The Old Mill House Mill Lane Adderbury OX17 3LW Data via plota.co.uk

26/01935/F - Full Development Approved

Proposal

Alterations and extensions comprise the following: new entrance porch extension to east elevation and adjacent/associated landscape alteration works. New open porch extension to north elevation. New replacement external staircase serving habitable room above detached garage. Window enlargement to south elevation of garage building. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
21 Jul 2026
✓
Approved
9 Oct 2026

Approved on 9 Oct 2026 · Delegated · Last checked 10 Oct 2026

Site constraints 7

23 listed buildings within 150 m of the postcode pin
Nearest: Southern Pair of Gatepiers Approximately 25 Metres South of the Manor House, Grade II, about 18 m from the postcode pin · 1 Grade I, 1 Grade II*, 21 Grade II
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.
Show all 23 with distances
Historic England ↗
Adderbury 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 ↗
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Radon affected area, class 6
An estimated 30% or more of homes reach the radon action level. Indicative for the 1 km square, which takes the highest class found in it; a radon test gives the answer for a building.
From the British Geological Survey and UK Health Security Agency indicative atlas. Under building regulations, as the BRE guide BR 211 (2023) sets out, new buildings and extensions need basic radon protection from class 3 in England and Wales and from class 2 in Scotland, and full protection from class 5. The class at the site itself, from the detailed BGS map, decides which.
UKHSA radon ↗
Also on the record
Inside the Adderbury and Twyford built-up area; Priority habitat about 17 m away: No main habitat but additional habitats present; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 4, but it predates the buildings here and the current map does not class it as farmland.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. 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 1

Last sold for £1,000,000 in January 2002. Detached house, freehold.

23 January 2002£1,000,000

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

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Important details

Council
Cherwell
Application type
Full Development
Postcode
OX17 3LW
Received
21 Jul 2026
Validated
21 Jul 2026
Ward
Adderbury, Bloxham And Bodicote
Parish
Adderbury
Case officer
Show
Target decision
15 Sept 2026
Decision
Permitted
Decision date
9 Oct 2026
Decision level
Delegated
Applicant
Show

How this decision compares

Decided in 80 days from validation, 24 days slower than Cherwell's median of 56 for extensions. Approved, as 92% of extensions here are.

57%decided within 8 weeks
92%approved
467decided in the last year

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

Consultation & key dates

Comments by
19 Sept 2026
Cherwell
Planning Authority Score
3.6/10
Below average
#214 of 296 councils
Relevant to this application:
Householder decisions

Cherwell is slower than most councils at deciding householder applications, ranking #247 out of 296. 49% 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
Cherwell decision statistics
Based on MHCLG data, the year to March 2026
92%
Overall approval rate
Above avg (87%) #77 of 296
94%
Householder approved
Above avg (90%) #101 of 296
47%
Decided in 8 weeks
Below avg (63%) #247 of 296
49%
Extended time limit
Above avg (41%) #218 of 296
77%
Minor dwellings approved
117 decided (1-9 homes)
95%
Major dwellings approved
19 decided (10+ homes)
96%
Change of use approved
47 decided
1,091
Total decisions
90 refused in the year to March 2026

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