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, manageable party wall situations (one side only), and property values that make the numbers work well. 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 — the dormer cladding needs to match the existing roof to avoid a planning objection.
What a Greenwich loft conversion typically covers
Three patterns cover most of what we build in SE10 and SE3. Hip-to-gable on a Victorian or Edwardian semi around Vanbrugh Park and Westcombe Park is the most common Greenwich project. The semis have hipped roofs that suit hip-to-gable conversions — the sloping side roof is replaced with a vertical gable wall built up in matching London stock brick, and a rear dormer creates a full-width master bedroom with en-suite. Cost is £55,000-£85,000 including 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. The single party wall (attached side only) simplifies the process — no party wall agreement needed on the detached side where the hip becomes a gable. Rear dormer on a Victorian terrace around Greenwich South Street and the streets towards Charlton is the second pattern. Cut-roof Victorian construction with 2.4-2.6 metres at the ridge. A rear dormer creates a master bedroom with en-suite within the existing roofline. Cost is £48,000-£72,000. Build time 10-12 weeks. The 40 cubic metre Class B terraced allowance applies, except where Maritime Greenwich World Heritage Site buffer zone or conservation area constraints apply. Mansard or hip-to-gable on a Grade II listed Georgian terrace along Crooms Hill, Maze Hill, or Park Vista is the third pattern. Listed Building Consent is required. Mansards are prohibited within the Maritime Greenwich World Heritage Site core because they change the roof profile against the Outstanding Universal Value of the Site; hip-to-gable with rear dormer is usually the only consentable option. Cost is £85,000-£140,000 reflecting heritage materials (Welsh slate, lead flashing, lime mortar) and the Listed Building Consent process. Build time 18-26 weeks including consent.
Maritime Greenwich World Heritage Site, listed buildings, and conservation
Three Greenwich factors define the planning approach on most loft conversions in SE10 and SE3. 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 streets. Within the core Site and the buffer zone, mansard conversions are virtually never consented because they change the roof profile against the Site's Outstanding Universal Value. Hip-to-gable with rear dormer is usually the only consentable option on listed and conservation properties within the buffer zone. Royal Borough of Greenwich's conservation team applies particular scrutiny to applications in the buffer zone — front-facing dormers, roof alterations, and material changes need detailed justification. Grade II listed Georgian terraces. Many of the Crooms Hill, Maze Hill, Park Vista, and Croom's Hill Grove properties are Grade II listed. Listed Building Consent is required for any roof alteration whether or not it's visible from the street. Application takes 8-12 weeks at the Royal Borough of Greenwich. 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 rather than modern picture windows. We work with conservation-specialist architects on every listed Greenwich project. Greenwich Masterplan and conservation areas. The Royal Borough of Greenwich publishes design guidance covering dormer proportions, materials, and setbacks. Roof tiles in Greenwich 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. Several conservation areas (Greenwich Park, West Greenwich, East Greenwich, Blackheath) cover the residential streets around the Park. Front-facing dormers are virtually never approved; rear dormers need subordinate proportions. We check the boundary on the Royal Borough of Greenwich planning portal at the survey before quoting.
Royal Borough of Greenwich process and project management
Greenwich falls under the Royal Borough of Greenwich. Permitted development under Class B covers loft conversions on non-listed, non-conservation properties within volume limits — 40 cubic metres for terraced and 50 cubic metres for semi-detached or detached. We submit a Lawful Development Certificate (£103, 6-8 weeks at Royal Borough of Greenwich) on permitted development projects. For listed or conservation area projects, full planning at £206 plus Listed Building Consent applies and the council typically determines applications in 8-12 weeks. A Greenwich loft conversion involves 9-15 trades over 10-26 weeks (longer for listed projects): structural steel install, joist and floor structure, dormer or gable carcassing, brick build-up matched to existing London stock with lime mortar pointing on heritage projects, Welsh slate or matching tile roofing with lead flashing, traditional sash or casement dormer windows on listed properties (Velux rooflights and FENSA casement on standard projects), insulation (150mm PIR between rafters plus 50mm under to U-value 0.18 W/m²K under Building Regulations Part L, with conservation derogations on listed roof fabric where compliance harms heritage), staircase joinery (with care for original timber staircase preservation on listed properties), plastering (lime-based on listed properties to BS EN 459), NICEIC electrics (BS 7671), en-suite plumbing, decoration. Listed projects add a heritage consultant and conservation-specialist architect. We assign one project manager from survey through handover with photo updates. 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 properties, original panelled doors are upgraded to FD30 with intumescent strip and concealed door closer rather than replaced. Stair design follows Building Regulations Part K — 2 metres minimum headroom, 42 degree maximum pitch. Fixed-price contracts cover labour, materials, structural engineer calculations (£700-£1,500 for the design pack; £1,500-£3,000 for listed structural redesign), Building Control fees (£450-£800 at Royal Borough of Greenwich), FENSA glazing registration, party wall surveyor coordination, Listed Building Consent application costs, conservation-specialist architect coordination, FD30 escape route door upgrades, and the Lawful Development Certificate or planning fee.
Loft Conversions in Greenwich: What's Included
Loft Conversions Pricing in Greenwich
£45,000 – £80,000
6–10 weeks | Fixed-price contracts | No hidden costs
What 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
- How much does a Greenwich loft conversion cost?
- Hip-to-gable on a Victorian or Edwardian semi around Vanbrugh Park or Westcombe Park (the most common Greenwich project) runs £55,000-£85,000 including structure, staircase, en-suite plumbing, electrics, plastering, and decoration. Rear dormer on Victorian terraces runs £48,000-£72,000. Listed Georgian terrace conversions along Crooms Hill or Maze Hill run £85,000-£140,000 reflecting heritage materials (Welsh slate, lead flashing, lime mortar), Listed Building Consent, and conservation-specialist architect coordination. FD30 escape route door upgrades are £400-£600 per door. Party wall surveyor (Agreed Surveyor route) is £900-£1,500. Listed structural redesign adds £1,500-£3,000 over a standard engineering pack. Fixed-price contract before any work starts.
- 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 — Victorian and Edwardian semis around Vanbrugh Park and Westcombe Park, 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. 57 verified Google reviews averaging 4.5/5. Office on Limes Avenue, SE20.
Loft Conversions Near Greenwich
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