Tower Hamlets, London
Dormer loft conversion drawings in Tower Hamlets
Dormer loft conversion drawings for a Tower Hamlets house start at £695 including VAT. Few homes here are houses, and the ones that are sit among 59 conservation areas and 64 Article 4 directions, so the address check comes before the design.
From £695 (VAT included)
- MCIAT chartered
- £2m PI insured
- LABC Partnered
- Fixed fees, VAT included
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Tower Hamlets's planning rules for dormer loft conversions
We do not quote a fixed dormer dimension for Tower Hamlets, because we publish only figures we have checked against the council's documents. The borough's framework is the Tower Hamlets Local Plan 2031: Managing Growth and Sharing the Benefits. Its supplementary guides include the Central Area Good Growth SPD and the High Density Living SPD, and a house dormer is judged on the plan's design policies and on the character of its street.
That puts weight on the setting. A roof in a conservation area is read against the area's own character, and a roof outside one against the pattern of the houses around it. We draw both views, and we are plain with owners when a dormer is unlikely to sit well.
Where the roof is visible from the street, a rear dormer with rooflights to the front keeps the street-facing slope as it is, and we price the design on that basis unless the survey shows otherwise.

Local figures for Tower Hamlets
| Measure | Value | Period | Source |
|---|---|---|---|
| Conservation areas | 59 named conservation areas published by the council | — | planning.data.gov.uk |
| Article 4 directions | 64 Article 4 directions published by the council | — | planning.data.gov.uk |
| Article 4 direction areas | 63 Article 4 direction area polygons published by the council | — | planning.data.gov.uk |
| Listed building entries | 916 list entries (Historic England, within the LPA boundary) | — | planning.data.gov.uk |
| Households living in a house | 12 % of households living in a house or bungalow (detached, semi-detached or terraced) | Census 2021 | nomisweb.co.uk |
| Householder decisions | 191 decisions | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder applications granted | 92.7 % | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder applications decided in time | 95.8 % decided within 8 weeks or an agreed extended period | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| GPDO 2015 Sch 2 Pt 1 Class B, para B.1(d) | 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume | — | legislation.gov.uk |
| Class B, para B.1(f) | Class B roof enlargements are not permitted development on article 2(3) land | — | legislation.gov.uk |
A blank value means the figure has not been published, not that there are none. Check your own address with the council.
Loft enlargement in section: the permitted development limits
A dormer on the rear slope, with the limits that decide whether it needs planning permission.
- A · Extra roof volume allowed
- 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume
- B · Set-back from the eaves
- Original eaves maintained; enlargement set at least 0.2 m from the eaves measured up the roof slope, so far as practicable (not required for hip-to-gable or roofs joining a rear/side extension)
- C · Height limit
- No part higher than the highest part of the existing roof
Article 4 directions and conservation areas
Tower Hamlets has published 64 Article 4 directions covering 63 mapped areas, and has 59 conservation areas. A direction can remove permitted development for roof alterations, and inside a conservation area the national position applies: Class B roof enlargements are not permitted development on article 2(3) land.
Historic England records 916 listed entries in the borough, 21 at Grade I and 39 at Grade II*. A listed house needs its own consent for roof work, and a house next to a listed building is judged with that setting in mind.
That is why this page starts with the address. Before we quote, we check it against all three layers, and we tell you which route applies.
A borough of few houses
Only 12 per cent of households here live in a house or bungalow, and 23.1 per cent own their home. Houses that carry a loft are a small, specific group, and each needs its own check.
For those houses the national limit for a rear dormer still applies where the rights remain: 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume. Anything earlier owners added counts towards it, so we ask for the planning history.
Garden land is scarce too, with 7.4 per cent of the borough's land recorded as domestic garden in the national land-use database. A dormer adds space without taking any of it.
A dormer here often has to work around a shared stair, a party wall in older brickwork or a roof that carries a neighbour's chimney. The survey records all of it, and the engineer sees the actual structure, not an assumption, before the steel is sized.
How Tower Hamlets decides householder applications
In the latest published year Tower Hamlets decided 191 householder applications, and granted 92.7 per cent. 95.8 per cent were decided within eight weeks or an agreed extension.
A small sample moves a lot from year to year, so we treat these figures as background only. They cover every kind of householder work and cannot tell you what will happen to one dormer.
Because the sample is small, we also look at your own street. If the neighbours have had loft work approved, the drawings reference it, and if they have not, we say that in the covering note so you can weigh the risk before the application fee is spent.
What the Tower Hamlets dormer drawings include
A set shows the existing and proposed plans, the roof in section with the dormer and flat-roof build-up, all elevations, and the location and block plans. The new stair follows the loft standard: Loft conversions where 2.0 m cannot be achieved: 1.9 m at the centre of the stair, 1.8 m at the side (half width). The price is £695 including VAT, fixed up front, and a second chartered technologist checks each sheet.
For a lighter scheme, see loft conversion drawings in Tower Hamlets. If you are also changing the back of the house, house extension drawings in Tower Hamlets cover that.
Dormer drawings across the East End
Each neighbour has its own guidance. Compare dormer loft conversion drawings in Newham, in Southwark or in Lewisham. For the borough, start at architectural drawings in Tower Hamlets, or read the national rules on the dormer loft conversion drawings hub.
What you receive


Related pages
Other services in Tower Hamlets
Dormer loft conversion drawings nearby
Questions
Does Tower Hamlets set fixed dormer dimensions?
We do not quote a fixed figure. A house dormer is read against the Tower Hamlets Local Plan 2031: Managing Growth and Sharing the Benefits and the character of the street, so we draw it in that context.
Do I need planning permission for a dormer in Tower Hamlets?
Often. The borough has 59 conservation areas, where a roof enlargement is not permitted development, and 64 Article 4 directions that can remove rights elsewhere.
Can I add a dormer to a listed house in Tower Hamlets?
It needs listed building consent as well as any planning permission. Historic England lists 916 entries in the borough.
How much do dormer loft conversion drawings cost in Tower Hamlets?
From £695 including VAT, fixed up front. Council fees are separate.
Sources and dates
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- nomisweb.co.uk, retrieved
- assets.publishing.service.gov.uk, retrieved
- legislation.gov.uk, retrieved
- towerhamlets.gov.uk, retrieved
- towerhamlets.gov.uk, retrieved
- nomisweb.co.uk, retrieved
- data.london.gov.uk, retrieved
- gov.uk, retrieved
- Contains public sector information licensed under the Open Government Licence v3.0.
- Contains OS data © Crown copyright and database right 2026.
- Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
- Contains Historic England data © Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026.

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