Croydon, London
Loft conversion drawings in Croydon
Loft conversion drawings in Croydon start at £695 including VAT. Croydon is a house-heavy borough, with 60.2 per cent of households living in one, and its planning record is encouraging: 86.6 per cent of householder applications were granted in the latest published year.
From £695 (VAT included)
- MCIAT chartered
- £2m PI insured
- LABC Partnered
- Fixed fees, VAT included
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Croydon's conservation guidance and what it means for a loft
Croydon does not set a published headroom or dormer-size figure for lofts that we can quote, so the document that matters most is the council's Conservation Areas General Guidance SPD. It applies in the borough's 19 conservation areas, and inside any of them a roof enlargement cannot rely on permitted development, which turns most lofts there into planning applications.
The wider framework is the Croydon Local Plan 2018, adopted in 2,018. Outside conservation areas a loft is usually judged on how it sits with the street: whether it matches the roof pattern, keeps clear of the front slope and avoids overlooking the gardens behind.
For you, the consequence is simple. We check your address against the conservation area boundary first, because it decides the route and the design together. A loft that is only a rear dormer on an unlisted house in an ordinary street can be a very different project from the same dormer in a protected road.

Local figures for Croydon
| Measure | Value | Period | Source |
|---|---|---|---|
| Conservation areas | 19 named conservation areas published by the council | — | planning.data.gov.uk |
| Listed building entries | 180 list entries (Historic England, within the LPA boundary) | — | planning.data.gov.uk |
| Green Belt share of the council area | 25 % of council area covered by green-belt polygons | — | planning.data.gov.uk |
| Households living in a house | 60.2 % of households living in a house or bungalow (detached, semi-detached or terraced) | Census 2021 | nomisweb.co.uk |
| Owner-occupied households | 54.7 % of households owner-occupied (owned outright or with mortgage/loan) | Census 2021 | nomisweb.co.uk |
| Householder decisions | 786 decisions | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder applications granted | 86.6 % | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder applications decided in time | 94.4 % 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(c) | No enlargement beyond the plane of a roof slope that forms the principal elevation and fronts a highway | — | 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 |
| Approved Document K 2013, para 1.13, Diagram 1.4 | 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) | — | gov.uk |
| Approved Document B Vol 1, para 2.21 | New storey above 4.5 m by loft conversion: protect the full escape route with fire-resisting doors (min E 20) and partitions (min REI 30) | — | gov.uk |
A blank value means the figure has not been published, not that there are none. Check your own address with the council.
Householder applications by street in Croydon
| Street | Applications | Approved |
|---|---|---|
| Devonshire Way | 35 | 56% |
| Mount Park Avenue | 30 | 79% |
| Farley Road | 28 | 85% |
| Chaldon Way | 25 | 92% |
| Norbury Hill | 24 | 82% |
| Pollards Hill South | 24 | 63% |
| Bradmore Way | 23 | 87% |
| Woodcote Valley Road | 23 | 76% |
| Littleheath Road | 22 | 64% |
| Valley Road | 22 | 64% |
| Shirley Road | 21 | 74% |
| Upfield | 20 | 65% |
| Arkwright Road | 19 | 83% |
| Georgia Road | 19 | 63% |
| Caterham Drive | 18 | 78% |
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
Permitted development, certificates and listed buildings
Where a house is outside the conservation areas and no direction removes its rights, a loft can be permitted development as long as it keeps within the national volume limit, stays off a roof slope facing the highway and adds no balcony. A Lawful Development Certificate in Croydon confirms it in writing. That paper matters when you later sell, because a buyer's solicitor will ask for proof that the loft is lawful and was built as drawn.
If the loft needs planning permission, the work is drawn as in our planning drawings in Croydon. Historic England lists 180 entries in the borough, and a listed house needs listed building consent for most roof work, whatever its conservation area status.
About 25 per cent of Croydon is Green Belt, and that does not usually change the rules for a loft inside the existing roof. It can affect how much the dormer adds, so it is another thing we check by address.
Measuring up houses of different ages
Roofs differ from house to house, so we survey the actual roof, recording ridge height, pitch, rafter depth and the way the party walls run, then place it on the same datum as the floors below.
From that survey we can say how much floor space a dormer or hip-to-gable change can add, where the staircase lands and what the structure needs. The structural engineer works from the same dimensions, which keeps the later building regulations drawings in Croydon consistent with the planning set.
54.7 per cent of Croydon households own their home. For an owner staying put, the aim is a conversion that keeps a usable bedroom and a bathroom without costing the floor below its best room.
How Croydon decides householder applications
Croydon decided 786 householder applications in its latest published year and granted 86.6 per cent. 94.4 per cent were decided within eight weeks or an agreed extension, so a clean, complete application gives the council what it needs to decide on time.
These numbers cover every kind of household project, from porches to extensions, and say nothing about your roof. We use them to set expectations on timing, not to promise a result.
What you receive and what it costs
A Croydon loft set shows the existing and proposed floor plans, the new stair, the roof in section, all four elevations and the location and block plans. Loft conversion drawings start at £695 including VAT, agreed before you commit, and are normally ready about a week after the survey.
A second chartered technologist checks every sheet before it is submitted. If the council asks for changes, we redraw at no extra charge until the application is decided.
Related drawings and neighbouring boroughs
A hip-to-gable conversion or a dormer? Start with dormer loft conversion drawings in Croydon. Adding space at the back too? See rear extension drawings in Croydon. The whole range is at architectural drawings in Croydon. Over the boundary, compare Bromley and Sutton.
What you receive


Related pages
Other services in Croydon
Questions
Do I need planning permission for a loft conversion in Croydon?
It depends on your address. Inside any of Croydon's 19 conservation areas a roof enlargement is not permitted development. Elsewhere a loft may be permitted development, which a Lawful Development Certificate can confirm.
How much do loft conversion drawings cost in Croydon?
From £695 including VAT, fixed up front. Council application fees are paid to the council separately.
Which Croydon document covers conservation areas?
The council's Conservation Areas General Guidance SPD. It sits alongside the Croydon Local Plan 2018 and is read for any alteration in a conservation area.
How quickly does Croydon decide householder applications?
In the latest published year, 94.4 per cent were decided within eight weeks or an agreed extension. That is a borough-wide average for all household projects.
Sources and dates
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- nomisweb.co.uk, retrieved
- nomisweb.co.uk, retrieved
- assets.publishing.service.gov.uk, retrieved
- legislation.gov.uk, retrieved
- gov.uk, retrieved
- gov.uk, retrieved
- croydon.gov.uk, retrieved
- croydon.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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