Croydon rear extension drawings for £589
Croydon’s May 2026 validation list asks even a kitchen extension in Thornton Heath or Purley for a flood note and a fire statement. We draw the extension and write both.
- £439 drawings + £150 survey (£589 total)
- Flood and fire notes written
- We submit to Croydon
How much are rear extension drawings in Croydon?
£589 in total: £439 for the drawings and submission plus £150 for our measured survey, and no VAT to add. Croydon Council’s planning fee is separate and paid to the council. Croydon charges no CIL on house extensions, so there is no levy bill to budget for.
Your Croydon set
- Measured survey of the house, garden levels and the neighbours’ rear windows
- Existing and proposed plans and elevations, plus long and short sections through the extension
- Block plans at 1:200 or 1:500 with boundaries, trees and the houses either side
- A short flood statement and the fire safety statement Croydon expects with every application
- Photographs gathered in a separate document, as the council asks, and the submission itself
| Our drawings and submission paid to us | £439 |
|---|---|
| Measured survey paid to us | £150 |
| Council householder fee paid to the council | £548 |
| Total | £1,137 |
We charge £589 in total. The £548 is paid to the council when the application goes in, and the survey is charged once if you later order building regulations drawings for the same house.
Two notes Croydon wants that most councils do not
Croydon’s list says every application needs a flood risk assessment, even outside the flood zones. For a householder extension that can be a brief statement, a look at the online flood maps and simple measures such as a water butt or permeable paving (Croydon validation list). The same list asks every application for a fire statement or fire safety exception statement under London Plan policy D12.
Neither is a big job, and we write both from what we see on the survey. What matters is that they are in the pack on day one, because a missing document is the usual reason a Croydon application sits unvalidated.
- Sections: long and short, through the building, with levels shown
- Photographs: in their own confidential document, with no faces, number plates or views into neighbours’ windows
- Green Belt or Metropolitan Open Land: a calculation of the original floor space and volume
Conservation areas and Article 4 in Croydon
There are 21 conservation areas in Croydon, and Article 4 directions cover three of them: Chatsworth Road, The Waldrons and Kenley Aerodrome (Croydon conservation areas). A conservation area is article 2(3) land, so a rear extension of more than one storey there needs a householder application under Class A.
For example, a single-storey kitchen extension of 3 m on a semi in South Norwood may need no application at all, while the same idea on The Waldrons is worth checking against the direction before anything is drawn.
What happens after we submit
Once the application is validated, Croydon gives an estimated decision date 8, 13 or 16 weeks ahead depending on the type; a householder case sits in the 8 weeks group (Croydon after submission). In the year to June 2026 the council decided 502 of 527 householder applications inside 8 weeks.
On the levy, Croydon says CIL is not charged on extensions or other home adaptations (Croydon CIL). A new draft CIL schedule went to examination on 28 November 2025; that affects new homes, not your extension.
Croydon in figures
- 502 of 527
- Croydon Council householder applications decided within 8 weeks in the year to June 2026, out of all it decided (prior approvals not counted). MHCLG live table PS2, planning application statistics by district, July 2025 to June 2026 (GOV.UK)
- All applications
- Croydon asks every application, householder ones included, for a flood risk assessment proportionate to the scheme. Croydon local validation list, May 2026 (Croydon Council)
- 1:200 or 1:500
- Scales for Croydon’s existing and proposed block plans, showing boundaries, trees and neighbouring properties. Croydon local validation list, May 2026 (Croydon Council)
- 21
- Conservation areas in Croydon, three of them with Article 4 directions. Conservation areas (Croydon Council)
- 8, 13 or 16 weeks
- The decision periods Croydon gives after validation, depending on the type of application. After submitting a planning application (Croydon Council)
- Not charged
- Croydon’s position on CIL for extensions and other home adaptations. Community Infrastructure Levy and Section 106 (Croydon Council)
- 28 Nov 2025
- Date Croydon’s draft CIL charging schedule was submitted for independent examination. Community Infrastructure Levy and Section 106 (Croydon Council)
- £30.30 per m²
- The Mayor of London’s CIL in Croydon (band 3) for permissions granted in 2026, owed only when a scheme is liable for CIL in the first place. Mayoral CIL: annual rate summary for 2026, Table 1 (Greater London Authority)
Croydon rear extension questions
My house is not near a river. Why does Croydon want a flood statement?
Croydon asks every application for one, so it can see the work does not add to surface water flooding. For an extension it is short, and we write it from the flood maps and the survey.
Is a fire statement really needed for a kitchen extension?
Croydon’s list asks every application for a fire statement or a fire safety exception statement. We prepare the short householder version with your drawings.
Will I pay CIL on a Croydon extension?
No. Croydon says CIL is not charged on extensions or other home adaptations.
How long does Croydon take?
A householder application has an 8 weeks target once valid, and Croydon decided most in time in the year to June 2026. We cannot promise a date.
Other services people book with this one
- Prior approval for a larger home extension£349 drawings + £150 survey (£499 total)
- Lawful Development Certificate drawings£389 drawings + £150 survey (£539 total)
- Building regulations drawings£479 drawings + £150 survey (£629 total)
- Side return extension drawings£479 drawings + £150 survey (£629 total)
- Party wall notice£39
Get a fixed price for your Croydon extension
Tell us the street and roughly how deep you want to go. We check the conservation and flood position and reply with a quote.