Georgian village. Planning authority: Sevenoaks District Council.
We prepare architectural drawings across Westerham and the surrounding area — Westerham, Hosey Hill, Crockham Hill border and the Chartwell fringe and the streets between them. The stock here is largely Georgian and Victorian houses and tile-hung Kentish cottages around a historic green, with detached homes on the surrounding hills, and we draw for every one of those types for submission to Sevenoaks District Council.
Westerham is a conservation-area market town set entirely within the Kent Downs National Landscape (AONB) and Green Belt — with Chartwell and Quebec House nearby — so schemes are heritage- and landscape-led, using traditional Kentish materials to satisfy Sevenoaks District Council. Whichever route your address falls under, we confirm it free at the measured survey and design to match the local Kent streetscape — from period rear and side-return extensions to rear-dormer and mansard loft conversions.
Full planning submission — existing and proposed plans, elevations, site plan and Design & Access Statement.
Construction-detail drawings for your builder and Building Control sign-off.
Rear-dormer, hip-to-gable, L-shape and mansard loft-conversion drawings.
Single-storey, double-storey, wrap-around and side-return extension drawings.
Full mansard conversion drawings with structural and thermal detailing.
Every householder application in Westerham is decided by Sevenoaks District Council, with a statutory 8-week determination. Allow around 12–14 weeks from first call to decision once the measured survey, design and validation are included. We research the council's Local Plan and recent decisions before drawing, and we hold a 98% first-time approval rate across our work.
Direct answers to what homeowners in Westerham ask about drawings, permission and fees.
Yes. Westerham (TN16, Kent) is well within our 50-mile service radius from our central London office — about 21 miles out, 50 min via Oxted or Sevenoaks. Every project includes an in-person measured survey at your property, so you are never charged mileage. We submit to Sevenoaks District Council through the Planning Portal.
Around Westerham, Hosey Hill, Crockham Hill border and the Chartwell fringe, the stock is largely Georgian and Victorian houses and tile-hung Kentish cottages around a historic green, with detached homes on the surrounding hills. We prepare planning and building-regulations drawings for every period represented, designed to match the local streetscape and satisfy Sevenoaks District Council.
It depends on your exact address. Many single-storey rear and side-return extensions on unlisted houses fall under Permitted Development, but Westerham is a conservation-area market town set entirely within the Kent Downs National Landscape (AONB) and Green Belt — with Chartwell and Quebec House nearby — so schemes are heritage- and landscape-led, using traditional Kentish materials to satisfy Sevenoaks District Council. Listed buildings, flats and conservation-area properties always need full planning, decided by Sevenoaks District Council. We confirm exactly which route applies to your home, free, at the survey.
Sevenoaks District Council determines householder applications in 8 weeks; allow around 12–14 weeks end to end once the survey, design and validation are included. We hold a 98% first-time approval rate.
Extensions on a boundary plot can involve two authorities. Everything we draw and submit is listed for Sevenoaks, Redhill and All commuter towns.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Before you commit, 30% below London architects and seeing why work with us. You can find your service to find the right fit, or create a free account to track your project. When you are ready, get a quote in minutes — most homeowners have a fee in minutes — or contact us for a chat and a chartered technologist will be in touch.
