Single-storey rear extensions, lofts and side extensions you can build in City of London without full planning — and the exceptions.
Barely, because almost nothing here is a house. The Corporation decided five householder applications in twelve quarters and issued 55 lawful development certificates. Its return records no larger home extension decisions at all, which the publisher treats as not recorded rather than as none.
| Measure | City of London | London |
|---|---|---|
| Householder decisions | 5 | 77,680 |
| Lawful development certificates | 55 | 36,657 |
| Larger home extension decisions | not recorded | 5,576 |
| Listed buildings | 616 | — |
| Extension of time agreed | 76.0% | 34.5% |
Sources: MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026. A zero in this return means the measure was not recorded for that borough, never that no such decisions exist. Listed building counts from the planning.data.gov.uk designation registers. Open Government Licence v3.0.
In detailSingle-storey rear extension up to 3m deep (attached house) or 4m (detached); side extension up to half the original width; loft conversion up to 40m³ (terraced) or 50m³ (semi-detached); single-storey outbuilding within the curtilage; replacement windows and doors. All subject to material match, eaves setback (20cm), and not facing a highway.
No. Permitted Development rights apply only to houses (Class C3 dwellings). Flats and maisonettes require full planning for almost every external alteration.
Yes — significantly reduced. In a conservation area: side extensions and two-storey rear extensions are not PD; cladding is not PD; chimney removal needs planning; roof additions are restricted.
An LDC is a formal confirmation from the council that your proposal is lawful PD — recommended before building, useful when selling. Costs around £103 for council fees + drawings.
Yes. Building regulations are entirely separate from planning. Permitted Development removes the planning requirement only — you still need building control sign-off for structure, insulation, fire safety, drainage, and ventilation. We deliver both planning and building regs drawings.



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Every City of London postcode district we draw in, the stock that dominates it and the authority that validates a permitted development scheme there. City of London fees below are the statutory England rates for 2026, not permitted development scheme estimates.
| Postcode | Area | Dominant stock | What it means for a permitted development scheme |
|---|---|---|---|
| EC1A | Smithfield | Mostly commercial, residential lofts | A permitted development scheme at an EC1A address in Smithfield is determined by City of London Corporation under its own Local Plan policies for Smithfield. |
| EC2Y | Barbican | Listed Brutalist apartments (Barbican Estate) | Barbican sits wholly inside EC2Y, so City of London Corporation validates every permitted development scheme submitted from an EC2Y address. |
| EC3N | Tower Hill / Aldgate | Very limited residential — Barbican Estate (listed post-war) | EC3N covers Tower Hill / Aldgate only; City of London Corporation handles the permitted development scheme. |
| EC4M | St Paul's | Mostly commercial, listed residential | St Paul's sits wholly inside EC4M, so City of London Corporation validates every permitted development scheme submitted from an EC4M address. |
| EC4V | Blackfriars | Very limited residential — Barbican Estate (listed post-war) | EC4V covers Blackfriars only; City of London Corporation handles the permitted development scheme. |
| EC4Y | Temple | Very limited residential — Barbican Estate (listed post-war) | Temple sits wholly inside EC4Y, so City of London Corporation validates every permitted development scheme submitted from an EC4Y address. |
| EC2A | Shoreditch | Warehouse conversions, modern infill | Shoreditch is split at EC2A. Either Hackney Council or City of London Corporation can determine a permitted development scheme here, so the EC2A address is checked against both policies maps first. |
Roof pitch, wall build-up and plot depth change every few City of London streets, and each one changes what a permitted development scheme can achieve at that address.
How designation changes a City of London permitted development scheme: City of London Corporation maintains 27 conservation areas, including St Paul's, Barbican, Smithfield. Inside any of them a City of London permitted development scheme cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Whitefriars sets the tone for City of London casework.
City of London and Article 4: Multiple Article 4 Directions around office-to-residential, demolition, and shopfront changes. A permitted development scheme planned at a EC1A address is checked against that direction first; City of London Corporation publishes the City of London extent, and the EC1A line rarely follows the City of London boundary you would expect.
What City of London is built from: Very limited residential — Barbican Estate (listed post-war), Golden Lane Estate, modern luxury flats; overwhelmingly commercial. Overwhelmingly commercial; residential planning extremely constrained; one of the two highest listed-building densities in London. That mix decides the permitted development scheme route in City of London more than the postcode does.
Sources for this City of London permitted development scheme page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.

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