Loft Conversion London | Expert Loft Conversions in North London

Considering a loft conversion in North London? Fixiz coordinates feasibility, design, structural and construction stages for dormer, hip-to-gable, Mansard, L-shaped and rooflight conversions. Start with a feasibility review to understand the likely options, constraints and next steps for your property.

Why Choose Fixiz for Your Loft Conversion in London?

                                                                                    Dormer loft conversion London 

Fixiz delivers managed loft-conversion projects across North London. Our construction team and project managers work to an agreed scope, itemised quotation and project programme, coordinating the agreed design, structural and Building Control stages.

Our Loft Conversion Services Include:

• Dormer Loft Conversions — The most popular choice, adding significant headroom and floor space
• Hip to Gable Conversions — Ideal for semi-detached and end-terrace properties
• Mansard Loft Conversions — Maximum space with a distinctive flat roof design
• Velux/Rooflight Conversions — Cost-effective option using existing roof structure
• L-Shaped Loft Conversions — Perfect for Victorian and Edwardian terraced houses

Loft Conversion Cost in London 2026

Indicative 2026 loft-conversion costs generally range from £35,000 to £75,000+ excluding VAT, depending on conversion type, structural requirements, specification and access. The figures below are a guide, not a quotation:

Type	Indicative Cost (ex VAT)
Velux/Rooflight	£35,000 – £45,000
Dormer	£45,000 – £60,000
Hip to Gable	£50,000 – £65,000
Mansard	£55,000 – £75,000

Following the feasibility visit and scope review, we provide an itemised quotation priced against the agreed scope, specification and stated exclusions. Estimate your budget in 60 seconds or request a loft feasibility review.

Do I Need Planning Permission for a Loft Conversion?

Many loft conversions can proceed under Permitted Development, subject to the property type, roof alterations, volume limits and local restrictions. Building Regulations approval is required. Planning permission or a lawful development certificate may also be appropriate.

• Building Regulations approval
• Party Wall notices where the proposed work affects a shared wall or structure
• Structural calculations

Where included in the agreed scope, we coordinate drawings, structural calculations, planning or lawful-development applications, Building Control and relevant inspections.

The Loft Conversion Process

1. Feasibility Review — We assess the property type, roof, approximate headroom, intended use, budget and preferred timescale
2. Design & Planning — We coordinate the agreed drawings and planning route for your approval
3. Building Regulations — We coordinate the agreed structural information, Building Control application and inspections
4. Construction — Typically 6–10 weeks, depending on complexity and the agreed programme
5. Completion — Final inspection, agreed snagging and handover documentation

Areas We Cover for Loft Conversions

We provide loft conversion services across North London and selected nearby areas, including:

• North London (N11, N12, N13, N14, N20, N21)
• Barnet, Enfield, Haringey, Hackney
• Camden, Islington, Brent, Waltham Forest

Request a Loft Feasibility Review

Tell us your postcode, property type, approximate headroom, intended room use, preferred timescale and budget. Add photos or drawings if available so we can assess the likely next step before arranging a visit. START YOUR LOFT FEASIBILITY REVIEW Fixiz Ltd – Your trusted loft conversion specialists in London. Explore our other property conversion services: garage conversion and house extension. We also offer comprehensive construction and renovation services across North London.

How Much Value Does a Loft Conversion Add?

A well-designed, compliant loft conversion can add usable floor area and may improve property value. Any uplift depends on location, design, build quality and local demand, so obtain a local valuation before relying on an estimated return. The most reliable value comes from a layout that suits the property, meets Building Regulations and is supported by the correct completion documentation. Fixiz coordinates the agreed construction and Building Control stages; the exact scope is confirmed in your quotation.