Rear dormer drawings for Havering roofs — the box across the back slope that turns a low attic into a full-height room, drawn to Havering Council's guidance and the volume limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Havering Council granted 85% of the householder planning decisions it made in its latest published year — 2 points below the 87% England-wide householder average. Green Belt coverage across the east restricts the scale of extensions and any new outbuildings on affected plots, which is where a policy-literate drawing pack earns its keep. Its dominant interwar (1918–1939) and postwar (1945–1970) housing stock sets the design brief on most streets.
Under Class B, a rear dormer stays permitted development up to 40m³ of added roof volume on a terrace or 50m³ on a semi-detached or detached house, while Class A allows a single-storey rear extension of 3m beyond the original rear wall on a terrace and 4m on a detached house before a full application is needed. Havering carries at least one Article 4 direction, and conservation areas including Langtons (Hornchurch), Upminster (Tithe Barn) and Rainham Village remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Havering is determined against an 8-week statutory target.
Romford (denser interwar and postwar housing around the town centre and Marshalls Park), Hornchurch (interwar semis and the Langtons conservation area), Upminster (larger suburban homes near the Tithe Barn conservation area), Emerson Park (low-density detached houses on generous plots under Article 4), Rainham (historic village core alongside newer housing near the Thames marshes) and Elm Park (planned interwar semi-detached suburb) — these are the Havering pockets our drawings cover most. Heritage designations here include Langtons (Hornchurch), Upminster (Tithe Barn), Rainham Village, Emerson Park and Corbets Tey. Havering Council weighs each proposal against Havering Local Plan 2016–2031 and the borough's residential extensions and alterations guidance, where generous plot sizes make front-of-house impact and the gaps between detached homes a key design test. On roofs the borough is hipped roofs on the suburban semis and gabled roofs on the detached and older stock, over interwar and postwar semi-detached houses, detached houses on larger plots and village-core cottages and period frontages.
The box dormer is the workhorse loft, and most of Havering is built for it — the borough runs to interwar and postwar semi-detached houses, detached houses on larger plots and village-core cottages and period frontages under hipped roofs on the suburban semis and gabled roofs on the detached and older stock, and a flat-roofed box across the rear slope is the cheapest cubic metre of full-height space those roofs give up. Havering Council tests the dormer against Havering Local Plan 2016–2031 and the borough's residential extensions and alterations guidance, and because permitted development turns on a number, the volume you propose against the volume you have left is the first thing an officer or a certificate checks.
That is why the arithmetic goes on the drawings. We calculate the box against the 40- or 50-cubic-metre allowance, count any earlier roof enlargement into the total, hold the flat roof below the ridge and set the face back off the eaves so the dormer reads as subordinate. Green Belt coverage across the east restricts the scale of extensions and any new outbuildings on affected plots, so the cheeks, the window line and the material are drawn to answer it rather than invite a query.
Where Havering's streets are protected — Langtons (Hornchurch), Upminster (Tithe Barn), Rainham Village, Emerson Park and Corbets Tey among them — the Class B dormer right is switched off and even a modest rear box needs consent. Prized low-density enclaves such as Emerson Park sit under Article 4 controls, and with much of eastern Havering falling inside Metropolitan Green Belt, extension potential is tightly held on the borough's fringes. We confirm the designation before the box is sized.
Many rear dormers in Havering are permitted development, but the volume and position decide it. You will normally need a full application to Havering Council if any of these apply:
We draw the box within its volume allowance, the flat roof below the ridge and the face set back off the eaves — the three things a dormer stands or falls on — and submit a validation-complete pack, whether that is a lawful development certificate or a full householder application.
Below is Havering Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Havering grants a fair majority of householder applications, with extensive Green Belt on its eastern side the main brake on what larger schemes can achieve. A dormer is decided on volume and set-back, so a pack that shows the calculation and the eaves detail is cleared faster and refused less often than a DIY submission.
Source: MHCLG planning application statistics (householder decisions, rolling year). Compare every borough on our London approval-rate league table.
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Across Romford, Hornchurch and Upminster, the dormer that goes through is the subordinate rear box: flat roof kept low, cheeks clad to recede, side windows obscure-glazed against overlooking, and the whole thing set back so the original eaves line still reads from the garden. On hipped roofs on the suburban semis, this returns a full-height double and en-suite from what was standing-room-only, usually inside the permitted-development volume.
