House Extension Drawings in Rainham RM13
Fixed-fee, MCIAT-chartered house extension drawings for Rainham (RM13) homeowners — London Borough of Havering validation and local constraints handled from the start.
Rainham is an outer-east Havering neighbourhood in RM13 where a small historic village core sits within broad interwar and post-war housing estates stretching toward the marshes. The bulk of our work here is rear and side-return extensions, loft conversions and garden-facing kitchen extensions on family semis and terraces that generally fall within permitted development.
Around the Rainham Village conservation area near Rainham Hall and the church, permitted development rights are trimmed and materials matter, so we detail those schemes to the standard London Borough of Havering expects while keeping the everyday suburban streets efficient and fully compliant.
Planning in Rainham (RM13): what to know before you apply
No published householder Article 4 direction applies in Rainham; the principal constraint is the Rainham Village conservation area, and lower-lying plots near the marshes can attract flood-risk scrutiny. Most surrounding interwar and post-war houses retain normal permitted development rights.
Typical Rainham housing stock
Rainham pairs a tight historic core near Rainham Hall and the medieval church with wide belts of 1930s and post-war semi-detached and terraced housing running out toward the marshes. Most homes are unlisted family houses with generous rear gardens, well suited to rear extensions, side infills and loft conversions.
Streets we regularly draw for in Rainham
Upminster Road North · Lambs Lane South · Brookway · Elizabeth Road
What RM13 is actually built of
Measured from 361 classified residential buildings in RM13, not from a description of the area.
Rainham RM13 housing mix
Residential building form across the RM13 postcode district, from 361 classified buildings.
| Attached on more than one side | 36% |
|---|---|
| Attached on one side | 49% |
| Detached | 15% |
| Median building footprint | 61 m² |
| Addresses per buildingAbove about 2 means flats and maisonettes dominate | 1.46 |
| Buildings classified | 361 |
Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-08-17.
House Extension Drawings for Rainham (RM13) homes: the package and the process
Extension drawings are read for their dimensions. The proposed plan needs depth measured from the original rear wall — not from a previous extension — eaves and ridge heights taken from existing ground level, and the distance to each boundary marked. A site plan showing how much garden remains is what an officer reaches for when the amenity question comes up.
We draw the existing building accurately first, because everything else is measured from it. Where the original footprint has already been added to, that history goes on the drawing: it decides which allowances are still available and it is the first thing an officer checks against the council's own records.
The plot decides the extension type long before taste does. A mid-terrace has depth to work with and an alley if it is lucky; a semi has one clear flank; a detached house can go wide. Reading the building form first is what stops a design being drawn that the plot cannot take.
Which extension types do you draw?
Every London extension is shaped by the plot, the neighbours and the borough's design guidance. We draw them all.
Rear extension
A single-storey rear extension is often permitted development within depth limits — ideal for an open-plan kitchen-diner.
Side-return
Fills the alley beside a Victorian terrace, widening the ground floor without losing garden.
Wraparound
Combines a rear and side-return extension for a transformative ground floor, usually needing planning permission.
Double-storey
Adds space above and below, subject to tighter scale and neighbour-impact scrutiny.
Basement
Creates space downward where footprint is limited, with structural and party-wall care.
Do I need planning permission for a house extension in London?
Single-storey rear extensions within permitted development limits (up to 6m for terraced/semi-detached homes under the larger-home scheme, subject to neighbour consultation) may not need a full application. Wraparounds, double-storeys and anything in a conservation area usually do. We assess your plot and recommend the right route before drawing. The current depth, height and eaves limits are set out in full in the guide to planning permission for a rear extension, and where you would rather one practice ran the design, the application and the building-regulations stage together, Architectural Drawings covers that full scope.
How do you maximise the footprint the council will approve?
We know each borough's depth, height and daylight standards, so we design to the edge of what will be approved rather than guessing — and we check the 45-degree neighbour daylight rule and any rear building line before submission. Where a plot is tight we test a permitted-development scheme against a slightly larger householder application and show you the trade-off in space, cost and timescale, so the drawn scheme is the one that actually maximises value rather than just floor area.
| Extension | Typical route | Package | Fee from |
|---|---|---|---|
| Single-storey rear | Permitted development / householder | Planning + building regs | £1,100 |
| Side-return | Householder planning | Planning + building regs + structural | £1,600 |
| Wraparound | Householder planning | Full package + structural | £2,200 |
| Double-storey | Householder planning | Full package + structural | £2,400 |
House Extension Drawings in Rainham RM13 — FAQs
How far can I extend without planning permission in London?+
Do extension drawings include structural calculations?+
How long do extension drawings take?+
Will my rear extension need a party wall agreement?+
Can I extend a house in a conservation area?+
Do I need planning permission for an extension in Havering?+
How does green-belt land affect my Havering project?+
Can I build a bigger extension because Havering plots are larger?+
How long does Havering Council take to decide?+
How much do planning drawings cost in Havering?+
Get your free Rainham planning assessment
Tell us your Rainham (RM13) address and ambition — we'll confirm feasibility, local constraints and a fixed fee within one working day.