Basement in East Hampshire: Planning Permission Guide
What you need to know about basement extensions in East Hampshire — planning requirements, costs, and professional guidance.
Check if your basement qualifiesBasements in East Hampshire at a glance
application fee
weeks typical
A large part of East Hampshire lies within the South Downs National Park — properties there are on Article 1(5) land where permitted-development rights are significantly restricted, so confirm your address's status before relying on PD. The district also has 50 conservation areas and 50 Article 4 directions affecting specific areas, plus around 2,900 listed buildings.
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Approval probability, 5 nearest comparables, refusal reasons — for your specific address.
Recent basement decisions in East Hampshire
The 5 most recent decided applications. Addresses redacted to postcode area.
Application to determine if PRIOR Approval is required for Excavation of three new agricultural wildlife/irrigation ponds.
Discharge Condition 7 (Landscape) of approved application 21548/010 Proposed change of use of ground floor [part] to Class E business use…
Discharge Condition 4 (Windows and Doors) of approved application EHDC-24-0127-LBC- Listed building consent single storey extensions …
Discharge of Condition 4 - Energy of approved permission 21548/010 - Proposed change of use of ground floor [part] to Class E business us…
Application for a lawful development certificate for proposed excavation works
These are borough-wide. See the 5 nearest to your address.
Get my report — £9Permitted 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 South East England
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 East Hampshire. For personalised approval odds and nearby comparables, get the full report above.
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