Loft Conversion Manchester | Fixed Prices, Free Survey

Q: How much does a loft conversion cost in Manchester?

A Velux conversion starts from £28,000–£40,000. A rear dormer runs £35,000–£55,000. A hip-to-gable conversion costs £45,000–£65,000. A mansard conversion starts from £55,000+. All prices include structural engineer and building regulations.

Q: Do I need planning permission for a loft conversion in Manchester?

Velux conversions are always Permitted Development. Rear dormers and hip-to-gable conversions are usually Permitted Development. Mansard conversions always require planning permission. Conservation area properties in Chorlton and Didsbury may have restricted PD rights.

Q: How long does a loft conversion take in Manchester?

Velux conversions take 4–6 weeks. Rear dormers 6–9 weeks. Hip-to-gable 8–11 weeks. Mansard 10–14 weeks. Add 8–10 weeks if planning permission is required.

Q: Is my Manchester house suitable for a loft conversion?

Most pre-1960 Manchester houses are suitable. The key requirement is a minimum 2.2m head height from ceiling joists to the ridge beam, which most Victorian terraces and 1930s semis in Greater Manchester meet. Our free loft assessment checks feasibility at no charge.

Quick Answer

A loft conversion in Manchester costs £28,000–£65,000+ depending on type: a Velux conversion starts from £28,000–£40,000, a rear dormer runs £35,000–£55,000, and a hip-to-gable or mansard conversion typically costs £45,000–£65,000+. All prices include structural engineer and building regulations.

About This Service

Loft Conversion in Manchester — What You Need to Know First

A loft conversion is the most cost-effective way to add a bedroom, home office or en suite to a Manchester home without moving or extending outwards. The average loft conversion in Greater Manchester adds 20–25% to a property's market value — significantly more in sought-after areas like Didsbury and Chorlton where space is at a premium and demand from growing families is strong.

Not every loft is automatically convertible. The critical first check is head height — you need a minimum of 2.2m from the top of the floor joists to the ridge beam for a habitable conversion. Most of Greater Manchester's Victorian and 1930s housing stock meets this requirement comfortably, but it varies. Our free loft assessment includes a head height check, structural joist assessment, roof pitch measurement and an honest feasibility verdict before you commit to anything.

We handle the entire project in-house — structural engineer liaison, planning permission applications where needed, building regulations, steelwork, carpentry, plumbing, electrics and full fit-out. One project manager, one fixed price, no subcontractors passing the job between them.

✎ Quick Facts

Starting from £28,000

Typical duration 6–12 weeks

Min. head height 2.2m required

Planning permission Often not needed

Value added 20–25% typical

Guarantee 10 years

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Conversion Types

Loft Conversion Types Available in Manchester

The right conversion type depends on your roof structure, planning context and budget. Here are the four main types we build across Greater Manchester — and which properties they suit best.

Dormer Loft Conversion

A box-shaped extension projecting from the roof slope, creating a vertical rear wall and flat or pitched roof. The most popular conversion type across Greater Manchester — it works on virtually every property type and dramatically increases usable floor space and head height. Rear dormers usually fall under Permitted Development on terraced and semi-detached homes.

From £35,000Typical cost

6–9 weeksDuration

Often PDRear dormer

Most Affordable

Velux / Rooflight Conversion

The simplest conversion — no structural changes to the roof profile, just rooflight windows installed in the existing slope. Works best where the existing head height is already sufficient (most pre-1940 Manchester houses). Almost always Permitted Development, no planning application needed, and the most cost-effective route to a new room.

From £28,000Typical cost

4–6 weeksDuration

Always PDNo planning

Semi-Detached Specialist

Hip-to-Gable Conversion

Transforms the sloping hip end of a semi-detached or detached roof into a vertical gable wall, significantly expanding the usable floor area. Very common on 1930s semis across Sale, Stretford, Altrincham and Didsbury. Often combined with a rear dormer for maximum space. Hip-to-gable conversions typically fall under Permitted Development on detached and semi-detached homes.

From £45,000Typical cost

8–11 weeksDuration

Often PDDetached/semi

Maximum Space

Mansard Conversion

The most ambitious conversion type — nearly vertical rear wall (typically 72° pitch) with a flat roof, creating the maximum possible floor area. Often involves replacing most of the rear roof structure. Mansard conversions always require full planning permission, but they deliver the greatest increase in habitable space and are particularly suited to end-of-terrace properties in Levenshulme, Chorlton and Withington.

