17 Gypsy Lane Great Amwell Hertfordshire SG12 9RL Data via plota.co.uk

3/26/1270/HH - Householder Awaiting decision
Extensions & alterations

Proposal

Construction of first floor side extension, and part two-storey, part first-floor side extension with installation of dormers on both sides, replacement of conservatory roof including rooflights, alterations to fenestration; and partial conversion of detached garage with single storey side extension to create ancillary annexe Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
9 Sept 2026
Decision
Expected by 4 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 3 Nov 2026, from East Hertfordshire's recent extensions.

The consultation period closed on 22 Oct 2026.

Documents 8

Statements & assessments 1

PDF BIODIVERSITY QUESTIONNAIRE Supporting Documents · 9 Sept 2026 View ↗

Plans & drawings 5

PDF LOCATION PLAN Location/Block/Site Plan · 9 Sept 2026 View ↗ PDF PROPOSED SITE PLAN AND ANNEXE PLANS & ELEVATIONS Floorplan/Elevation drawing · 9 Sept 2026 View ↗ PDF EXISTING PLANS & ELEVATIONS Floorplan/Elevation drawing · 9 Sept 2026 View ↗ PDF PROPOSED PLANS & ELEVATIONS Floorplan/Elevation drawing · 9 Sept 2026 View ↗ PDF EXISTING SITE PLANS & GARAGE PLANS & ELEVATIONS Floorplan/Elevation drawing · 9 Sept 2026 View ↗

Application forms 1

PDF APPLICATION FORM - WITHOUT PERSONAL DATA Application Form · 9 Sept 2026 View ↗

Consultation & comments 1

PDF HIGHWAYS - 24/9/26 Consultee Correspondence · 24 Sept 2026 View ↗

All documents on the council site ↗

Site constraints 4

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 ↗
Also on the record
Radon affected area, class 2; Inside the Great Amwell built-up area; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 2, 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 listed building at the site · 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.

Sales history 2

Last sold for £897,500 in May 2026. Detached house, freehold.

13 May 2026£897,500
1 September 2017£730,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area140 m² (1,507 sq ft)
Energy ratingD (59 out of 100), could reach C
PropertyDetached house, 4 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in April 2025, the latest held for this property. The building may have changed since. View the certificate

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Other new applications on this street

17 Jun 2026Refused

1 Gypsy Lane Great Amwell Hertfordshire SG12 9RL

Erection of two-storey rear extension, single storey side extensions and detache...

3/26/0756/CLPO
31 Jul 2026Approved

Land R/O 18 And 20 Gypsy Lane Great Amwell Hertfordshire SG12 9RN

Variation of Condition 2 (Approved Plans), 15 (Parking/Turning), and 20 (Obscure...

3/26/1074/VAR

Nearby new applications

22 Oct 2026Pending

40 Pepper Hill Great Amwell Hertfordshire SG12 9RZ

Certificate of lawfulness for the erection of a single storey rear extension and...

3/26/1509/CLPO
31 Jul 2026Approved

Land R/O 18 And 20 Gypsy Lane Great Amwell Hertfordshire SG12 9RN

Variation of Condition 2 (Approved Plans), 15 (Parking/Turning), and 20 (Obscure...

3/26/1074/VAR

Important details

Council
East Hertfordshire
Application type
Householder
Postcode
SG12 9RL
Received
9 Sept 2026
Validated
9 Sept 2026
Ward
Great Amwell & Stansteads
Parish
Great Amwell Parish Council
Target decision
4 Nov 2026
Applicant
Show
Agent
Bridletree

Decision outlook

Day 50 of the 56-day target. East Hertfordshire usually decides extensions by day 55.

Day 506 days to the 56-day target
71%decided within 8 weeks
84%approved
672decided in the last year

Plota live figures for extensions decided by East Hertfordshire in the last twelve months, from validation. East Hertfordshire decision record →

Public comments

No public comments yet.

