Cedar House 73 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PA Data via plota.co.uk

26/1302/DOC - Discharge of Condition Awaiting decision
Admin / procedural

Proposal

Application for approval of details reserved by condition 3 (fenestration) of planning permission reference . Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
8 Sept 2026
✓
Consultation
23 Sept 2026
Decision
Expected by 3 Nov 2026

Under consideration

No decision has been issued yet. A decision is expected by 3 Nov 2026.

The consultation period closed on 14 Oct 2026.

Documents 3

Plans & drawings 1

PDF Det002 Window / door details Drawing/Plans · 8 Sept 2026 View ↗

Application forms 1

PDF Applicationformredacted Application Form · 8 Sept 2026 View ↗

Other documents 1

PDF Sunseeker doors, d2,d3,d4 Supporting Documents · 8 Sept 2026 View ↗

All documents on the council site ↗

Associated applications 2

  • Part of

    AmendmentApprovedcouncil archive

    Conditions 3 awaiting decision

    • ConditionsApplication for approval of details reserved by condition 3 (fenestration).This application26/1302/DOC

Site constraints 7

Grade II listed: Cedar House
List entry 1174600 · 4 m away · 2 more listed buildings within 150 m (2 Grade II)
Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show the other 2 with distances
Historic England ↗
Green belt: London
Inappropriate development needs very special circumstances.
Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.
Read the government guidance ↗
South Mimms conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
Also on the record
Radon affected area, class 3; Inside the South Mimms built-up area; Priority habitat 29 m away: Deciduous woodland; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 3, but it predates the buildings here and the current map does not class it as farmland.
Not affected
Outside flood zones 2 and 3 · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Building

Floor area575 m² (6,189 sq ft)
Energy ratingE (43 out of 100), could reach C
PropertyDetached house, 20 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in June 2020, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Hertsmere
Application type
Discharge of Condition
Postcode
EN6 3PA
Received
8 Sept 2026
Validated
8 Sept 2026
Ward
Shenley
Parish
The Parish Council South Mimms And Ridge
Case officer
Show
Target decision
3 Nov 2026
Applicant
Show
Agent
PBARC LTD

Public comments

No public comments yet.

Last counted 28 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15210810
Planning Portal ref
PP-15210810
Consultation
23 Sept 2026
Comments by
14 Oct 2026
Statutory expiry
3 Nov 2026
Env. assessment
No

Historical activity at this location

40 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2023 Approved
Insertion of 2 x roof lights to approved side extension following consented schemes 23/09…
23/1499/LBC
2023 Approved
Insertion of 2 x roof lights to approved side extension following consented schemes 23/09…
23/1498/HSE
2023 Approved
Insertion of 2 x roof lights to approved side extension following consented schemes 23/09…
23/1499/LBC
2023 Approved
Insertion of 2 x roof lights to approved side extension following consented schemes 23/09…
23/1498/HSE
2023 Approved
Application for approval of details reserved by conditions 4 (external materials) and 7 (…
23/1312/DOC
2023 Approved
Application for approval of details reserved by conditions 4 (external materials) and 7 (…
23/1312/DOC
2023 Approved
Amendments to approved side extension (under application reference 22/1631/LBC). Minor in…
23/0921/LBC
2023 Approved
Amendments to approved side extension (under application reference 22/1630/HSE). Minor in…
23/0920/HSE
2023 Approved
Amendments to approved side extension (under application reference 22/1631/LBC). Minor in…
23/0921/LBC
2023 Approved
Amendments to approved side extension (under application reference 22/1630/HSE). Minor in…
23/0920/HSE
2023 Withdrawn
Application for a non-material amendment to allow for alteration from curved edge (to sid…
23/0801/MA
2023 Withdrawn
Application for a non-material amendment to allow for alteration from curved edge (to sid…
23/0801/MA
2023 Approved
2no. ASH. Reduce by approximately 4m in height and 3m in width.
23/0183/TRC
2023 Approved
2no. ASH. Reduce by approximately 4m in height and 3m in width.
23/0183/TRC
2022 Approved
Single storey side extension with green roof, alterations to fenestration at all elevatio…
22/1631/LBC
2022 Approved
Single storey side extension with green roof, alterations to fenestration at all elevatio…
22/1630/HSE
2022 Approved
Single storey side extension with green roof, alterations to fenestration at all elevatio…
22/1631/LBC
2022 Approved
Single storey side extension with green roof, alterations to fenestration at all elevatio…
22/1630/HSE
2022 Withdrawn
Single storey side extension to include green roof, alterations to fenestration, solar pa…
22/0735/LBC
2022 Withdrawn
Single storey side extension to include green roof, alterations to fenestration, solar pa…
22/0734/HSE
2022 Withdrawn
Single storey side extension to include green roof, alterations to fenestration, solar pa…
22/0735/LBC
2022 Withdrawn
Single storey side extension to include green roof, alterations to fenestration, solar pa…
22/0734/HSE
Within ~100m

