# Extending a Period Home in Chelsea, Kensington, Notting Hill and Belgravia

> Renovating a listed or conservation-area property in Chelsea, Kensington, Notting Hill or Belgravia — what changes, and what it typically costs.

Author: Ben Murrell, Homeowners Project Manager · Published: 2026-05-06 · Category: Local Guides · Areas: Chelsea, Kensington, Notting Hill, Belgravia
Canonical: https://www.homeownersprojectmanager.co.uk/blog/extending-period-home-chelsea-kensington-notting-hill-belgravia

[Chelsea](https://www.homeownersprojectmanager.co.uk/areas/chelsea), [Kensington](https://www.homeownersprojectmanager.co.uk/areas/kensington), [Notting Hill](https://www.homeownersprojectmanager.co.uk/areas/notting-hill) and [Belgravia](https://www.homeownersprojectmanager.co.uk/areas/belgravia) have some of the highest concentrations of listed buildings and conservation area coverage in London, which changes the shape of almost every renovation project here compared with elsewhere.

## Listed building consent, in addition to planning

A meaningful share of the stock in Belgravia and parts of Chelsea and Kensington is listed, which means alterations — inside as well as out — need listed building consent alongside any planning permission. This covers things that wouldn't normally need permission elsewhere, like removing an internal wall or changing a fireplace. Budgeting extra time for this stage, and appointing a heritage-aware architect, both matter more here than almost anywhere else in London.

## Conservation area consent even where not listed

Even unlisted properties on these streets typically sit within a conservation area, so front elevations, window replacement and roofline changes are all controlled. Basement excavation — common in this part of London given the value of additional space — has its own, often more demanding planning regime in Kensington & Chelsea specifically, with structural and party wall requirements that need specialist input from the start.

## Specification expectations are higher

The finish level expected in this part of London is typically a step up — bespoke joinery, natural stone, higher-end kitchen and bathroom fit-out. That doesn't mean trade pricing matters less; if anything, the savings available on higher-value fittings are larger in absolute terms, since the markup on a premium kitchen or bathroom suite scales with its price.

## What tends to surprise people

The main surprise isn't cost — most homeowners here have priced that in — it's timeline. Between listed building consent, conservation area sign-off and, where relevant, basement planning, the pre-construction phase alone can run considerably longer than a comparable project without those constraints. Building that into the plan from day one avoids the frustration of an open-ended wait.

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Homeowners Project Manager — independent client-side project management for homeowners in South West London. Contact: 07525 474 849 · https://www.homeownersprojectmanager.co.uk/contact