Upminster / Cranham — covered by Havering Council.
Planning permission drawings delivered by an MCIAT chartered team.
Building regulations drawings delivered by an MCIAT chartered team.
Loft conversion drawings delivered by an MCIAT chartered team.
House extension drawings delivered by an MCIAT chartered team.
Mansard roof extensions delivered by an MCIAT chartered team.
Garage conversion drawings delivered by an MCIAT chartered team.
Basement conversion drawings delivered by an MCIAT chartered team.
Structural calculations delivered by an MCIAT chartered team.
Measured building survey delivered by an MCIAT chartered team.
Party wall services delivered by an MCIAT chartered team.
Rear dormer drawings delivered by an MCIAT chartered team.


RM14 primarily covers Upminster / Cranham in Havering.
Decisions for RM14 are made by Havering Council. Standard Permitted Development rules apply for most rear extensions and loft conversions on terraced and semi-detached houses, unless the property is in a conservation area, is listed, or sits under an Article 4 Direction. Article 4 in Havering: No.
Building regs from £950. We do not charge hourly. Free site survey across all RM14 addresses.
From first call to planning decision: typically 12–14 weeks. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination. Havering Council timelines align with the national norm.
Upminster / Cranham in RM14 is characterised by the housing stock of Havering — broadly 1930s semi-detached dominates hornchurch and upminster.

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Every RM14 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. RM14 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| RM14 | Upminster / Cranham | 1930s semi-detached, Edwardian villas | Upminster / Cranham sits wholly inside RM14, so Havering Council validates every drawing package submitted from an RM14 address. |
| RM14 | Upminster | 1930s semi-detached, Edwardian villas | Upminster sits inside RM14; drawing package proposals here are determined by Havering Council. |
| RM1 | Romford Central | Victorian terraces, 1930s semi-detached, post-war flats | Adjoining district to RM14, also inside Havering for drawing package purposes. |
| RM2 | Gidea Park | Victorian terraces, 1930s semi-detached, post-war flats | Adjoining district to RM14, also inside Havering for drawing package purposes. |
| RM3 | Harold Hill | Post-war estate | Adjoining district to RM14, also inside Havering for drawing package purposes. |
| RM4 | Havering-atte-Bower | mixed stock | Adjoining district to RM14, also inside Havering for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few RM14 streets, and each one changes what a drawing package can achieve at that address.
How designation changes a RM14 (Upminster / Cranham) drawing package: Havering Council maintains 15 conservation areas, including Romford Market, Upminster, Hornchurch. Inside any of them a RM14 (Upminster / Cranham) drawing package 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. Hornchurch sets the tone for RM14 (Upminster / Cranham) casework.
RM14 (Upminster / Cranham) permitted development status: there is no borough-wide direction from Havering Council, so a drawing package at a RM14 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a RM14 (Upminster / Cranham) sale to argue it later.
The building fabric around RM14 (Upminster / Cranham): 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. A drawing package in RM14 (Upminster / Cranham) is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Havering Council.
Sources for this RM14 drawing package 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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