HS2 Construction Site West Of A412 Denham Way Chalfont Lane West Hyde Hertfordshire Data via plota.co.uk

26/1584/HS2 - HS2 schedule 17 application Pending Consideration

Proposal

Application for non-material change under Paragraph 21 of Schedule 17 to the High Speed Rail (London-West Midlands) Act 2017. Amendment to Schedule 17 Approval Ref to amend hand rail design to Tilehouse Lane overbridge wingwalls Data via plota.co.uk

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View original council record ↗Last checked 7 Oct 2026, 05:21

Application progress

✓

Received

1 Oct 2026

Decision

Expected by 26 Nov 2026

Under consideration

No decision has been issued yet. A decision is expected by 26 Nov 2026.

Documents 1

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 ↗

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 3. 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; National infrastructure project about 1493 m away: Expansion of Heathrow Airport (Third Runway), at pre-application.

Not affected

Outside flood zones 2 and 3 · 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 Planning Inspectorate, 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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Important details

Council: Three Rivers
Application type: HS2 schedule 17 application
Received: 1 Oct 2026
Validated: 1 Oct 2026
Ward: Chorleywood South And Maple Cross
Parish: Non-Parished
Case officer: Show
Target decision: 26 Nov 2026
Decision level: Delegated
Applicant: Show
Agent: Align JV

Public comments

No public comments yet.

Last counted 6 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference: ALJ-TP-2060a
Statutory expiry: 26 Nov 2026
Env. assessment: No

Three Rivers

Planning Authority Score

7.3/10

Good

#54 of 296 councils

Relevant to this application:

Householder decisions

Three Rivers is faster than most councils at deciding householder applications, ranking #30 out of 296. Only 24% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Householder applications are slightly more likely to be approved here (91%) than the national average (90%).

Faster than most councils

for householder decisions

These figures are council-wide context, not a prediction for this application. View full council performance

Three Rivers decision statistics

Based on MHCLG data, the year to March 2026

89%

Overall approval rate

Above avg (87%) #145 of 296

91%

Householder approved

Above avg (90%) #184 of 296

82%

Decided in 8 weeks

Above avg (63%) #30 of 296

24%

Extended time limit

Below avg (41%) #28 of 296

85%

Minor dwellings approved

62 decided (1-9 homes)

63%

Major dwellings approved

8 decided (10+ homes)

94%

Change of use approved

17 decided

819

Total decisions

86 refused in the year to March 2026