Planning permission in East Suffolk
95.3% of householder applications here were approved. Real figures from the council's own statutory returns, so you can design for what actually gets through.
Figures cover 2025 Q2 to 2026 Q1 and come from the MHCLG district planning application statistics, the returns every English planning authority is required to file. Article 4 and conservation area counts come from the government Planning Data platform. Last refreshed 2026-08-16.
What the numbers actually say
Householder planning in East Suffolk is far more predictable than most people assume. Over 2025 Q2 to 2026 Q1 the council decided 1,008 householder applications and approved 95.3%. 47 were refused. That puts it 8 of 45 in East of England on approval rate.
Speed is the other half of the story. 86.8% of those decisions landed inside the eight week statutory target, broadly in line with most authorities.
Permitted development here
No Article 4 directions for East Suffolk have been published to the government Planning Data platform. That is not the same as none existing. Plenty of authorities have directions in force that they have not published as open data, so check the council's own policy map before you commit to a design.
45 conservation areas are mapped in East Suffolk. Inside one you lose roof extensions under Class B entirely, and you lose the larger rear extension route.
The route most people miss
21 larger householder extension applications were made here in the year. That is the prior approval route which lets a terraced or semi detached house go beyond three metres without a full application, and 90.5% of them got through. It is a genuinely usable route and most homeowners have never heard of it.
What can you build in East Suffolk?
The rules above are the council's. The Project Calculator applies them to your house: pick the type, drag the extension, and get a verdict and a cost for your postcode.
Open the Project Calculator 60 secondsWhat it costs
Extnd estimates, not council data. Regional labour rates move these but the shape holds.
Single storey rear extension
Typically £42,000 to £95,000, most landing near £62,000.
See the breakdown →Cost guideLoft conversion
Typically £38,000 to £90,000, most landing near £58,000.
See the breakdown →Cost guideSide return infill extension
Typically £45,000 to £98,000, most landing near £66,000.
See the breakdown →Other councils in East of England
Rules and approval rates change at the boundary.
Thinking about an extension in East Suffolk?
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What can I help with?
Planning permission, permitted development, what things cost, or what your council actually approves.
Guidance, not a lawful development certificate. For your house, use the Project Calculator.