Generous plot sizes make front-of-house impact and the gaps between detached homes a key design test. We keep the box off the ridge, match the cheek material to the roof, and where the volume is already spent — or the street is designated — draw the dormer as a householder application composed to Havering Council's roof-alteration guidance rather than push a certificate that would be refused.
We draw rear dormers on the terraced and semi-detached streets across the borough. A few of the neighbourhoods where Havering dormers come up most often:
Dormer loft drawings for Romford's denser interwar and postwar housing around the town centre and Marshalls Park — volume-checked, set-back-detailed and drawn to Havering Council's guidance.
Dormer loft drawings for Hornchurch's interwar semis and the Langtons conservation area — volume-checked, set-back-detailed and drawn to Havering Council's guidance.
Dormer loft drawings for Upminster's larger suburban homes near the Tithe Barn conservation area — volume-checked, set-back-detailed and drawn to Havering Council's guidance.
Dormer loft drawings for Emerson Park's low-density detached houses on generous plots under Article 4 — volume-checked, set-back-detailed and drawn to Havering Council's guidance.
Dormer loft drawings for Rainham's historic village core alongside newer housing near the Thames marshes — volume-checked, set-back-detailed and drawn to Havering Council's guidance.
Dormer loft drawings for Elm Park's planned interwar semi-detached suburb — volume-checked, set-back-detailed and drawn to Havering Council's guidance.
Whether a dormer in Havering needs permission comes down to where it sits and how big the box is. This is how the cases compare.
| Dormer type | Permitted development? | What it gains | What Havering Council checks |
|---|---|---|---|
| Rear box, within volume | Usually yes | Full-height room across the back | Volume total, 20cm eaves set-back |
| Rear box, over volume limit | No — full application | A larger room | How far over the allowance, bulk |
| Front or side dormer | No — full application | Light to the front rooms | Visibility from the street, character |
| Dormer in a conservation area | No — full application | Same space, extra scrutiny | Roof form and street appearance |
In conservation areas such as Langtons (Hornchurch) and Upminster (Tithe Barn), Class B dormer rights are removed and every dormer needs a full application.
A fixed process built around how Havering Council validates and decides dormer applications — most drawings are submission-ready within seven days of survey.
Send us your Havering postcode and roof type. We confirm your conservation and Article 4 status, work out how much permitted-development volume you have left, and score your odds against live Havering Council decisions.
We measure ridge and eaves heights, roof pitch and the existing loft floor — the numbers the volume calculation, the set-back and the head heights depend on.
Chartered designers develop the box to your brief, drawn inside the Class B volume limits or, where those are exhausted or removed, to Havering Council's roof-alteration guidance.
We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Havering Council issues its decision.
Often not. A rear box dormer within 40 cubic metres on a terrace, or 50 on a semi or detached house, set back at least 20 centimetres from the eaves and kept below the ridge, is usually permitted development. In Havering you will need a full application to Havering Council for a front or side dormer, a box that exceeds the volume, and any dormer in a conservation area such as Langtons (Hornchurch) and Upminster (Tithe Barn), where those rights are removed.
The permitted-development limit is a volume, not a footprint: 40 cubic metres of added roof space on a terraced house and 50 on a semi-detached or detached one, and any earlier loft enlargement counts against that total. In Havering the box must also sit below the ridge and back from the eaves. We measure your roof and calculate the exact volume you have left before drawing. Havering Council is the decision-maker.
Not under permitted development. A dormer on the front roof slope, or one facing a highway, always needs a full application to Havering Council, because it changes how the house reads from the street. Rear box dormers are far more likely to be approved — or to be permitted development outright — which is why almost every Havering dormer we draw sits on the back slope.
Often, on a terrace or semi. If the dormer or the loft steelwork meets the party wall with your neighbour, the Party Wall etc. Act applies and notice must be served before work starts — separately from Havering Council's planning decision. We flag the party-wall junction on the drawings so a surveyor can be appointed early and the build is not held up.
If your dormer is permitted development, a lawful development certificate from Havering Council is council-stamped proof of it — worth holding, because a buyer's solicitor will ask for it when you sell. We prepare and submit the certificate with the same measured drawing pack that shows the box within its volume allowance.
We price each Havering dormer individually, because the roof pitch and the volume left vary house to house, and send a fixed, no-obligation quote within one working day. It covers the full drawing pack with free revisions until Havering Council approves, and we confirm at the outset whether your box is permitted development or needs an application. Call 020 7864 7245 to start.
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