Conservation area orangery dining room
Camden · Victorian terrace · 10-week build
Brief
A mid-Victorian terraced house in Kentish Town, Camden conservation area. The clients wanted an orangery to create a dining and entertaining space connecting the existing kitchen to the garden, with enough architectural character to respect the Victorian host building.
Challenge
The property falls within the Kentish Town Conservation Area. Camden's design officer required London stock brick to match the existing Victorian stock, timber windows only (uPVC and aluminium refused on character grounds), and lantern proportions referencing the existing Victorian fenestration. A structural opening through the 9-inch rear party wall was required, involving party wall awards with both immediate neighbours.
Solution
Planning approval was achieved at first submission — a result of early pre-application consultation with Camden's conservation officer to agree materials and design intent before drawing up the formal submission. London stock brick pillars with reclaimed stock mortar colour match; Rationel FORMA timber windows and roof lantern framing; a VS LED-illuminated section within the lantern for evening atmosphere. Party wall awards were obtained for both neighbours. The structural RSJ over the opening into the existing kitchen was calculated by Builderr's in-house structural engineer.
Outcome
The 22m² orangery dining room is thermally separated from the main house by an external-quality timber door, preserving the EPC D rating on the existing dwelling — the orangery is excluded from the SAP calculation. The clients described the planning process as the most stressful element of the project, and Builderr's first-submission approval removed that stress entirely.
Spec
Project specification.
Gallery
Inside the build.
"The planning process was daunting in a conservation area but Builderr knew exactly what Camden wanted. First submission approval."
— James & Helen T., Kentish Town
Builderr vs other London builders.
The construction industry has a wide distribution of operators. Here's what changes between a directly-employed, fixed-scope outfit and the alternatives.
| Criterion | Builderr | Typical London builder | Cowboy outfit |
|---|---|---|---|
| Labour model | Directly employed team (PAYE) | Mixed subcontract gangs | Day-rate cash labour |
| Pricing | Fixed-scope itemised quote | Estimate + provisional sums | Verbal price + variations |
| Design & engineering | In-house architect + SE | Outsourced, separate billing | Builder draws on the back of an envelope |
| Planning + LDC handled | Yes — included in price | Often charged extra | Builder asks you to apply |
| Party wall surveyors | Instructed by us | Your responsibility | Skipped (illegal) |
| Building control | Plans + site inspections booked by us | Building Notice route | Not registered |
| Project management | Dedicated PM, weekly photo updates | Foreman doubles up | Owner-manager juggles 5 jobs |
| Payment schedule | Stage payments against signed-off milestones | Weekly invoices | Cash up front |
| Insurance | £10M PL + 10yr structural warranty | £2–5M PL only | No documented cover |
| Snags at handover | <3 typical | 20–30 typical | Walk-off mid-job common |
| Variation creep | 0% — fixed scope | +15–25% over original quote | +40%+ regularly |
Save £15,600–£35,100 on a conservatory & orangery.
Industry data (FMB, RICS, Which? Trusted Trader 2024) shows the average London construction project overruns by 18–22% on cost and 25–35% on time. Fixed-scope contracts with a single accountable team eliminate that variance. The savings above assume a typical project at £78,000.
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Get a fixed-scope quote with the same direct-labour delivery. Senior consultant call within one business hour.
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