Loft Conversions
in
Greenwich
Loft conversion specialists based in neighbouring Charlton — serving Greenwich's Victorian terraces in East Greenwich, the Edwardian suburbs of Westcombe Park, and period properties across the World Heritage Site area. Local knowledge, heritage experience, honest pricing.
Based in Charlton · Serving Greenwich
Planning to Handover
Free Site Consultations
On Your Doorstep.
Genuinely Local.
Kelmend Construction is based in Charlton SE7 — immediately next to Greenwich. We've worked on loft conversions across East Greenwich, Westcombe Park, Maze Hill, and Charlton for years and the Royal Borough of Greenwich is our home patch.
Greenwich's housing stock for loft conversions is genuinely varied — Victorian terraces in East Greenwich suit dormer and mansard conversions; the Edwardian semis and villas of Westcombe Park and Maze Hill are ideal for substantial hip-to-gable combinations; and properties near the World Heritage Site carry additional planning complexity that requires specific knowledge to navigate. Our loft conversions service is built around exactly this kind of local, property-specific expertise.
We Know
Your Roof
Victorian Terraces
The Victorian terraces of East Greenwich suit rear dormer and mansard conversions well. Many have the roof pitch and ridge height for a substantial conversion. Outside the WHS buffer zone, rear dormers usually fall under permitted development. Mansards deliver the most usable space but always require planning.
Westcombe Park Edwardians
Westcombe Park's intact Edwardian semis sit on generous plots with roof structures well-suited to substantial loft conversions. Hip-to-gable conversions are particularly effective on the semi-detached stock. The conservation area designation means design quality is reviewed carefully by Greenwich Council.
Edwardian Semis & Villas
Maze Hill's Edwardian semis and larger villas offer excellent loft conversion potential — generous ridge heights, good floor area, and cut roof structures. Some properties near the World Heritage Site setting require more careful planning engagement, but the results can be exceptional.
Georgian Town Houses
The Georgian properties around Crooms Hill are among the most architecturally significant in South East London. Many are listed. Loft conversions require listed building consent, and design must be entirely sympathetic with the original building. Possible — but demanding and requiring specialist experience.
Victorian Villas & Large Semis
The larger Victorian and Edwardian properties bordering Blackheath offer significant loft conversion potential — roof volumes that can accommodate two bedrooms and a bathroom, with strong property values making the return on investment particularly compelling.
Post-War & Modern Housing
Post-war housing in outer Greenwich typically has fewer planning constraints but trussed roof structures that require structural alteration before conversion. Outside conservation areas, these tend to have the most straightforward planning position in the borough.
Types of
Loft Conversion
Rear Dormer
The most versatile conversion type — a box-shaped dormer projecting from the rear roof slope. Falls under permitted development in most East Greenwich locations outside conservation areas. Can comfortably accommodate a bedroom and en-suite.
Mansard
Changes the entire rear roof slope to near-vertical — maximum headroom, maximum floor area. Particularly effective on Greenwich's Victorian terraces. Always requires planning permission. Design is reviewed carefully in conservation areas and the WHS setting.
Hip-to-Gable
Extends the sloping hip end to a vertical gable — highly effective on Westcombe Park and Maze Hill's Edwardian semi-detached stock. Usually falls under permitted development outside conservation areas.
Hip-to-Gable & Rear Dormer
The combination that delivers the most usable space on Edwardian semis. Can deliver two bedrooms and a bathroom in a single project. Usually permitted development outside conservation areas.
Velux / Rooflight
No roof shape change — Velux windows cut into the existing slope. On Greenwich's Victorian and Edwardian properties with steeper pitches, Velux conversions can deliver surprisingly spacious rooms. Almost always permitted development outside listed buildings.
L-Shaped Dormer
Combines a rear dormer with a side dormer over an existing rear addition. Particularly effective on Westcombe Park's larger properties. Requires planning permission in most cases.
What You Need
to Know
Greenwich has unique planning considerations — the UNESCO World Heritage Site designation, multiple conservation areas, and a high concentration of listed buildings all affect loft conversion options in ways that require specific knowledge.
The World Heritage Site
Properties within or near the Maritime Greenwich WHS setting may face additional scrutiny for roofline alterations — particularly where they could affect views from or toward the WHS. We check the WHS boundary for every Greenwich property at the consultation stage.
Listed Buildings
Listed buildings require listed building consent for any loft conversion, regardless of size. Greenwich has a high concentration of listed residential properties. Design must be entirely sympathetic to the original building's character and Historic England may be consulted.
Conservation Areas
Westcombe Park, Charlton Village, Maze Hill, Greenwich Town Centre, and Crooms Hill all carry conservation area status. Dormers visible from the street or affecting area character require planning permission with close design review.
Permitted Development
Outside conservation areas, listed buildings, and the WHS curtilage, most Greenwich properties qualify for PD for dormer and hip-to-gable conversions within volume limits. We verify this for your specific address before any design work begins.
Building Regulations
All loft conversions require building regulations approval — structural integrity, fire safety, insulation, means of escape. We manage this throughout and obtain the completion certificate from Royal Borough of Greenwich building control.
