Liitle Marlow Sewage Treatment Works Marlow Road Little Marlow Marlow SL7 3SB Data via plota.co.uk

26/30015/SMI - Spheres of Mutual Interest Awaiting decision
Commercial & major worksDemolition

Proposal

Demolition of existing life expired single storey modular building and garage and development of two new single storey modular training facility buildings. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
23 Sept 2026
Decision
Expected by 20 Oct 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 14 Nov 2026 and 2 Dec 2026, from Windsor and Maidenhead's recent commercial and major works.

Documents 3

Consultation & comments 2

PDF Neighbour notification list Neighbour Notification List · 28 Sept 2026 View ↗ PDF Consultation Correspondence - General · 24 Sept 2026 View ↗

Other documents 1

PDF History log Property History · 25 Sept 2026 View ↗

All documents on the council site ↗

Site constraints 5

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 ↗
Flood zone 2, rivers and sea
Medium chance: between a 1 in 100 and 1 in 1,000 annual chance from rivers, or 1 in 200 to 1 in 1,000 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Article 4 direction
Former Wycombe Rural District - Poultry Production. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Agricultural land, grade 2
Best and most versatile land (grades 1, 2 and 3a). Source: the Predictive Agricultural Land Classification Map (Defra and Natural England, 2025; the Welsh Government's Predictive ALC Map 2 in Wales), a model rather than a site survey. Natural England's Provisional ALC map (1:250,000, 1970s), which most planning maps still show, had this area as grade 4. The predicted grade is Defra's current estimate; only a site survey settles it.
Where development of farmland is needed, policy prefers poorer land over the best and most versatile (grades 1, 2 and 3a). Three sources: Natural England's post-1988 field surveys, which are definitive where they exist; the Defra predictive map for England (2025) and the Welsh Government predictive map, modelled from the soil map with 3a and 3b split; and the 1970s provisional map, which planners and other services still show, coarser and with grade 3 undivided. Where the provisional and predicted grades disagree, treat the predicted grade as the current estimate and expect an application to carry its own survey.
Also on the record
Radon affected area, class 2.
Not affected
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

9 Sept 2026Pending

Bisham Abbey Bisham Village Marlow Road Bisham Marlow SL7 1RR

Consent for works associated to the replacement of the boiler, upgrades to the p...

26/02224/LBC
21 Aug 2026Approved

Stable Block Bisham Village Bisham Abbey Marlow Road Bisham Marlow SL7 1RR

Details required by Condition 6 (Precautionary Working Method Statement - partia...

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Nearby new applications

23 Sept 2026Pending

Little Marlow Sewage Treatment Works, Muschalik Road Off A4155, Little Marlow, Marlow, Buckinghamshire, SL7 3SB

Demolition of existing life expired single storey modular building and garage an...

SMI/2026/28
10 Sept 2026Pending

Little Marlow Sewage Treatment Works Muschalik Road Off A4155 Little Marlow Marlow Buckinghamshire SL7 3SB

Demolition of existing life expired single storey modular building and garage an...

PL/26/07322/FA

Important details

Council
Windsor and Maidenhead
Application type
Spheres of Mutual Interest
Postcode
SL7 3SB
Received
23 Sept 2026
Validated
23 Sept 2026
Case officer
Show
Target decision
20 Oct 2026
Applicant
Show

Decision outlook

Day 16 of the 56-day target. Windsor and Maidenhead usually decides commercial and major works by day 55.

Day 1640 days to the 56-day target
56%decided within 8 weeks
81%approved
36decided in the last year

Plota live figures for commercial and major works decided by Windsor and Maidenhead in the last twelve months, from validation. Windsor and Maidenhead decision record →

Consultation & key dates

Statutory expiry
20 Oct 2026
Env. assessment
No

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
Spade Oak Quarry Marlow Road Little Marlow Buckinghamshire SL7 3SB
Variation of conditions 1 (Time Limit), 2 (Plans) and 19 (Operations) of planning permiss…
CM/0010/25
2025
Spade Oak Quarry Marlow Road Little Marlow Buckinghamshire SL7 3SB
Creation of car park, footpaths and other Suitable Alternative Natural Greenspace (SANG)…
CM/0011/25
2017 Approved
Little Marlow Sewage Treatment Works Marlow Road Little Marlow Buckinghamshire SL7 3SB
Application to discharge Condition 7 of Planning Permission CM/24/16 by submission of odo…
AOC/0030/17
2016 Approved
Little Marlow Sewage Treatment Works Marlow Road Little Marlow Buckinghamshire SL7 3SB
Retention of existing composting building by Variation of Conditions 4, 5, 9 and 10 attac…
CM/24/16
2016 Approved
Little Marlow Sewage Treatment Works Marlow Road Little Marlow Buckinghamshire SL7 3SB
Screening Opinion of the proposed retention of the existing composting building at Little…
CX/05/16
Windsor and Maidenhead
Planning Authority Score
5.3/10
Average
#135 of 296 councils
Relevant to this application:
Householder decisions

Windsor and Maidenhead is faster than most councils at deciding householder applications, ranking #82 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Windsor and Maidenhead is also one of the strictest councils - it refuses more householder applications than almost any other, with only 74% approved vs 90% nationally.

One of the strictest councils
only 74% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Windsor and Maidenhead decision statistics
Based on MHCLG data, the year to March 2026
72%
Overall approval rate
Below avg (87%) #293 of 296
74%
Householder approved
Below avg (90%) #294 of 296
75%
Decided in 8 weeks
Above avg (63%) #82 of 296
28%
Extended time limit
Below avg (41%) #47 of 296
44%
Minor dwellings approved
156 decided (1-9 homes)
96%
Major dwellings approved
27 decided (10+ homes)
64%
Change of use approved
25 decided
1,530
Total decisions
434 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings