HRHEADROOM 020 8127 4488

SW18 · EST. 2013 · 480 CONVERSIONS

Loft conversions,
built once,
built properly.

Dormer, hip-to-gable, L-shape and mansard, across south-west London. Fixed price contract before we begin. ARB-registered architect on every project.

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A new zinc-clad dormer loft conversion on a Victorian terraced house in Wandsworth, viewed from the rear garden.
PROJECT 0476 Dormer, Magdalen Road SW18, completed Q3 2025.

01 Before. After.

Every conversion starts with an empty roof void and a hatch. This is project 0473, a 6 week dormer in Earlsfield.

Unconverted Victorian loft attic, raw rafters, chimney stack, hatch and ladder.
BEFORE Week 0. Existing roof void.
Finished loft bedroom with vaulted white ceiling, exposed beam, large skylight, oak floor, low timber bed.
AFTER Week 6. Master bedroom suite, en-suite to the rear.

02 Four types. One specialism.

We do not extend kitchens. We do not knock through. We do lofts, and we do four kinds of loft.

Dormer

FROM £48k

A flat-roof extension off the rear of the existing roofline. Most common option on Victorian terraces. Adds a double bedroom and bathroom. Typically 6 weeks.

  • SIZE 18 to 28 m2
  • PLANNING Permitted development on most properties
  • DURATION 5 to 7 weeks

Hip-to-gable

FROM £62k

Replaces a sloped side roof with a vertical gable wall. Adds a meaningful amount of head height in semi-detached and end-of-terrace homes. Often paired with a rear dormer.

  • SIZE 22 to 34 m2
  • PLANNING Permitted development with conditions
  • DURATION 7 to 9 weeks

L-shape dormer

FROM £74k

An L-shape rear extension wrapping around the rear closet wing. Suited to Victorian terraces with rear projections. Gets you two bedrooms and a bathroom in one go.

  • SIZE 30 to 42 m2
  • PLANNING Permitted development on most properties
  • DURATION 8 to 11 weeks

Mansard

FROM £92k

A full reconstruction of the roof at 70 degrees, slate clad with lead flashings, three dormer windows. Maximum volume. The right choice for period properties in conservation areas.

  • SIZE 32 to 48 m2
  • PLANNING Full planning permission, conservation officer consultation
  • DURATION 10 to 14 weeks

03 The process. Ten steps.

From the first site visit to the snagging revisit at six months. Twelve to twenty weeks end to end, depending on type.

  1. 01

    Site visit

    Free, 45 minutes, on your roof, by Jamie or Anya. Measured up, walked through the options.

  2. 02

    Fixed price

    Within 5 working days of the site visit. One number, broken out by stage. No re-quoting later.

  3. 03

    Architect drawings

    By our in-house ARB-registered architect. Includes planning drawings and building regs structural set.

  4. 04

    Planning or PD

    We file. We chase. We deal with the planning officer. Most projects are permitted development, typical turn-around 8 weeks.

  5. 05

    Party wall

    We serve notices, agree awards, and pay for the adjoining surveyor where required. Included in the fixed price.

  6. 06

    Pre-start meeting

    A week before we lift the first tile. We agree access, parking, skip placement, working hours, dust protocol.

  7. 07

    Build

    One project manager, one lead carpenter, on site every day. Weekly written update with photographs.

  8. 08

    First fix

    Structure, insulation, electrics, plumbing first fix. Building control inspection at this stage.

  9. 09

    Second fix and finish

    Plastering, joinery, decoration, final fix electrics and plumbing. Final building control sign-off.

  10. 10

    Snagging at six months

    We come back. Anything that has moved, settled, or wants adjusting, we do. No charge, no quibble.

A loft conversion under construction, exposed steel beam ridge, timber stud framing.
PROJECT 0481 First fix, week 3. Hip-to-gable in Putney SW15.

04 What's in the price.

  • ✓ All architectural drawings, planning and building regs
  • ✓ Structural engineer calculations and sign-off
  • ✓ Planning application fees
  • ✓ Party wall notices, awards, adjoining surveyor
  • ✓ Skip licence and skip hire across the build
  • ✓ Scaffold for the duration of the build
  • ✓ Building control fees and inspections
  • ✓ All structural steel, timber, insulation, finishes
  • ✓ Three velux skylights as standard, more as needed
  • ✓ First and second fix electrics and plumbing
  • ✓ Plastering, painting, oak engineered floor
  • ✓ 10 year structural guarantee, 6 month snagging revisit

05 Recent work.

Finished L-shape loft conversion office, exposed black steel, oak desk in dormer, leather chair.

SW18 · Magdalen Road

L-shape dormer · 42 m2 · 10 weeks · £79,400

Loft conversion bathroom with black freestanding bath under skylight, brass shower, charcoal walls.

SW15 · Hazlewell Road

Hip-to-gable · 31 m2 · 8 weeks · £68,200

Completed mansard loft conversion exterior, slate cladding, three dormer windows, lead flashings.

SW6 · Bishops Road

Mansard · 46 m2 · 13 weeks · £104,800

06 The team. All four.

FOUNDER, MD

Jamie Salter

12 years on the roof. Started the business in 2013 after eight years at a Wandsworth builder. Quotes most jobs personally.

FMB. Site Supervisor's Safety. CITB SMSTS.

ARCHITECT

Anya Chen

ARB-registered, six years at Allies and Morrison before joining Headroom. Draws every project we build. In-house.

ARB. RIBA Chartered. Part 3 qualified.

PROJECT MANAGER

Tom Beasley

Twenty years of loft conversions, eight at Headroom. Runs three concurrent projects, on site every day, weekly client updates.

CSCS. NVQ 7 Construction.

LEAD CARPENTER

Rauls Vītols

Trained in Riga, twelve years in London. The roof goes off and on under his eye. Every job, no exceptions.

City and Guilds Level 3. NVQ Carpentry.

ONE PROMISE

If the price changes after the contract is signed, the additional cost is on us. Not the client.

There is no clause that lets us pass on a surprise. We have been quoting lofts for twelve years. We know what is in the roof.

07 Get a quote.

Five working days from your first email to a fixed price. We visit you free of charge.

CALL 020 8127 4488 Mon to Fri, 8am to 5.30pm.