Foxter
Agent
Dulwich Flat Roof & Lantern — On Site completed house extensions

South London · SE22 · 2026

Dulwich Flat Roof & Lantern — On Site

Category

House Extensions

Area

Dulwich (SE22)

Duration

11 weeks

Completed

2026

Overview

Warm flat roof built up with single ply membrane and the roof lantern upstand framed and weathered in. Sample house extension case study in Dulwich (SE22) — during construction stage, built by the Foxter site team.

Works were sequenced to keep the property secure and weathertight throughout, with a single site manager coordinating every trade from strip-out to final snagging.

Portfolio example — concept case study

Services provided

  • Planning & permitted development
  • Structural design & calculations
  • Building control sign-off
  • Groundworks & foundations
  • Drainage & manhole works
  • Brickwork & blockwork
  • Steel beam installation
  • Roofing, lanterns & rooflights
  • Glazing & external doors
  • Electrics & plumbing first fix
  • Plastering, flooring & decoration
  • Snagging & handover

Materials used

Single ply membranePIR warm roofAluminium lanternLead flashings

Before & after

After completion
Before works
BeforeAfter

Timeline

01

Survey & design

Measured survey, drawings and approvals.

02

Strip-out & structure

Demolition, groundworks and steelwork.

03

First & second fix

Services, joinery, plaster and tiling.

04

Finish & handover

Decoration, commissioning and snagging.

Total programme: 11 weeks

Gallery

Dulwich Flat Roof & Lantern — On Site — Single ply membrane and lantern upstand being finished
Single ply membrane and lantern upstand being finished
Dulwich Flat Roof & Lantern — On Site — Lantern light over the finished kitchen
Lantern light over the finished kitchen

Client feedback (illustrative)

Budget held, drawings were followed, handover was painless.

Illustrative feedback — SE22 house extension (portfolio example, not a real client review)

Project area

Approximate area only — Dulwich, SE22. No property addresses are published.