Land Rear Of 31 - 61 Blanche Lane South Mimms Hertfordshire Data via plota.co.uk

26/1048/OUT - Outline Application Awaiting decision
New homes

Proposal

Construction of up to 49 dwellings on Land off Blanche Lane. (Outline application to include access, all other matters reserved) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
28 Jul 2026
✓
Validated
6 Aug 2026
✓
Consultation
11 Aug 2026
Decision
Expected by 5 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision by 16 Oct 2026, from Hertsmere's recent new homes.

The consultation period closed on 17 Sept 2026.

Documents 36

Statements & assessments 17

PDF Flood risk assessment and drainage strategy report Supporting Documents · 6 Aug 2026 View ↗ PDF Bng metric Supporting Documents · 6 Aug 2026 View ↗ PDF Planning statement Supporting Documents · 3 Aug 2026 View ↗ PDF Design & access statement Supporting Documents · 3 Aug 2026 View ↗ PDF Transport statement Supporting Documents · 3 Aug 2026 View ↗ PDF Air quality assessment Supporting Documents · 3 Aug 2026 View ↗ PDF Arboricultural impact assessment Supporting Documents · 3 Aug 2026 View ↗ PDF Breeding bird survey report Supporting Documents · 3 Aug 2026 View ↗ PDF Built heritage statement Supporting Documents · 3 Aug 2026 View ↗ PDF Great crested newt district level licensing impact assessment & conservation pa Supporting Documents · 3 Aug 2026 View ↗ PDF Design & access statement Supporting Documents · 3 Aug 2026 View ↗ PDF Energy sustainability statement Supporting Documents · 3 Aug 2026 View ↗ PDF Great crested newt edna survey report Supporting Documents · 3 Aug 2026 View ↗ PDF Residential noise assessment Supporting Documents · 3 Aug 2026 View ↗ PDF Preliminary ecological appraisal Supporting Documents · 3 Aug 2026 View ↗ PDF Reptile survey report Supporting Documents · 3 Aug 2026 View ↗ PDF Biodiversity net gain assessment Supporting Documents · 3 Aug 2026 View ↗

Plans & drawings 14

PDF P001 Location plan Drawing/Plans · 3 Aug 2026 View ↗ PDF P002 Existing site plan Drawing/Plans · 3 Aug 2026 View ↗ PDF P010 Existing and proposed indicative elevations Drawing/Plans · 3 Aug 2026 View ↗ PDF P011 Proposed indicative site section Drawing/Plans · 3 Aug 2026 View ↗ PDF P020 Existing indicative entrance area Drawing/Plans · 3 Aug 2026 View ↗ PDF P021 Proposed indicative entrance area Drawing/Plans · 3 Aug 2026 View ↗ PDF Itl17556-ga-001 Access option from blanche lane Drawing/Plans · 3 Aug 2026 View ↗ PDF Itl17556-ga-005 Site access swept path analysis - refuse vehicle Drawing/Plans · 3 Aug 2026 View ↗ PDF Itl17556-ga-006 Site access swept path analysis - pumping appliance Drawing/Plans · 3 Aug 2026 View ↗ PDF Itl17556-ga-007 Site access swept path analysis - 7.5t rigid vehicle Drawing/Plans · 3 Aug 2026 View ↗ PDF Itl17556-ga-008 Site access swept path analysis - estate car Drawing/Plans · 3 Aug 2026 View ↗ PDF 250835-tma-xx-dr-l-3100 Landscape overview plan Drawing/Plans · 3 Aug 2026 View ↗ PDF G001 Indicative coloured site plan Drawing/Plans · 3 Aug 2026 View ↗ PDF P003 Proposed indicative site plan Drawing/Plans · 3 Aug 2026 View ↗

