Loft Conversion Builders in Greenwich (SE10, SE3)
Professional loft conversion builders in Greenwich, South East London.
Why Choose All Well for Loft Conversions in Greenwich?
The Victorian semis in SE3, around Vanbrugh Park and Westcombe Park, have some of the best loft conversion potential in Greenwich. Good roof height and manageable party wall situations (one side only) make them ideal candidates. We've also done conversions in the Georgian properties closer to the park, though these need more careful design to satisfy the conservation requirements. Either way, you end up with a proper extra bedroom that didn't exist before.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Loft Conversions for Greenwich Properties
Greenwich is known for its georgian terraces, victorian semis, riverside apartments. Our loft conversions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SE10, SE3
Loft Conversions Tip for Greenwich Homeowners
Listed buildings in Greenwich need Listed Building Consent for any loft conversion, and the conservation team will want to see that the character of the building is preserved. For non-listed properties, the Greenwich Masterplan design guide has specific recommendations for dormer proportions and materials. Roof tiles in Greenwich vary from Welsh slate on Georgian properties to plain clay tiles on Victorians, so the dormer cladding needs to match the existing roof to avoid a planning objection.
Loft conversion types that work for SE10 and SE3 properties
Three patterns cover most of what we build in Greenwich. The right one depends on your roof structure, whether the property is listed, and where it sits relative to the Maritime Greenwich World Heritage Site buffer zone.
Hip-to-gable and rear dormer on Victorian semis near Vanbrugh Park
Hip-to-gable is the most common Greenwich project, and the Victorian and Edwardian semis around Vanbrugh Park and Westcombe Park in SE3 are well suited to it. The sloping side roof is replaced with a vertical gable wall built up in matching London stock brick; a rear dormer creates a full-width master bedroom with en-suite. The work covers structure, staircase, en-suite plumbing, electrics, plastering, and decoration. Build time 12-14 weeks. Semi-detached properties qualify for the 50 cubic metre Class B permitted development allowance, and the single party wall (attached side only) keeps the process straightforward. Rear dormer on a Victorian terrace around Greenwich South Street and the streets towards Charlton is a tighter footprint. Build time 10-12 weeks. Cut-roof construction with 2.4-2.6 metres at the ridge creates enough volume for a master bedroom with en-suite. The 40 cubic metre Class B terraced allowance applies, except where the Maritime Greenwich World Heritage Site buffer zone or a conservation area applies.
Listed Georgian terrace loft conversions on Crooms Hill and Maze Hill
Conversions on Grade II listed Georgian terraces along Crooms Hill, Maze Hill, and Park Vista are a different undertaking. Listed Building Consent is required for any roof alteration, visible or not. Mansard conversions are virtually never consented within the Maritime Greenwich World Heritage Site core or buffer zone because they alter the roof profile against the Site's Outstanding Universal Value. Hip-to-gable with rear dormer is usually the only consentable option. Heritage materials are non-negotiable: Welsh slate, lead flashing, lime mortar, traditional sash or casement dormer windows. These projects are built to a heritage specification throughout. Build time 18-26 weeks including consent.
Planning permission for loft conversions in Maritime Greenwich and SE3 conservation areas
Three overlapping layers of planning control affect most SE10 and SE3 loft conversions. Understanding which apply to your property shapes the design and programme before any drawings are commissioned. Several conservation areas, including Greenwich Park, West Greenwich, East Greenwich, and Blackheath, cover the residential streets around the Park in SE3. The Royal Borough of Greenwich publishes design guidance on dormer proportions, materials, and setbacks. Roof tiles vary from Welsh slate on Georgian and early Victorian properties to plain clay tiles on later Victorians; the new dormer cladding must match the existing covering or a planning objection follows. Front-facing dormers are virtually never approved. Rear dormers need subordinate proportions. On Grade II listed properties across Crooms Hill, Maze Hill, and Park Vista, Listed Building Consent runs alongside any planning application and takes 8-12 weeks at the Royal Borough of Greenwich.
Why mansard loft conversions are refused in the Maritime Greenwich World Heritage Site
The Maritime Greenwich World Heritage Site (inscribed by UNESCO in 1997) covers the area around the Royal Naval College, Greenwich Park, and the Queen's House. The buffer zone extends to surrounding residential streets in SE10. Within both the core Site and the buffer zone, mansard conversions change the roof profile against the Site's Outstanding Universal Value and are virtually never consented. The Royal Borough of Greenwich conservation team applies particular scrutiny to applications here; front-facing dormers, roof alterations, and material changes all need detailed justification. Hip-to-gable with rear dormer is usually the only consentable option on listed and conservation properties within the buffer zone. We check the buffer zone boundary on the Royal Borough of Greenwich planning portal at survey before quoting.
Royal Borough of Greenwich process from survey to Building Control sign-off
Greenwich loft conversions run under the Royal Borough of Greenwich. The permitted development route, the consent process, and the build sequence all have Greenwich-specific details that affect the programme.