From £55,000Typical cost

10–14 weeksDuration

Planning neededAlways required

What's Included

Everything Covered in Your Fixed Quote

From structural engineer to final coat of paint — every element your loft conversion needs, in-house, under one contract.

📝

Design, Planning & Building Regs

We handle all paperwork, applications and approvals — so you don't have to deal with the council, building control or structural engineer directly.

Structural engineer calculations
Planning permission application where needed
Building Regulations application and sign-off
Party wall notices if applicable

🛠

Structural Steelwork

All structural steel beams (RSJs), padstones and timber structural alterations installed and inspected. The foundation of every safe loft conversion.

Steel beam procurement and installation
Floor joist doubling and strengthening
Ridge beam installation (where required)
Building control structural inspection

🏠

Roof Structure & Weatherproofing

Dormer frame construction, roofing, lead work, window installation and full weatherproofing — making your loft watertight before any internal work begins.

Dormer or mansard frame construction
Roofing felt, batten and tile/slate
Lead flashing and valley work
Velux or dormer window installation

⚡

Plumbing & Electrics

First and second fix plumbing (essential for en suite lofts) and full electrical installation — lighting, sockets, data points and fire detection to Building Regs standard.

En suite plumbing — supply and waste
Mains-linked smoke detector installation
Full electrical first and second fix
Lighting design and socket layout

📄

Insulation & Boarding

All insulation installed to current Building Regulations U-values — floor, walls and roof. Plasterboarding to all surfaces ready for plastering and decoration.

Floor insulation and sound deadening
Roof and wall insulation to regs spec
Full plasterboarding throughout
Access hatch or staircase installation

🏛

Full Fit-Out & Staircase

Plastering, decoration, flooring and staircase installation — everything needed to hand over a fully finished, move-in-ready loft room.

Plaster skim to all walls and ceilings
Loft staircase design and installation
Flooring — carpet, LVT or engineered wood
Full decoration — walls, ceiling, woodwork

Planning Permission

Do You Need Planning Permission for a Loft Conversion in Manchester?

The answer depends on your conversion type and property. Here's a clear breakdown — and we confirm your specific situation at your free assessment.

✓ Permitted Development

These conversions usually don't need planning permission

Rear dormer on a terraced or semi-detached house (staying within PD size limits — 40m³ terraced, 50m³ detached)
Velux / rooflight conversions on any property type
Hip-to-gable conversion on detached and semi-detached homes
Any conversion that doesn't raise the ridge height
Any conversion that uses matching roof materials to the existing property

✗ Planning Permission Required

These conversions always need a planning application

Mansard conversions — all property types, all locations
Front dormers visible from the highway
Any conversion in a conservation area (common in Chorlton and Didsbury)
Conversions that exceed Permitted Development volume limits
Properties where PD rights have been removed (check your title deeds)

We handle all planning applications on your behalf — including conservation area applications in South Manchester. You don't need to contact the council directly. Planning permission is included in your fixed quote where required, and our approval rate on Manchester loft conversion applications is excellent.

Our Process

How Your Loft Conversion Works — Week by Week

A clear, sequenced process from your first call to handover of a fully finished loft room.

1

Free Loft Assessment

We visit and check the essentials: head height from joists to ridge, roof pitch, existing joist size and span, tank and water storage positions and access options for a new staircase. We give you an honest verdict on feasibility and the most suitable conversion type for your home — all at no charge.

Day 1 — Free, no obligation

2

Design, Quote & Planning Application

We produce architectural drawings, commission structural engineer calculations and submit your planning application where needed. Your fixed-price quote — fully itemised to every trade and material — is issued within 48 hours of the assessment. We handle all council correspondence. Manchester City Council and the surrounding borough councils typically decide loft conversion applications within 8 weeks.

Weeks 1–9 (planning applications) or immediately (PD)

3

Materials Ordered & Programme Issued

On approval (or immediately for Permitted Development conversions) we order all structural steel, timber, windows and materials. You receive a week-by-week programme so you know exactly when the roof is open, when it's weathered in and when each room will be finished.

Week 1 of build programme

4

Structural Work & Roof

Steelwork installed and inspected. Existing roof structure modified and new dormer or mansard frame constructed. Roofing completed, windows fitted and the new space made fully weathertight. Building control inspection of structural elements passed before internal works begin.

