Planning application
27 Lytton Fields Knebworth Hertfordshire SG3 6BA
Works: Extension Loft or dormer Small domestic
Read from the description, not a valuation. How we read the register
Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.
Proposal
No raising of roof required, flat roof dormers (as existing design), Juliette balconies to rear dormer, extension of porch roof and no single storey rear extension as non-material amendment to planning permission reference 25/03244/FPH granted on 12.02.2026).
As published by the council, reference 26/01483/NMA
Application record
- Reference
- 26/01483/NMA
- Category
- Amendments
- Status
- Decided
- Decision
- Refused
- Received
- 8 Jun 2026
- Validated
- 8 Jun 2026
- Decided
- 23 Jun 2026
- Ward
- Knebworth Ward
- Parish
- Knebworth Parish Council
- Postcode
- SG3 6BA
Site history
Applications at this address on the North Hertfordshire register
This site has had 2 applications since 2026: 0 approved, 1 refused.
-
26/01625/FPH Decided
27 Lytton Fields Knebworth Hertfordshire SG3 6BA
Enlargement of existing front dormer windows and insertion of 2 no. front rooflights. Insertion of rear box dormer with 2 no. Juliette balconies. Replacement flat roof above existing rear element and demolition of existing conservatory. Front porch extension and alterations to fenestration.
Timeline
Dates from the published record
-
8 Jun 2026
Received by North Hertfordshire
-
23 Jun 2026
Decision issued: Refused
-
24 Jul 2026
Added to PlanIndex
Related applications
Cases linked to this one on the register
- Application: 25/03244/FPH (Decided)
What this refusal means
North Hertfordshire refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
27 Lytton Fields Knebworth Hertfordshire SG3 6BA
Enlargement of existing front dormer windows and insertion of 2 no. front rooflights. Insertion of rear box dormer with 2 no. Juliette balconies. Replacement flat roof above existing rear element and demolition of existing conservatory. Front porch extension and alterations to fenestration.
Decided Extension Loft or dormer +2Small domestic -
11 Oak Tree Gardens Knebworth Hertfordshire SG3 6EQ
Erection of single storey rear conservatory
Granted Lawful development Extension 7 docsSmall domestic -
2 Oak Tree Gardens Knebworth Hertfordshire SG3 6EQ
Part conversion of garage to provide home office including replacement door opening on side elevation
Granted Householder 11 docsDomestic -
Caxton Villa 14 Park Lane Knebworth Hertfordshire SG3 6PF
Installation of additional vehicular crossover.
Granted Householder 8 docsDomestic -
25 Deards Wood Knebworth Hertfordshire SG3 6PG
Two storey side and rear extension, raise existing roof ridge height, replace existing windows and replace existing dormer windows following demolition of existing conservatory. Extend the existing driveway within the boundary and creation of vehicular crossover (as variation of previously approved Planning Permission 21/02945/FPH granted 26.01.2022)
Granted Householder Extension Loft or dormer +3 14 docsSmall domestic -
28 Stockens Dell Knebworth Hertfordshire SG3 6BG
First floor front infill extension, single storey front extension and open sided front porch following demolition of existing front extension
Granted Householder Extension DemolitionSmall domestic
Other amendment applications
In North Hertfordshire
-
26/01705/NMA Decided
Irongate Barn Halls Green Weston Hitchin Hertfordshire SG4 7DR
Installation of canopy and brise soleil to the south elevation of the existing concrete barn with additional glazing to the north elevation and relocation of the approved rooflights and an increase in their number from two to four (as Non-Material Amendment to planning permission 25/01141/FP granted 11.12.2025)
-
26/02255/NMA Awaiting decision
Highover Farm Highover Way Hitchin Hertfordshire SG4 0RQ
Revisions to approved plans relating to (i) northern loop road raised table location, (ii) revised details for sub-station, (iii) minor alteration to location of pumping station and associated landscaping (as Non-Material Amendment of planing permission 25/02794/RM granted 06.05.2026)
-
26/02258/NMA Awaiting decision
Land On The North Side Of Pirton Road Holwell Hertfordshire SG5 3SN
Omission of the decorative chimney stacks and brick soldier course detailing shown on the approved elevations to Plots 3, 4, 5 and 6 (as Non-Material Amendment of planning permission 24/01620/S73 granted 03.09.2024)
-
26/02230/NMA Awaiting decision
The Elms The Causeway Therfield Royston Hertfordshire SG8 9PP
Installation of metal windows (as Non-Material Amendment to planning permission 24/00802/FPH granted 17.09.2024)
-
26/02210/NMA Awaiting decision
Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS
External wall insulation and timber boarding added to east wall. Front door design updated, bi-fold doors changed to 6 doors and addiotnal rooflight added to landing outside bedroom 6 (as Non-Material Amendment to Planning Permission 26/00817/FPH granted 03.06.2026)