Permitted development and Lawful Development Certificate for Greenwich loft conversions
Permitted development under Class B covers loft conversions on non-listed, non-conservation properties within volume limits: 40 cubic metres for terraced houses and 50 cubic metres for semi-detached or detached. We submit a Lawful Development Certificate (£129, 6-8 weeks at Royal Borough of Greenwich) on permitted development projects. For listed or conservation area projects, full planning plus Listed Building Consent applies, with the council typically determining applications in 8-12 weeks. Fixed-price contracts cover labour, materials, structural engineer calculations, Building Control fees, FENSA glazing registration, party wall surveyor coordination, Listed Building Consent application costs, conservation-specialist architect coordination, and FD30 escape route door upgrades. The price is confirmed after a free site visit.
Greenwich loft conversion build sequence and fire safety requirements
A Greenwich loft conversion involves 9-15 trades over 10-26 weeks (longer for listed projects): structural steel, joist and floor structure, dormer or gable carcassing, brick build-up matched to existing London stock, Welsh slate or matching tile roofing with lead flashing, windows and rooflights, insulation (150mm PIR between rafters plus 50mm under, U-value 0.18 W/m²K under Building Regulations Part L, with conservation derogations on listed roof fabric), staircase joinery, plastering, NICEIC electrics (BS 7671), en-suite plumbing, and decoration. Fire safety follows Building Regulations Part B: protected escape route with FD30 fire doors on every habitable room along the route to the front door, mains-wired interlinked smoke alarms on every floor, 30-minute fire-resistant floor construction. On listed SE10 properties, original panelled doors are upgraded to FD30 with intumescent strip and concealed closer rather than replaced. We assign one project manager from survey through handover.
Loft Conversions in Greenwich: What's Included
How I price loft conversions in Greenwich
I price every loft conversions job in Greenwichafter I’ve seen it. No two properties are the same, so a number here would only mislead you. What you get instead is a fixed-price contract, a week-by-week programme, and no costs that turn up later.
Get a fixed quoteWhat Our Customers Say
“All Well managed our project from start to finish. The fixed-price contract meant no surprises, and the result is stunning.”
Verified Customer
Greenwich
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Greenwich
Frequently Asked Questions
- Can I do a mansard in Maritime Greenwich?
- Almost never. The Maritime Greenwich World Heritage Site (inscribed by UNESCO in 1997) covers the area around the Royal Naval College, Greenwich Park, and the Queen's House. The buffer zone extends to surrounding streets. Within both the core Site and the buffer zone, mansard conversions change the roof profile against the Site's Outstanding Universal Value and are virtually never consented. The Royal Borough of Greenwich's conservation team applies particular scrutiny to applications in the buffer zone. Hip-to-gable with rear dormer is usually the only consentable option on listed and conservation properties within the buffer zone; the existing roof profile is preserved on the visible side and the addition is set back from the street. We check the buffer zone boundary on the Royal Borough of Greenwich planning portal at the survey.
- Do I need Listed Building Consent for a Greenwich Georgian loft conversion?
- Yes, on virtually any Grade II listed property, for any roof alteration whether or not it's visible from the street. Many of the Crooms Hill, Maze Hill, Park Vista, and Croom's Hill Grove properties are Grade II listed. Application takes 8-12 weeks at the Royal Borough of Greenwich and runs in parallel with planning. Conservation officers expect heritage materials matched to the original: Welsh slate roofing, lead flashing throughout, lime mortar pointing on stock brick where exposed, traditional sash or casement dormer windows. We work with conservation-specialist architects on every listed Greenwich project, and the Maritime Greenwich World Heritage Site buffer zone adds a further layer of scrutiny that we factor into the design from day one.
- Why hire All Well for a Greenwich loft conversion?
- Three reasons. First, conservation experience: we know the SE10 and SE3 stock, from Victorian and Edwardian semis around Vanbrugh Park and Westcombe Park to Grade II listed Georgian terraces along Crooms Hill and Maze Hill, the Maritime Greenwich World Heritage Site buffer zone, and the Royal Borough of Greenwich planning process. Second, full accreditation: NICEIC for electrical (BS 7671), FENSA for glazing, Gas Safe registered for boiler relocation, structural engineer calculations, and Building Control sign-off included on every project. Third, fixed-price contracts: the quote doesn't change unless the specification does, including Listed Building Consent applications, conservation-specialist architect coordination, and heritage materials. Office on Limes Avenue, SE20.
All Well has completed 100+ projects across 25 London boroughs since 2020. We are NICEIC approved for electrical work, FENSA registered for glazing, and CHAS certified for site safety, with Public Liability insurance to £5 million. 57+ Google reviews average 4.5 stars. All Well Property Services® is a UK registered trademark, Companies House no. 12721034, operating from Unit 1 Limes Avenue, Anerley SE20 8QR.
Loft Conversions Near Greenwich
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