Rear, side-return and wrap-around extensions delivering more space, more light and more value — planned and built end-to-end.
We manage survey, design, planning or lawful development checks, structural calculations, shell build and interiors. Expect a seamless transition between old and new with daylight, ventilation and flow designed in.
Shell, rooflight(s), glazing & interior fit-out.
Steelwork, infill roof & kitchen re-plan.
Complex structure & services re-routes.
Lead times & custom specifications apply.
Indicative only — confirmed after survey & design pack.
Measured survey, layout options, daylight & flow.
Drawings, structural calcs & PD/planning as needed.
Steelwork, shell, roofing, glazing & interiors.
Certification, warranties & aftercare.
A full-width single-storey rear extension transformed this 1930s terraced property in Ealing into a bright, open-plan kitchen and dining space. We focused on structure, natural light and energy efficiency, achieving a seamless connection between home and garden.
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Recent extensions and major refurbishments delivered across London.
Services upgrade, new layout, energy efficiency improvements.
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Mansard roof with ensuite; maximised daylight and smart storage.
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Victorian terrace re-plan with new services, bespoke joinery and premium finishes.
View details“The new kitchen-diner is stunning and the build was smooth.”
Sara — Fulham
“Fixed price and weekly updates made it stress-free.”
Josh — Islington
“Quality finish, great communication. Highly recommend.”
Priya — Ealing
CHAS Accredited
FMB Member
SafeContractor
TrustMark
Forge Build proudly serves homeowners and developers across London and the South East, delivering extensions, conversions, and full refurbishments to the highest standards.
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Call us to check: 020 3355 6146
Many single-storey rear extensions fall under permitted development. We’ll advise and handle PD/planning as required.
Yes, structural calcs, inspections and sign-off are included in our end-to-end delivery.
Often yes. We’ll phase the works and aim to keep essential services running where feasible.
Book a free site visit — get expert advice, a clear programme and a fixed-price quote.