11 neighbours consulted · Last counted 28 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15211104
Planning Portal ref
PP-15211104
Comments by
22 Oct 2026
Statutory expiry
4 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

2025 Refused
1 Gypsy Lane Great Amwell Hertfordshire SG12 9RL
Demolition of garage and outbuildings. Erection of two storey side and front extension, p…
3/25/1892/HH
2025 Refused
1 Gypsy Lane Great Amwell Hertfordshire SG12 9RL
Demolition of garage and outbuildings. Erection of two storey side and front extension, p…
3/25/1892/HH
2024 Approved
Land R/O 18 And 20 Gypsy Lane Great Amwell Hertfordshire SG12 9RN
Erection of detached 3 bedroom dwelling with air source heat pump
3/24/0969/FUL
2023 Refused
18 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Erection of two-storey front extension, first floor side extension and two-storey rear ex…
3/23/1544/HH
2023 Refused
18 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Erection of two-storey front extension, first floor side extension and two-storey rear ex…
3/23/1544/HH
2022 Approved
Rear Of 18-20 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Erection of 1, 3 bedroomed dwelling to include basement, landscaping and access
3/22/2204/FUL
2022 Approved
Rear Of 18-20 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Erection of 1, 3 bedroomed dwelling to include basement, landscaping and access
3/22/2204/FUL
2021 Approved
25 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Increased roof height to create first floor accommodation with 3 rear dormers and 2 front…
3/21/1784/HH
2021 Approved
25 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Increased roof height to create first floor accommodation with 3 rear dormers and 2 front…
3/21/1784/HH
2020 Approved
25 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Increased roof height to create first floor accommodation with 3 rear dormers and 2 front…
3/20/2461/HH
2020 Approved
25 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Increased roof height to create first floor accommodation with 3 rear dormers and 2 front…
3/20/2461/HH
2020 Approved
10A Gypsy Lane Great Amwell Hertfordshire SG12 9RN
Erection of ground floor side extension to create conservatory.
3/20/0575/HH
2020 Approved
10A Gypsy Lane Great Amwell Hertfordshire SG12 9RN
Erection of ground floor side extension to create conservatory.
3/20/0575/HH
2019 Approved
10A Gypsy Lane Great Amwell Hertfordshire SG12 9RN
Construction of projecting first floor rear glazed balcony.
3/19/1566/HH
2018 Approved
23 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Proposed side, rear and front extensions with raised roof height to incorporate a roof co…
3/18/0207/HH
2017 Approved
Land To Rear Of 19 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Demolish existing annexe and construct new detached dwelling with basement (retrospective…
3/17/2074/FUL
2017 Approved
19 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Conversion of existing double garage to residential annexe
3/17/1487/HH
2017 Approved
Land Rear Of 8 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Outline application for the erection of 1 No. dwelling, with all matters reserved except…
3/17/1735/OUT
2017 Approved
23 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Proposed side, rear and front extensions with raised roof height to incorporate a roof co…
3/17/1185/HH
2017 Refused
Land Rear Of 12 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Erection of detached three bedroom dwelling (amendment to previous planning approval 3/16…
3/17/0604/FUL
2016 Approved
23 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Proposed side, rear and front extensions with raised roof height to incorporate a roof co…
3/16/1242/HH
2016 Approved
Rear Of 10 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Erection of three bedroom detached dwelling with associated off-street parking and new dr…
3/16/0857/FUL
2016 Approved
Rear Of 10 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RN
Erection of three bedroom detached dwelling with associated off-street parking and new dr…
3/16/0857/FUL
2016 Approved
19 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Erect new dwelling with basement.
3/16/0542/FUL
2016 Approved
19 Gypsy Lane Great Amwell Ware Hertfordshire SG12 9RL
Erect new dwelling with basement.
3/16/0542/FUL
East Hertfordshire
Planning Authority Score
4.9/10
Below average
#152 of 296 councils
Relevant to this application:
Householder decisions

East Hertfordshire is faster than most councils at deciding householder applications, ranking #93 out of 296. East Hertfordshire is also one of the strictest councils - it refuses more householder applications than almost any other, with only 84% approved vs 90% nationally.

One of the strictest councils
only 84% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
East Hertfordshire decision statistics
Based on MHCLG data, the year to March 2026
81%
Overall approval rate
Below avg (87%) #256 of 296
84%
Householder approved
Below avg (90%) #256 of 296
73%
Decided in 8 weeks
Above avg (63%) #93 of 296
36%
Extended time limit
Below avg (41%) #109 of 296
53%
Minor dwellings approved
128 decided (1-9 homes)
82%
Major dwellings approved
11 decided (10+ homes)
94%
Change of use approved
36 decided
1,184
Total decisions
223 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

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.