159 Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PR Data via plota.co.uk

26/02149/FPH - Full Permission Householder Registered

Proposal

Single storey rear and front extensions following demolition of existing rear element. Data via plota.co.uk

Track application Save this application and get an email when its status or decision changes. Alerts nearby Get email alerts for new planning applications near this address.

View original council record ↗Last checked 11 Sept 2026, 07:40

Application progress

✓

Received

10 Sept 2026

Decision

Expected by 5 Nov 2026

This application is under consideration - no decision has been issued yet. Plota predicts a decision around 28 Oct 2026, from North Hertfordshire's recent extensions. Comments are open until 10 Oct 2026.

Comment on this application ↗

Documents

View the documents on the council's website ↗

Site constraints 2

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.

Agricultural land, grade 3a

Best and most versatile land (grades 1, 2 and 3a). Predicted from the national soil map. The older provisional map agrees.

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.

Not affected

Outside flood zones 2 and 3 · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England 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.

Work with planning data?

Every application in North Hertfordshire - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Other new applications on this street

8 Sept 2026Pending

66 Park Lane Knebworth Hertfordshire SG3 6PW

Details reserved by Condition 6 (Construction Method Statement) of outline plann...

26/02159/DOC

3 Sept 2026Pending

77 Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PP

Erection of one detached three-bedroom dwelling including detached double garage...

26/02039/FP

13 Aug 2026Pending

Land Adjacent To 67 Park Lane Knebworth Hertfordshire SG3 6PW

Erection of building for church hall use including car parking, hard and soft la...

26/02035/FP

Nearby new applications

3 Sept 2026Pending

77 Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PP

Erection of one detached three-bedroom dwelling including detached double garage...

26/02039/FP

2 Sept 2026Pending

Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS

External wall insulation and timber boarding added to east wall. Front door desi...

26/02210/NMA

Important details

Council: North Hertfordshire
Application type: Full Permission Householder
Postcode: SG3 6PR
Received: 10 Sept 2026
Validated: 10 Sept 2026
Ward: Knebworth Ward
Parish: Knebworth Parish Council
Case officer: Show
Applicant: Show
Agent: Show

Decision outlook

Day 2 of the 56-day target. North Hertfordshire usually decides extensions by day 48.

prediction

Day 254 days to the 56-day target

79%decided within 8 weeks

91%approved

439decided in the last year

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 11 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference: PP-15186822
Comments by: 10 Oct 2026

North Hertfordshire

Planning Authority Score

6.9/10

Good

#66 of 296 councils

Relevant to this application:

Householder decisions

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%).

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

North Hertfordshire decision statistics

Based on MHCLG data, the year to March 2026

93%

Overall approval rate

Above avg (87%) #62 of 296

95%

Householder approved

Above avg (90%) #87 of 296

69%

Decided in 8 weeks

Above avg (63%) #128 of 296

32%

Extended time limit

Below avg (41%) #65 of 296

82%

Minor dwellings approved

112 decided (1-9 homes)

84%

Major dwellings approved

19 decided (10+ homes)

90%

Change of use approved

21 decided

1,102

Total decisions

82 refused in the year to March 2026