Basement in Camden: Planning Permission Guide
What you need to know about basement extensions in Camden — planning requirements, costs, and professional guidance.
Based on 129 decided applications in Camden over 12 months (126 granted, 3 refused).
Camden has over 40 conservation areas including Hampstead, Belsize Park, Bloomsbury, Fitzrovia, and Regent's Park. Listed building density is high, particularly in Bloomsbury and around Regent's Park. Article 4 Directions are widespread, restricting window replacements, front door changes, and satellite dishes in many conservation areas. The council's design guidance is notably detailed and strictly enforced.
Recent basement decisions in Camden
The 5 most recent decided applications. Addresses redacted to postcode area.
Non- Material Amendment to planning reference 2023/5240/P dated 26/01/26 for redevelopment of Euston Tower comprising retention of parts …
Installation of external incoming gas main connection and internal distribution pipes; replacement of basement and second-floor boilers; …
Details of Privacy measures for Units 11 and 12's 2nd floor rear windows on the Southeast Elevation, required by condition 18 of planning…
Details pursuant to Condition 3 (Material Details) of planning permission ref. 2023/1275/P (dated 07/06/2023) for: Creation of front ligh…
Details of building design to partially re-discharge parts A, B, C, D and E of Condition 11 of planning permission 2022/1515/P dated 20/0…
These are borough-wide. See the 5 nearest to your address.
Check your address freePermitted Development Rules
Basement excavation requires a full planning application.
Basement excavation does not have permitted development rights under Part 1 of the GPDO. A full planning application is always required.
Typical Costs in London
Basements are among the most expensive home improvement projects. Costs vary enormously depending on depth, ground conditions, and access.
Cost per m²
construction rate
Typical total
Based on 25–50 m²
Typically includes
Typically excludes
Basement projects are complex and costs vary enormously depending on depth, ground conditions, waterproofing, and access. Professional advice is essential.
Get a personalised cost estimate based on your actual basement dimensions.
Get my estimateWhich Professionals Do You Need?
Basement projects are complex and always require specialist professional input — an architect, structural engineer, and usually a party wall surveyor.
You'll need an architect, a structural engineer, and a party wall surveyor for this project.
Basement projects are complex and require specialist architectural and structural design.
Typical fee: £5,000–£15,000 (Full architectural service)
Basement excavation requires detailed structural engineering for underpinning, retaining walls, and waterproofing.
Typical fee: £2,000–£5,000
Basement excavation almost always triggers the Party Wall Act due to work near neighbouring foundations.
Typical fee: £700–£1,500 (per neighbour)
This guidance is based on a typical semi-detached house with no special constraints. Listed buildings, conservation areas, and attached properties may require additional professional input.
Find out exactly which professionals you need for your basement.
Get personalised guidanceConservation Areas & Listed Buildings
In conservation areas, basement applications receive additional scrutiny. The council will consider the impact on neighbouring properties and the character of the area.
Properties in conservation areas often have reduced permitted development rights. Some project types (like side extensions) lose PD rights entirely. An Article 4 Direction can remove additional PD rights.
Listed buildings (Grade I, II*, or II) have no permitted development rights at all. Any external alteration requires Listed Building Consent in addition to any planning permission. An architect experienced in heritage work is essential.
Check if your property is in a conservation area or has other planning constraints.
Check my propertyFrequently Asked Questions
Just want a quick yes/no for your basement?
Run our free 2-minute check to see whether your project likely qualifies as permitted development in Camden — your address, your constraints, your council's own recent decisions.
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