Nearby activity

2023 Approved
5 Earls Corner Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PF
Conversion of loft to habitable space to include insertion of two rear dormers and associ…
23/0194/HSE
2023 Approved
5 Earls Corner Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PF
Conversion of loft to habitable space to include insertion of two rear dormers and associ…
23/0194/HSE
2022
5 Earls Corner Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PF
Conversion of loft to form habitable space including rear dormer. Certificate of Lawful D…
22/1350/CLP
2022
5 Earls Corner Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PF
Conversion of loft to form habitable space including rear dormer. Certificate of Lawful D…
22/1350/CLP
2021 Approved
8 Hamilton Close South Mimms Potters Bar Hertfordshire EN6 3PG
Internal and external alterations to include new windows and doors to facilitate the conv…
21/1705/FUL
2021 Approved
71 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PA
T1 WEEPING WILLOW. To reduce by 2.5m in height and width. T2 WEEPING WILLOW. To reduce re…
21/1424/TRC
2021 Approved
71 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PA
T1 WEEPING WILLOW. To reduce by 2.5m in height and width. T2 WEEPING WILLOW. To reduce re…
21/1424/TRC
2020 Approved
Cedar House 73 Blanche Lane South Mimms Hertfordshire EN6 3PA
T3 CEDAR. To reduce 2 low lateral limbs by 2.5m from 16m to 13.5m. Lift to 2.4m above gro…
20/2031/TPO
2020 Approved
Cedar House 73 Blanche Lane South Mimms Hertfordshire EN6 3PA
T3 CEDAR. To reduce 2 low lateral limbs by 2.5m from 16m to 13.5m. Lift to 2.4m above gro…
20/2031/TPO
2020 Refused
Cedar House 73 Blanche Lane South Mimms Hertfordshire EN6 3PA
T3 CEDAR. Reduce 2 low lateral limbs by up to 4m from 16m to 12m in radius. Lift lower br…
20/1737/TPO
2020 Approved
Cedar House 73 Blanche Lane South Mimms Hertfordshire EN6 3PA
T1: 1 x Silver Birch - Reduce by 4m height & 1.5m width (reduce height from 15m to 13m &…
20/1512/TRC
2020 Approved
Cedar House 73 Blanche Lane South Mimms Hertfordshire EN6 3PA
T1: 1 x Silver Birch - Reduce by 4m height & 1.5m width (reduce height from 15m to 13m &…
20/1512/TRC
2019 Approved
5 Earls Corner Blanche Lane South Mimms Hertfordshire EN6 3PF
Dropped kerb for vehicular access.
19/0082/HSE
2018 Refused
8 Hamilton Close South Mimms Hertfordshire EN6 3PG
Construction of new roof following removal of existing to facilitate conversion of former…
18/2097/FUL
2017 Refused
8 Hamilton Close South Mimms Hertfordshire EN6 3PG
Internal and external alterations to include new windows and doors to facilitate the conv…
17/1110/FUL
2017 Approved
10 Blanche Lane South Mimms Hertfordshire EN6 3PA
T1 - Willow tree to be removed .
17/0918/TRC
2016 Approved
6 Earls Corner Blanche Lane South Mimms Hertfordshire EN6 3PF
Dropped kerb to allow access to paved hard standing.
16/1045/HSE
2016 Approved
6 Earls Corner Blanche Lane South Mimms Hertfordshire EN6 3PF
Dropped kerb to allow access to paved hard standing.
16/1045/HSE
Hertsmere
Planning Authority Score
3.3/10
Poor
#225 of 296 councils
Relevant to this application:
Householder decisions

Hertsmere is slower than most councils at deciding householder applications, ranking #243 out of 296. 55% of applications have the time limit extended, above the 41% national average. Householder applications are slightly more likely to be approved here (94%) than the national average (90%).

Slower than most councils
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Hertsmere decision statistics
Based on MHCLG data, the year to March 2026
93%
Overall approval rate
Above avg (87%) #57 of 296
94%
Householder approved
Above avg (90%) #108 of 296
49%
Decided in 8 weeks
Below avg (63%) #243 of 296
55%
Extended time limit
Above avg (41%) #249 of 296
84%
Minor dwellings approved
102 decided (1-9 homes)
75%
Major dwellings approved
8 decided (10+ homes)
89%
Change of use approved
27 decided
742
Total decisions
55 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.