Outbuilding / garden building in Southwark: Planning Permission Guide
Your guide to outbuildings and garden buildings in Southwark — sheds, home offices, summer houses, and more.
Based on 92 decided applications in Southwark over 12 months (84 granted, 8 refused).
Southwark has numerous conservation areas including Borough, Bermondsey, Dulwich Village, Herne Hill, and Peckham Rye. Dulwich Village has a unique Dulwich Estate Scheme of Management layering private controls over standard planning. Article 4 Directions cover many Victorian terraces. Listed buildings are concentrated along the Thames frontage and around Southwark Cathedral. Flood zones apply near the river.
Recent outbuilding / garden building decisions in Southwark
The 5 most recent decided applications. Addresses redacted to postcode area.
Change of use of rear of ground floor and lower ground floor and outbuilding to HMO
Construction of a garden office.
Works to tree with a TCA: T1- Lime Tree (Front Garden of No. 173) (Tilia sp.) Pollard back to previous pruning points to maintain the est…
T1 Front Garden Box Elder Maple. Crown lift and lateral reduction to suitable growth points as shown to abate nuisance and provide cleara…
Details of condition 4 'Refurbished office suites (inc boardroom) details ' required for Listed bulidng consent 25/AP/2128 'Listed buildi…
These are borough-wide. See the 5 nearest to your address.
Check your address freePermitted 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 London
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 Southwark — your address, your constraints, your council's own recent decisions.
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