Party Wall
Most conversions on Greenwich's terraced and semi-detached stock involve party wall considerations. We flag this early so notices are served and agreements reached well before the build start date.
Greenwich's
Heritage Context
Greenwich has more heritage designations per square mile than almost anywhere in London. We've worked across all of the following:
Why Greenwich
Homeowners Choose Us
Based Next Door
We're in Charlton SE7 — five minutes from East Greenwich. We know the streets, the property types, and what Greenwich Council expects from loft conversion applications across every part of the borough.
World Heritage Site Experience
Working within or adjacent to the Maritime Greenwich WHS requires planning knowledge that most builders don't have. We've navigated these requirements successfully and understand what triggers additional scrutiny.
Listed Building Experience
Loft conversions on listed buildings require planning permission and listed building consent. We've delivered them and understand the design standards required to get them approved by Greenwich's heritage team.
Family-Run, Directly Accountable
You deal with us throughout — on a borough where build quality is visible and the properties deserve a high standard, that direct accountability matters.
Itemised, Honest Quotes
Full line-item quotes — no hidden costs. Any changes mid-project costed in writing before we proceed.
Full Project Management
Structural engineer, building control, planning and listed building consent where needed — managed from our Charlton base, five minutes from your door.
Our Loft Conversion
Process in Greenwich
Free Consultation & Roof Assessment
We come to your Greenwich property from our Charlton base. We assess the roof structure, head height, and planning position — including WHS setting, conservation area, and listed building status — and give you an honest read on what's feasible and what it will cost.
Design & Planning
We work with your architect or recommend one experienced with Royal Borough of Greenwich and the WHS. We advise on the planning route — including whether listed building consent is required — and manage the whole process.
Detailed Quote & Contract
Once drawings are finalised, a fully itemised quote covering every element of the project. Clear on scope, programme, payments, and how variations are handled — all in writing before any work begins.
The Build
Work starts on the agreed date from our Charlton base. Structural work, roof alteration, insulation, windows, first fix, plastering, second fix, decoration — managed as a single programme with regular updates throughout.
Staircase & Fit-Out
The staircase designed and built to fit the property. Fit-out includes flooring, bathroom if included, and all finishing trades coordinated as a single programme without gaps.
Building Control Sign-Off
Royal Borough of Greenwich building control sign-off obtained. Full snagging walkthrough. We're five minutes away if anything comes up afterwards.
Covering the
Whole Borough
We carry out loft conversions across Greenwich and the Royal Borough. Our core areas include:
Greenwich Loft Conversion
FAQs
How much does a loft conversion cost in Greenwich?
A Velux conversion in Greenwich typically costs £20,000–£35,000. A rear dormer runs £35,000–£60,000. A hip-to-gable with rear dormer on a Westcombe Park Edwardian semi typically costs £50,000–£75,000. A mansard on an East Greenwich Victorian terrace runs £55,000–£85,000+. Properties within or near the WHS or conservation areas may require higher-specification materials. We'll give you an accurate figure after visiting your property.
Does the World Heritage Site affect my loft conversion?
It depends on where your property sits. Properties within the WHS curtilage face the strictest controls. Properties within the WHS setting may face additional scrutiny for roofline alterations affecting views toward the WHS. Many residential properties in Greenwich are outside both and qualify for permitted development as normal. We check the WHS position for every Greenwich property at the consultation stage.
Can I convert the loft of a listed building in Greenwich?
Yes — but it requires both planning permission and listed building consent, and the design must be entirely sympathetic to the original building. Any structural alteration to a listed building is scrutinised carefully by Greenwich Council's heritage team and may involve Historic England. We've delivered loft conversions on listed buildings and understand the process.
Do I need planning permission for a loft conversion in Greenwich?
Most conversions on Greenwich's Victorian and Edwardian properties fall under permitted development outside conservation areas, the WHS curtilage, and listed buildings. Mansard conversions always require planning. Properties in Westcombe Park, Charlton Village, Maze Hill, or other conservation areas may require planning depending on the conversion type and its visibility.
How long does a loft conversion take in Greenwich?
A Velux conversion takes 4–6 weeks on site. A rear dormer takes 8–12 weeks. A hip-to-gable with rear dormer takes 10–14 weeks. A mansard takes 12–16 weeks. Planning (where required) adds 8–13 weeks before work begins — applications involving heritage designations may take longer. We'll give you a realistic programme in your quote.
Will a loft conversion add value to my Greenwich home?
In most cases, significantly. Greenwich property values — particularly in Westcombe Park, Maze Hill, and around the park and town centre — are among the highest in South East London. A well-built loft conversion can add 10–20% to a property's value. Build quality and design sensitivity matter enormously in Greenwich — a conversion that looks out of place on a period property can detract from value.
Converting Your Loft
in Greenwich?
We're based in neighbouring Charlton — a five-minute drive from your door. Tell us about your project and we'll come to you for a free, no-obligation consultation.
No pushy sales. No call centres. Just a straight conversation about your Greenwich project.