Application forms 1

PDF Applicationformredacted Application Form · 3 Aug 2026 View ↗

Other documents 4

PDF Phase 1: desk top study report (pages 51-145) Supporting Documents · 3 Aug 2026 View ↗ PDF Phase 1: desk top study report (pages 26-50) Supporting Documents · 3 Aug 2026 View ↗ PDF Phase 1: desk top study report (pages 1-25) Supporting Documents · 3 Aug 2026 View ↗ PDF Landscape strategy Supporting Documents · 3 Aug 2026 View ↗

All documents on the council site ↗

Site constraints 7

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 ↗
1 listed building within 150 m
Nearest: Mymsmead, Grade II, 52 m away
The site itself is not listed. 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.
Historic England ↗
Also on the record
Radon affected area, class 3; Inside the South Mimms built-up area; Priority habitat 25 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.

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Other new applications on this street

16 Sept 2026Approved

83 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PE

1x Weeping Birch to reduce by approximately 1m to leave a final height of 4m and...

26/1249/TRC
8 Sept 2026Pending

Cedar House 73 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PA

Application for approval of details reserved by condition 3 (fenestration) of pl...

26/1302/DOC
8 Jul 2026Pending

62 - 64 Blanche Lane South Mimms Hertfordshire

Installation of solar panels on the roof. (Application for Listed Building Conse...

26/0935/LBC
28 May 2026Approved

The Old Vicarage 97 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PE

T1 MAPLE. Reduce back to its previous reduction points. Remove approx the top 3 ...

26/0731/TRC

Nearby new applications

12 Aug 2026Pending

8 Hamilton Close South Mimms Potters Bar Hertfordshire EN6 3PG

Conversion of existing office to 4 residential units facilitated by internal and...

26/1159/FUL
16 Sept 2026Approved

83 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PE

1x Weeping Birch to reduce by approximately 1m to leave a final height of 4m and...

26/1249/TRC
8 Sept 2026Pending

Cedar House 73 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3PA

Application for approval of details reserved by condition 3 (fenestration) of pl...

26/1302/DOC
17 Jul 2026Pending

W Block Clare Hall Laboratories Blanche Lane South Mimms Hertfordshire

Outline application (with all matters reserved except for means of access) for t...

26/0988/OUT
8 Jul 2026Pending

62 - 64 Blanche Lane South Mimms Hertfordshire

Installation of solar panels on the roof. (Application for Listed Building Conse...

26/0935/LBC
8 Jul 2026Pending

62 - 64 Blanche Lane South Mimms Hertfordshire

Installation of solar panels on the roof. (Associated Listed Building Consent 26...

26/0934/FUL

Important details

Council
Hertsmere
Application type
Outline Application
Postcode
EN6 3NZ
Received
28 Jul 2026
Validated
6 Aug 2026
Ward
Shenley
Parish
The Parish Council South Mimms And Ridge
Case officer
Show
Target decision
5 Nov 2026
Applicant
Show
Agent
James Holmes Planning Ltd

Decision outlook

Day 64, past Hertsmere's usual 59 days for new homes. 74% are decided within thirteen weeks, so most likely by 5 Nov 2026.

Day 6427 days to the 91-day target
40%decided within 8 weeks
69%approved
40decided in the last year

Plota live figures for new homes decided by Hertsmere in the last twelve months, from validation. Hertsmere decision record →

Public comments

47comments received
19 objecting7 neutral21 supporting

45% support · above the UK average of 16%

82 neighbours consulted · Last counted 7 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15106376
Planning Portal ref
PP-15106376
Neighbours
11 Aug 2026
Consultation
11 Aug 2026
Comments by
17 Sept 2026
Site or press notice
27 Aug 2026
Statutory expiry
5 Nov 2026
Env. assessment
No

