Planning application · Enfield
26/00607/HOU.
40 Derwent Avenue London N18 1BW
Householder at 40 Derwent Avenue London N18 1BW, received 17 Feb 2026 — refused on 20 May 2026 (delegated, Jennie Rebairo).
ApprovedRefusedOther
At a glance · this applicationEnfield profile →
Refused
Outcome
20 May 2026
13 wks
Decision time
5 wks over the 8-week target
—
Conditions
not captured
18
Documents
18 linked
1
Objections
0 in support
No
Appeal
none recorded
Record from the Enfield planning register as captured; documents link to the council's own files. Nearby applications are context, not part of this application.
Application
What is it?
Single storey front/side/rear extension involving removal of existing rear conservatory, conversion of garage into habitable room, front entrance porch, hip to gable and rear dormer with Juliette balcony and rooflights.
Reference
26/00607/HOU
Type
Householder
Applicant
Agent / consultant
Case officer
Postcode
N18 1BW
Ward
Council
Received
17 Feb 2026
Validated
30 Mar 2026
Target date
25 May 2026
Decision date
20 May 2026
Decision route
Delegated (officer)
Status
Decided
Council register
Reference
26/00607/HOU
Type
Householder
Show all 16 rows
Applicant
Agent / consultant
Case officer
Postcode
N18 1BW
Ward
Council
Received
17 Feb 2026
Validated
30 Mar 2026
Target date
25 May 2026
Decision date
20 May 2026
Decision route
Delegated (officer)
Status
Decided
Council register
Documents
What was filed?
Document
Published
View
Show all 10 rows
Documents open on the Enfield portal (the portal needs its documents tab opened first — the link handles that). View the application page ↗
Decision
What happened?
Refused on 20 May 2026, delegated decision by Jennie Rebairo — 13 weeks from submission (5 over the 8-week target).
Timeline
Date
Event
17 Feb 2026
Application received
30 Mar 2026
Application validated
25 May 2026
Statutory target date
20 May 2026
Delegated decision: Refused · Jennie Rebairo
17 Feb 2026
Application received
30 Mar 2026
Application validated
25 May 2026
Statutory target date
Show all 4 rows
20 May 2026
Delegated decision: Refused · Jennie Rebairo
Why it was refused
Reason
As stated on the decision notice
1
Insufficient information in the form of a Flood Risk Assessment and Sustainable Drainage
Strategy has been provided to enable assessment of whether the proposed development would result
in an increase in flood risk on or off site and suitable flood control and mitigation measures have not
been demonstrated, this would be contrary to London Plan Policies SI 12 and SI 13, Policy CP28 of the
Core Strategy (2010) and Policies DMD59, DMD60, DMD61 and DMD62 of the Development
Management Document (2014) and National Planning Policy Framework (2024).
Dated: 20 May 2026
Authorised on behalf of:
Karen Page
Head of Planning and Building Control
Housing, Regeneration and Development Department
Enfield Council
PO Box 53, Civic Centre
Silver Street, Enfield
EN1 3XE
If you have any questions about this decision, please contact the planning officer
jennie.rebairo@enfield.gov.uk.
List of plans and documents referred to in this Notice:
Title/Number Version TYPE
Location Plan Drawing
Block Plan Drawing
ex PL1B Drawing
ex ELV4 Drawing
ex PL3 Drawing
ex ELV5 Drawing
pro PL7 Drawing
pro ELV8 Drawing
pro ELV9 Drawing
ex PL2 Drawing
pro PL6 Drawing
fld3 P11C Drawing
fld1 P11 Drawing
fld2 P11B Supporting Information
Article 12 Notice Supporting Information
SuDS 13 Drawing
Additional Information
APPEAL
Should you (an applicant or agent) feel aggrieved by the decision of the Council to either refuse
permission or to grant permission subject to conditions, you can
1
Insufficient information in the form of a Flood Risk Assessment and Sustainable Drainage
Strategy has been provided to enable assessment of whether the proposed development would result
in an increase in flood risk on or off site and suitable flood control and mitigation measures have not
been demonstrated, this would be contrary to London Plan Policies SI 12 and SI 13, Policy CP28 of the
Core Strategy (2010) and Policies DMD59, DMD60, DMD61 and DMD62 of the Development
Management Document (2014) and National Planning Policy Framework (2024).
Dated: 20 May 2026
Authorised on behalf of:
Karen Page
Head of Planning and Building Control
Housing, Regeneration and Development Department
Enfield Council
PO Box 53, Civic Centre
Silver Street, Enfield
EN1 3XE
If you have any questions about this decision, please contact the planning officer
jennie.rebairo@enfield.gov.uk.
List of plans and documents referred to in this Notice:
Title/Number Version TYPE
Location Plan Drawing
Block Plan Drawing
ex PL1B Drawing
ex ELV4 Drawing
ex PL3 Drawing
ex ELV5 Drawing
pro PL7 Drawing
pro ELV8 Drawing
pro ELV9 Drawing
ex PL2 Drawing
pro PL6 Drawing
fld3 P11C Drawing
fld1 P11 Drawing
fld2 P11B Supporting Information
Article 12 Notice Supporting Information
SuDS 13 Drawing
Additional Information
APPEAL
Should you (an applicant or agent) feel aggrieved by the decision of the Council to either refuse
permission or to grant permission subject to conditions, you can
Policies cited
CP28DMD59DMD60DMD61DMD62SI12SI13NPPF
Public response
Measure
Count
Objections
1
In support
0
Total comments
1
Objections
1
In support
0
Total comments
1
People
Who is involved?
Name
Role
Applicant — the party who applied, not necessarily the owner
Agent · consultant profile
Case officer — delegated decision
Applicant — the party who applied, not necessarily the owner
Agent · consultant profile
Case officer — delegated decision
Place
What affects it?
Context around the site — not part of this application. Designations over the site: use the map's designations filter (conservation areas, listed buildings, Article 4, flood risk …). Decisions within 250 metres of the site are listed below — context, not this application.
Other applications within 250 metres (context — nearby, not this application)
No other geocoded decision is recorded within 250 metres.