Enfield rear extension plans from £589
Enfield aims to validate a complete householder application within 5 working days. We send it complete: drawings, tree details and the conservation area check, from Bush Hill Park to Winchmore Hill.
- £439 drawings + £150 survey (£589 total)
- Built to Enfield’s local list
- Submitted for you
How much do rear extension drawings cost in Enfield?
The total is £589: £439 for drawings and submission and £150 for the survey, with no VAT to add. The planning fee itself is paid to Enfield Council. We redraw at no charge until approval if the officer asks for changes.
In the Enfield fee
- A survey that logs any tree with a trunk of 75 mm or more within 15 m of the house
- Existing and proposed plans, elevations and a section, to scale
- A block plan with boundaries, landscaping and any protected trees labelled
- A check of your road against the 2006, 2008, 2009 and 2017 Article 4 directions
- Submission, the validation follow-up and answers to the case officer
| 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.
Getting through Enfield’s validation first time
Enfield’s householder requirements say a correct application is validated within 5 working days of receipt. If something is missing, the council emails, and if the information is not supplied within 21 days the application is withdrawn as invalid and an administration fee is kept (Enfield local list).
Where you think a listed document does not apply, Enfield asks for an Article 12 notice with a short reason. We use that where it is justified rather than padding the pack.
Trees: the Enfield item that catches extensions
A tree assessment is needed where work affects a tree in a conservation area or under a Tree Preservation Order on the site, or within 15 m of the building, counting trees with a trunk diameter of 75 mm or more at 1.5 m above ground. The assessment includes a full tree survey and root protection areas on the layout.
For instance, a rear extension in Grange Park, where large garden trees are common, often needs one. We flag it after the survey so it is booked before submission, not after a validation letter.
Conservation areas and Article 4 in Enfield
Enfield has a layered set of directions (Enfield Article 4): Article 4(2) directions from 26 January 2006 across conservation areas including Bush Hill Park, Clay Hill, Forty Hill, Hadley Wood, Southgate Green and Winchmore Hill; a 2008 direction for Grange Park, Meadway and The Crescent; a 2009 one for Abbotshall Avenue; and an Article 4(1) direction for Enfield Town in force since 8 January 2018. In any conservation area a rear extension of more than one storey is outside Class A.
The levy rarely matters. Enfield’s 2016 CIL schedule charges residential space at £40, £60 or £120 per square metre depending on the area (Enfield CIL), but an extension under 100 m² is exempt under regulation 42. Decisions run to an 8 weeks statutory period; Enfield made 851 of 920 householder decisions inside it in the year to June 2026.
Enfield extensions: the numbers
- 851 of 920
- Enfield 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)
- 5 working days
- Enfield’s aim for validating a householder application that arrives with the right documents. Local validation requirements: householder applications (Enfield Council)
- 21 days
- Time Enfield allows for missing information before an invalid application is withdrawn. Local validation requirements: householder applications (Enfield Council)
- 15 m
- Distance from the building within which an affected tree in a conservation area or under a TPO needs a tree assessment. Local validation requirements: householder applications (Enfield Council)
- 75 mm
- Trunk diameter at 1.5 m above ground from which Enfield counts a tree for that assessment. Local validation requirements: householder applications (Enfield Council)
- 8 Jan 2018
- Date the Enfield Town Article 4(1) direction took effect, replacing the 2006 controls there. Article 4 Directions in conservation areas (Enfield Council)
- £40 / £60 / £120 per m²
- Enfield residential CIL rates by area under the schedule adopted on 1 April 2016. CIL charging schedule, adopted 1 April 2016 (Enfield Council)
- £72.73 per m²
- The Mayor of London’s CIL in Enfield (band 2) 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)
- 100 m²
- Floor space below which an extension is exempt from CIL. Community Infrastructure Levy Regulations 2010, regulation 42 (legislation.gov.uk)
Enfield rear extension questions
How long does Enfield take to validate an application?
Its own requirements aim for 5 working days when the right documents are provided. Missing items lead to an email, and 21 days to supply them.
Is my Enfield street covered by an Article 4 direction?
Several conservation areas are, under directions from 2006, 2008, 2009 and 2017. We check your address against the council’s maps before we fix the route.
Will a small tree in the garden mean a tree survey?
Enfield counts trees with a trunk of 75 mm or more at 1.5 m height, within 15 m of the building, where they are protected or in a conservation area. We tell you after the survey.
Do I pay Enfield CIL on an extension?
Not if it adds under 100 square metres, which is the case for almost every rear extension.
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
Start your Enfield extension
Send the address and a few photos of the garden. We check the directions and trees and reply with a fixed fee.