property during your free survey. Browse all conversion types below.
Most Popular
Dormer
Vertical extension from roof slope. Maximum headroom and floor area. Suits most London terraces.
From £70,000
Current page
Hip-to-Gable
Extends hipped roof to a vertical gable wall. Significant space gain for semi-detached properties.
From £75,000
Learn about Hip-to-Gable
Velux / Roof Light
Adds roof windows without altering the roofline. Most affordable option where headroom is sufficient.
From £55,000
Learn about Velux
Mansard
Near-vertical rear walls and flat roof. Maximum volume — common in central and inner London.
From £80,000
Learn about Mansard
L-Shaped Dormer
Rear dormer over a rear extension. Maximum space on Victorian terraces with rear additions.
From £85,000
Learn more
Areas We Serve
Loft Conversions Across London — Zones 2–5
We work across all London boroughs. Find your area for local pricing, planning notes, and recommended collections.
Richmond
Islington
Hackney
Haringey
Waltham Forest
Lewisham
Greenwich
Wandsworth
Lambeth
Southwark
Tower Hamlets
Newham
Wandsworth
Battersea, Tooting, Balham. High-value Victorian stock — strong ROI on loft conversions.
Typical cost: £78k–£100k
View Wandsworth →
Islington
Multiple conservation areas — Barnsbury, Canonbury. We advise on planning status from day one.
Typical cost: £80k–£100k
View Islington →
Haringey
Crouch End, Muswell Hill — excellent Victorian and Edwardian terraces. Well-suited to dormer conversions.
Typical cost: £72k–£92k
View Haringey →
FAQs
Dormer Loft Conversion: Common Questions
How much does a dormer loft conversion cost?
£70,000–£100,000 all-in with My Loft. Fixed price confirmed after free survey. Includes structural work, designer collection, en-suite, fitted furniture, project management, and a 6-year workmanship guarantee. No hidden costs.
How much value does a dormer add to my home?
Typically 15–20% in London. A £800k property with an £85k conversion often reaches £920k–£960k, creating a net gain of £35k–£75k — plus years of enjoyment before any sale.
Can I finance a dormer loft conversion?
Yes. Options include remortgage or equity release (2–5% APR), home improvement loans (4–9% APR, up to £100k), or our milestone payment plan. We provide full cost breakdowns to support mortgage or loan applications.
Do I need to hire an interior designer separately?
No. Every My Loft project includes a complete signature collection by a named interior designer — at no extra cost. Each scheme covers layout, colours, materials, furniture, lighting, and finishing touches.
Can I customise a designer collection?
Collections are pre-designed systems — this is what keeps delivery efficient and pricing fixed. Choose from 6 styles, select en-suite specification, and add optional upgrades. Minor palette adjustments are possible. Fully bespoke design is available through Masterpiece Construction (£250k+ projects).
Do I need planning permission for a dormer extension?
Most rear dormers don't — they qualify under permitted development. Planning is required for front or side dormers, conservation areas, listed buildings, and Article 4 direction areas. We confirm your planning status at survey and handle any applications needed.
What about party walls in a terraced house?
The Party Wall Act 1996 applies where work affects shared walls. We serve all notices, handle agreements, and appoint surveyors if needed. Surveyor costs (if required, £700–£1,500) are included in your fixed quote.
How long does a dormer loft conversion take?
6–10 weeks from contract to handover. We're faster because pre-designed collections eliminate the design phase, materials are pre-ordered, and dedicated teams know our workflow inside out. Quality is maintained through Masterpiece Construction standards, a named PM, and weekly progress updates.
Will I need to move out?
No — 95% of our clients stay throughout the build. Some choose to stay elsewhere during weeks 1–2 (structural phase) if very noise-sensitive or with very young children, but it isn't required. Your home remains fully functional throughout.
Which properties cannot be converted?
Properties with insufficient headroom (below 2.2m ridge height), modern truss roofs (unless modified at +£10–15k), poor structural condition, or complex multi-valley roofs. We assess honestly at survey — 95% of London Victorian and Edwardian terraces are suitable.
What guarantees do you provide?
6-year workmanship guarantee, manufacturer warranties on all products, building regulations completion certificate, fixed-price guarantee, 6–10 week timeline commitment, and a 4-week post-completion check-in call.
Ready to Transform Your Home?
Book a free survey. We visit your property, confirm feasibility, and deliver a fixed-price proposal within 48 hours. No commitment required. No pressure.
