Postcode research for UK homes
Free, real-time planning, conservation and flood data for any UK postcode, with 12 popular renovation types and the rules that apply.
Renovation types
Enter a postcode above to see which renovations are permitted for you.
Single-storey rear extension
Extend the back of your home to create more kitchen/dining space.
Permitted development limits (5)
- Max 4m depth from rear wall (terraced/semi) — up to 6m via prior approval
- Max 6m depth (detached) — up to 8m via prior approval
- Max height 4m (3m within 2m of boundary)
- No more than half the curtilage covered by buildings
- Materials to match existing
Single-storey side extension
Infill or wrap-around extension to the side of your home.
Permitted development limits (4)
- Max width = 50% of original dwelling width
- Max eaves height 3m
- Single storey only under PD
- Materials to match existing
Two-storey rear extension
Two-storey rear extension for a bigger kitchen and bedroom.
Permitted development limits (4)
- Max 3m depth from rear wall (under PD)
- Min 7m from rear boundary
- Obscure-glaze any side-facing windows above ground floor
- Roof pitch to match existing
Loft conversion
Convert the attic into a bedroom, en-suite or office.
Permitted development limits (4)
- Terraced: 40m³ additional roof space; Semi/detached: 50m³
- No raising of the main ridge line
- No extension forward of the principal elevation
- Side windows must be obscure-glazed and non-opening (up to 1.7m)
Basement conversion
Convert or extend a cellar into livable space.
Garden room / outbuilding
Insulated studio, gym or home office in the garden.
Permitted development limits (5)
- Single storey only
- Max eaves 2.5m; max overall 4m (dual-pitched) or 3m (other)
- Within 2m of boundary: max 2.5m overall
- Not forward of the principal elevation
- Max 50% of curtilage covered by outbuildings
Conservatory
Glazed extension to the rear or side of the home.
Permitted development limits (3)
- Max 4m depth (terraced/semi) or 6m (detached)
- Max height 4m (3m within 2m of boundary)
- Materials to match existing
Front porch
Small covered entrance at the front of the home.
Permitted development limits (3)
- Max 3m² ground area
- Max height 3m
- Min 2m from any road or boundary with a road
Kitchen refurbishment
New kitchen — cabinets, worktops, appliances and finishes.
Bathroom refurbishment
New bathroom — sanitaryware, tiling, ventilation, lighting.
Solar PV panels
Roof-mounted solar photovoltaic installation.
Permitted development limits (3)
- Max projection 0.2m from roof slope
- Not higher than the highest part of the roof (excluding chimney)
- Sited to minimise visual impact on front of buildings in conservation areas
Air source heat pump
Replace gas boiler with a low-carbon heat pump.
Permitted development limits (4)
- Max one unit per property
- Min 1m from boundary (relaxed in 2023)
- Max volume 0.6m³
- Noise ≤ 42 dB at neighbouring property
- postcodes.io (Office for National Statistics) — local planning authority, region and parliamentary constituency.
- legislation.gov.uk — primary source for the GPDO 2015, Building Regulations 2010, MEES, Gas Safety and EICR Regulations.
- planningportal.co.uk — plain-language rules for householder projects.
- Braithgate curated registry — conservation areas, Article 4 directions and flood risk heuristics (expanding daily).
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