Outbuilding / garden building in Tonbridge and Malling: Planning Permission Guide
Your guide to outbuildings and garden buildings in Tonbridge and Malling — sheds, home offices, summer houses, and more.
Check if your outbuilding / garden building qualifiesOutbuilding / garden buildings in Tonbridge and Malling at a glance
approved
application fee
weeks typical
Based on 22 decided applications in Tonbridge and Malling over 12 months (21 granted, 1 refused).
Tonbridge and Malling includes or borders the Kent Downs AONB — properties in or near those areas are on Article 1(5) land where permitted-development rights are restricted. Tonbridge and Malling has 60 conservation areas — extensive heritage coverage restricting external alterations across many streets. 1,323 listed buildings recorded.
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Approval probability, 5 nearest comparables, refusal reasons — for your specific address.
Recent outbuilding / garden building decisions in Tonbridge and Malling
The 5 most recent decided applications. Addresses redacted to postcode area.
Demolition of two existing outbuildings and construction of two storey cart lodge
Proposed detached two storey outbuilding to rear garden (Amendment to Previous Approval Ref: TM/18/02872/FL)
G1 (Applicants ref) 8x Yew trees- Fell to ground level. Hedgerow is causing excessive shading to the outbuilding. Ongoing management is i…
Partial demolition and reconstruction of single storey garden room to rear
Erection of a summerhouse (Retrospective)
These are borough-wide. See the 5 nearest to your address.
Get my report — £9Permitted Development Rules
Buildings etc incidental to the enjoyment of a dwellinghouse
GPDO 2015, Schedule 2, Part 1, Class E
Outbuildings are covered by Part 1, Class E of the GPDO. They must be incidental to the enjoyment of the house and placed to the rear of the property.
Key dimension limits
These are the maximum GPDO limits for a detached house with no constraints. Your actual limits depend on your property type, location, and any planning restrictions.
Enter your postcode to see the personalised limits for your outbuilding / garden building.
Check my limitsTypical Costs in South East England
Outbuilding costs range widely depending on whether you're building a basic timber shed or a fully insulated home office with electrics and plumbing.
Cost per m²
construction rate
Typical total
Based on 8–15 m²
Typically includes
Typically excludes
A basic timber garden room is at the low end. Insulated home offices with electrics and plumbing are at the higher end.
Get a personalised cost estimate based on your actual outbuilding / garden building dimensions.
Get my estimateWhich Professionals Do You Need?
Most outbuildings don't require professional design. Garden room suppliers often provide designs, and a competent builder can handle construction.
A draughtsperson or architectural technician can prepare any drawings needed. A full architect may not be necessary.
Garden buildings and garages can often use supplier designs or simple drawings from a draughtsperson.
Typical fee: £500–£2,000 (Basic drawings)
May apply if the work is within 3 metres of a shared boundary. Check with your builder.
Typical fee: £700–£1,500 (per neighbour (if applicable))
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 outbuilding / garden building.
Get personalised guidanceConservation Areas & Listed Buildings
The same Class E rules apply in conservation areas. Total outbuilding coverage must not exceed 50% of the curtilage 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 outbuilding / garden building?
Run our free 2-minute check to see whether your project likely qualifies as permitted development in Tonbridge and Malling. For personalised approval odds and nearby comparables, get the full report above.
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