18 Mount Keen Great Ashby Stevenage Hertfordshire SG1 6BP Data via plota.co.uk
Proposal
Replacement of the existing rear patio, levelling rear garden beyond patio area with associated retaining walls and steps, erection of a timber gazebo, associated landscaping works, together with proposed alterations to boundary fencing (development already commenced). Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision around 2 Dec 2026, from North Hertfordshire's recent extensions.
Site constraints 5
Checked on 27 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 4
Last sold for £525,000 in August 2018. Detached house, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in March 2014, the latest held for this property. The building may have changed since. View the certificate
Every application in North Hertfordshire - and every UK council - as a live feed, an API, or a bulk CSV export.
Important details
- Council
- North Hertfordshire
- Application type
- Full Permission Householder
- Postcode
- SG1 6BP
- Received
- 14 Oct 2026
- Validated
- 14 Oct 2026
- Ward
- Great Ashby Ward
- Parish
- Great Ashby Community Council
- Case officer
- Show
- Target decision
- 9 Dec 2026
- Applicant
- Show
- Agent
- Show
Decision outlook
Day 15 of the 56-day target. North Hertfordshire usually decides extensions by day 49.
Plota live figures for extensions decided by North Hertfordshire in the last twelve months, from validation. North Hertfordshire decision record →
Public comments
No public comments yet.
2 neighbours consulted · Last counted 27 Oct 2026
Consultation & key dates
- Alt. reference
- PP-15295172
- Planning Portal ref
- PP-15295172
- Comments by
- 26 Nov 2026
Historical activity at this location
19 nearby applications on record - archival context, not part of the live application.
Nearby activity
North Hertfordshire ranks #128 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (95%) than the national average (90%).
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.
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18 Mount Keen Great Ashby Stevenage Hertfordshire SG1 6BP
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Comments are open until 26 Nov 2026