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

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 Approved
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Single storey rear extension connected to main dwelling via glass link, changes to fenest…
22/0532/LBC
2022 Approved
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Single storey rear extension connected to main dwelling via glass link, changes to fenest…
22/0531/HSE
2022 Approved
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Single storey rear extension connected to main dwelling via glass link, changes to fenest…
22/0532/LBC
2022 Approved
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Single storey rear extension connected to main dwelling via glass link, changes to fenest…
22/0531/HSE
2021 Withdrawn
Land Adjoining 49 Blanche Lane South Mimms Hertfordshire
Demolition of garage and construction of 2 storey detached, 4 bed dwelling on land adjace…
21/2453/FUL
2021 Withdrawn
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Repair and minor refurbishment of the property, construction of a single storey side and…
21/2048/LBC
2021 Withdrawn
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Repair and minor refurbishment of the property, construction of a single storey side and…
21/2047/HSE
2021 Withdrawn
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Repair and minor refurbishment of the property, construction of a single storey side and…
21/2048/LBC
2021 Withdrawn
Mymsmead 49 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NZ
Repair and minor refurbishment of the property, construction of a single storey side and…
21/2047/HSE
2021 Approved
Land Adjoining 49 Blanche Lane South Mimms Hertfordshire
Construction of a 2 storey detached, 3 bed dwelling on land adjacent to No 49 Blanche Lan…
21/0429/FUL
2021 Approved
Land Adjoining 49 Blanche Lane South Mimms Hertfordshire
Construction of a 2 storey detached, 3 bed dwelling on land adjacent to No 49 Blanche Lan…
21/0429/FUL
2020 Withdrawn
Land Adjoining 49 Blanche Lane South Mimms Hertfordshire
Construction of a 2 storey detached, 3 bed dwelling on land adjacent to No 49 Blanche Lan…
20/2129/FUL
2020 Withdrawn
Land Adjoining 49 Blanche Lane South Mimms Hertfordshire
Construction of a 2 storey detached, 3 bed dwelling on land adjacent to No 49 Blanche Lan…
20/2129/FUL
2020 Withdrawn
Land Adjoining 49 Blanche Lane South Mimms Hertfordshire
Construction of a 2 storey detached, 3 bed dwelling on land adjacent to No 49 Blanche Lan…
20/0723/FUL
2020 Withdrawn
Land Adjoining 49 Blanche Lane South Mimms Hertfordshire
Construction of a 2 storey detached, 3 bed dwelling on land adjacent to No 49 Blanche Lan…
20/0723/FUL
2020 Approved
31 Blanche Lane South Mimms Hertfordshire EN6 3NZ
Unidentified species. T1. Crown reduce from 25ft to 20ft. T2. Crown reduce from 18ft to 1…
20/0571/TRC
2020 Approved
31 Blanche Lane South Mimms Hertfordshire EN6 3NZ
Unidentified species. T1. Crown reduce from 25ft to 20ft. T2. Crown reduce from 18ft to 1…
20/0571/TRC
2019 Approved
31 Blanche Lane South Mimms Hertfordshire EN6 3NZ
T1 CHERRY. Fell. T3 WILLOW. Fell.
19/1569/TRC
2016 Approved
2 Blanche Lane South Mimms Hertfordshire EN6 3NZ
Creation of additional vehicular crossover to access driveway.
16/0670/FUL
2016 Approved
2 Blanche Lane South Mimms Hertfordshire EN6 3NZ
2no. FIR TREES. Fell. 1no. ASH. Fell.
16/1081/TRC
2016 Approved
2 Blanche Lane South Mimms Hertfordshire EN6 3NZ
2no. FIR TREES. Fell. 1no. ASH. Fell.
16/1081/TRC
2016 Withdrawn
2 Blanche Lane South Mimms Hertfordshire EN6 3NZ
Erection of detached single storey outbuilding to contain garage and workshop.
16/0275/CLP
2016 Withdrawn
2 Blanche Lane South Mimms Hertfordshire EN6 3NZ
Erection of detached single storey outbuilding to contain garage and workshop.
16/0275/CLP
Hertsmere
Planning Authority Score
3.3/10
Poor
#225 of 296 councils
Relevant to this application:
Major dwellings

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