Weeks 2–5 of build

5

First Fix, Insulation & Boarding

First fix electrics and (where applicable) plumbing routed. Floor insulation and sound deadening installed. Roof and wall insulation fitted to Building Regulations thermal spec. Full plasterboarding throughout. Building control insulation inspection completed.

Weeks 5–8 of build

6

Plastering, Second Fix & Fit-Out

Plaster skim applied and dried. Second fix electrics (sockets, lighting, smoke detectors). En suite bathroom installation (where included). Staircase fitted. Flooring laid. Decoration complete. Full snagging walk-through with you before we hand over the finished space.

Weeks 8–12 of build

7

Building Regs Sign-Off & Guarantee

Final building control inspection completed and Completion Certificate issued. Your 10-year workmanship guarantee certificate issued. The loft is yours — a fully legal, Building Regulations compliant new room that adds genuine market value to your Manchester home.

Final week — Completion Certificate issued

Pricing Guide

Loft Conversion Cost in Manchester

Honest price ranges based on 150+ loft conversions completed across Greater Manchester. Prices include all labour, structural engineer and building regulations — materials vary by specification.

Velux / Rooflight

£28,000 – £40,000

🕑 4–6 weeks · Always Permitted Development

Structural floor strengthening
Velux or rooflight windows
Full insulation to regs
Plasterboard, skim and decoration
Electrics & lighting
Loft staircase

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Loft Conversion Manchester — Your Questions Answered

How much does a loft conversion cost in Manchester?+

Based on 150+ loft conversions completed across Greater Manchester: a Velux or rooflight conversion starts from £28,000–£40,000. A rear dormer runs £35,000–£55,000. A hip-to-gable conversion typically costs £45,000–£65,000. A mansard conversion starts from £55,000 and can exceed £80,000 for larger properties. All prices include structural engineer, building regulations and project management. Your exact fixed quote is based on your free assessment.

How long does a loft conversion take in Manchester?+

A Velux conversion typically takes 4–6 weeks on site. A rear dormer runs 6–9 weeks. A hip-to-gable conversion takes 8–11 weeks. A mansard conversion typically takes 10–14 weeks. If planning permission is required (mansard or front dormers), add 8–10 weeks for the planning process before work begins. We provide a week-by-week programme before any work starts.

Do I need planning permission for a loft conversion in Manchester?+

It depends on the conversion type. Velux conversions are almost always Permitted Development. Rear dormers on terraced and semi-detached properties are usually Permitted Development provided they stay within the 40m³ (terraced) or 50m³ (detached) volume limit. Hip-to-gable conversions are usually Permitted Development on detached and semi-detached homes. Mansard conversions always require full planning permission. Conservation area properties in parts of Chorlton and Didsbury may have restricted PD rights — we check this at your free assessment.

Is my Manchester house suitable for a loft conversion?+

Most pre-1960 Manchester houses — Victorian terraces, Edwardian houses, 1930s semis — are suitable for some form of loft conversion. The key requirement is a minimum head height of 2.2m from the top of the ceiling joists to the underside of the ridge beam. This is met by the majority of Greater Manchester's pre-war housing stock. Our free loft assessment checks head height, roof pitch, joist size and staircase access, and gives you an honest feasibility verdict before you spend anything.

Can you add an en suite bathroom to a loft conversion?+

Yes — a loft bedroom with an en suite bathroom is the most popular configuration we build across Greater Manchester. The en suite is included in your fixed quote and typically adds £8,000–£12,000 to the base conversion cost depending on specification. We handle all plumbing routing from the existing stack, extraction and all tiling and sanitary ware installation. The combination of a new bedroom and en suite typically adds the most value to a Manchester property.

Do you handle the building regulations sign-off?+

Yes — Building Regulations approval and the final Completion Certificate are included as standard in every loft conversion we carry out. Building control inspectors visit at key stages (structural steelwork, insulation, fire detection, final inspection) and we liaise with them directly. You receive your Completion Certificate on handover — this is the document you'll need when you sell your home, so it's important that it's in order.

What areas of Manchester do you cover for loft conversions?+

We cover all Greater Manchester postcodes — Didsbury (M20), Chorlton (M21), Salford (M5–M7), Stockport (SK1–SK6), Altrincham (WA14–WA15), Sale (M33), Stretford (M32), Urmston (M41), Levenshulme (M19), Withington (M20), Wythenshawe (M22–M23) and Trafford (M16–M17). If you're unsure whether we cover your area, call or contact us and we'll confirm immediately.

Loft Conversion Manchester — Turn Your Unused Loft Into Living Space

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