The single-storey rear extensions, lofts and side additions a Havering owner can build without applying, and every exception that bites. One thing worth knowing before you start: across the twelve quarters ending March 2026 the council issued 128 enforcement notices and served 25 breach of condition notices; the equivalent figures for all 33 boroughs are 3,554 and 400 (MHCLG planning statistics, retrieved 1 September 2026). Havering handles roughly one in thirty-four of the capital's planning decisions and one in sixteen of its breach of condition notices. Conditions are what this borough polices.
On a Hornchurch or Upminster semi the loft allowance is 50m³, a full 10m³ more than a terrace gets, and Havering has no borough-wide Article 4 direction to take it away. A 3m rear extension is outright; 6m runs through prior approval, determined in six weeks after a 21-day neighbour consultation.
| House | Allowance | What counts against it |
|---|---|---|
| 1930s semi, Hornchurch or Upminster | 50m³ | Any previous dormer or roof enlargement |
| Detached, Emerson Park | 50m³ | As above |
| Victorian terrace, central Romford | 40m³ | As above |
| Post-war terrace, Harold Hill | 40m³ | As above |
| Purpose-built flat or maisonette | none | No Class B right exists |
| Anything in a conservation area | rear only | Side and front dormers not permitted |
Class B, Schedule 2 Part 1, GPDO 2015 as amended. Volume is measured against the roof as it stood on 1 July 1948, or as originally built if later, so a dormer added by a previous owner in 1998 still comes off your 50m³. This catches more Havering owners than anything else in the order, because the 1930s stock has had two generations of alteration and none of it is recorded on your deeds.
Single-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. These rights attach to a dwellinghouse, and a flat or a maisonette is not one for this purpose: Schedule 2, Part 1 of the Town and Country Planning (General Permitted Development) (England) Order 2015 puts them outside the whole of it. The practical effect in Havering is that virtually any external alteration to a flat, down to changing a window frame material, starts life as a planning application.
Yes, and by more than most owners expect. Inside a conservation area the side extension goes first, and the two-storey rear addition with it. Cladding of any description stops being automatic, taking down a chimney stack needs consent, and the roof enlargement right is withdrawn, which removes the dormer. What is left is a modest single-storey rear extension and rooflights, and even those have to be in matching materials.
A lawful development certificate is the council stating in writing that what you intend to build requires no permission. It grants nothing, and it is not a rescue if the scheme turns out to fall outside the allowances. The fee is half the householder application charge, so £274 against £548. Havering recorded 1,637 of them over the twelve quarters to March 2026 while serving only 23 planning contravention notices, which is the exploratory step a council takes before it acts. This authority tends not to take it.
Yes. Planning and building regulations are two separate consents with separate legislation behind them, and permitted development disposes only of the planning half. Structure, insulation, fire escape, drainage and ventilation all still require building control sign-off, from Havering's own team or from an approved inspector. We draw the planning set and the building regs drawings from a single survey, so the two never disagree with each other.



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Each Havering postcode district we work in, what was built there, and which authority signs off a permitted development scheme in it. The charges listed are the statutory England application rates for 2026 and describe paperwork, not building work.
| Postcode | Area | Dominant stock | What it means for a permitted development scheme |
|---|---|---|---|
| RM4 | Havering-atte-Bower | Havering was built between the wars and immediately after them: 31.9% of its 108,670 dwellings date from the 1930s and a further 28.0% from 1945 to 1964, while only 1.7% were built before 1900 (VOA CTSOP4.1 build-period table, 31 March 2025). Hornchurch and Upminster hold the inter-war semis, Harold Hill the post-war estates, and the older centre of Romford what little Victorian stock the borough has. | A permitted development scheme at an RM4 address in Havering-atte-Bower is determined by Havering Council under its own Local Plan policies for Havering-atte-Bower. |
| RM5 | Collier Row | 1930s semi-detached | Collier Row sits wholly inside RM5, so Havering Council validates every permitted development scheme submitted from an RM5 address. |
| RM7 | Romford / Rush Green | Victorian terraces, 1930s semi-detached, post-war flats | RM7 is Romford and Rush Green, entirely inside the borough. Plots here are tighter than in the east of Havering and the stock is mixed inter-war and post-war, so the rule that usually stops a scheme is not the depth allowance but the requirement that buildings cover no more than half the curtilage. |
| RM11 | Hornchurch / Emerson Park | 1930s semi-detached | RM11 takes in Hornchurch and Emerson Park. Emerson Park is the borough's large-plot detached quarter, where a 4m single-storey rear projection, or 8m through prior approval, still leaves the curtilage well under the 50% coverage ceiling that constrains tighter districts. |
| RM12 | Hornchurch / Elm Park | 1930s semi-detached | RM12 covers Hornchurch and Elm Park and is almost uniformly semi-detached. On an attached house the rear allowance is 3m, extended to 6m by prior approval, and any part of it standing closer than two metres to a boundary is capped at 3m to the eaves. That last condition is what reshapes most Elm Park schemes. |
| RM13 | Rainham / Wennington | 1930s semi-detached | RM13 is Rainham and Wennington, and this is the district where the flood map matters. Just under a tenth of Havering's land area falls inside Flood Zone 3, concentrated on the marshes here (Environment Agency flood zone extents, retrieved 1 September 2026). A zone 3 address needs a Flood Risk Assessment lodged with the application. That is a documentation requirement driven by the undefended extent of the river, and not a statement about your house. |
| RM14 | Upminster / Cranham | 1930s semi-detached, Edwardian villas | Upminster / Cranham sits wholly inside RM14, so Havering Council validates every permitted development scheme submitted from an RM14 address. |
| RM1 | Romford Central | Victorian terraces, 1930s semi-detached, post-war flats | RM1 covers Romford Central only; Havering Council handles the permitted development scheme. |
Two Havering houses on the same road can take quite different schemes. The pitch of the roof, the thickness of the wall build-up and the depth behind the back wall all vary, and between them they set the ceiling on what is achievable without applying.
What designation actually costs you here: in the protected areas at Rainham Village, Romford Market and Upminster, the permitted development route simply closes. A scheme that would have run through as a £249 prior approval in about six weeks becomes a £548 householder application decided in eight, and it has to be won on design merit rather than on an allowance. Upminster is the designation that most often changes what we are able to draw.
No blanket Article 4 over Havering: Havering Council has not withdrawn permitted development across Havering, so a permitted development scheme outside a Havering conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a RM1 owner wants on file.
Havering housing stock: 1930s semi-detached dominates Hornchurch and Upminster; post-war in Harold Hill and Romford; Victorian in older Romford centre. Outer east London; Metropolitan Green Belt covers north of the borough; permissive residential planning; strong PD use. Read that before choosing a permitted development scheme route in Havering — construction, not postcode, sets what is achievable.
Sources for this Havering 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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