Planning application
5/2026/1324
31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub
Proposal
Certificate of Lawfulness (proposed) - Proposed rear single-storey extension, side single-storey extension, removal of rear chimney stack and replacement porch
As published by the council, reference 5/2026/1324
Timeline
Dates from the published record
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8 Jul 2026
Received by St Albans
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9 Jul 2026
Validated
Checked as complete and ready for consideration.
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17 Jul 2026
Decision issued: Certificate of Lawfulness Refused
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24 Jul 2026
Added to PlanIndex
What refusal means
The process from here
The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.
Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
-
5/2026/1016 Decided
46 Chesterton Avenue Harpenden Hertfordshire Al5 5Su
New porch and conservatory
-
5/2026/0893 Decided
94 Topstreet Way Harpenden Hertfordshire Al5 5Ts
Application for amendments to planning approval reference 5/2021/0124 including change from pebbledash to smooth render, removal of rooflights to side extension, repositioning of eaves of side extension to inside of boundary line and changes to internal l
-
5/2025/2124 Decided
43 Fairmead Avenue Harpenden Hertfordshire Al5 5Ud
Demolition of existing conservatory, erection of a two storey side extension, part single part two storey rear extension, rear dormer and 3no rooflight to the front elevation
-
5/2026/1177 Decided
52 Alzey Gardens Harpenden Hertfordshire Al5 5Sy
Conversion and extension of detached garage with replacement roof over
-
5/2026/0387 Decided
54 Alzey Gardens Harpenden Hertfordshire Al5 5Sy
Two storey side, rear and front extension, porch canopy, garage conversion, landscaping to front garden to provide off street parking, alterations to external openings and materials and installation of new fencing
-
5/2026/0792 Decided
50 Alzey Gardens Harpenden Hertfordshire Al5 5Sy
Single storey side and rear extension, window alterations
Other lawful development applications
In St Albans
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5/2026/1430 Decided
42 Holywell Hill St Albans Hertfordshire Al1 1Bx
Certificate of Lawfulness (proposed works to a Listed Building) - Replace master bathroom suite on 1st floor of property. Modern bathroom to be replaced with new suite, including new shower cubicle. It will use existing water and waste routes , and tiling
-
5/2026/0901 Granted
37 Saxon Road Wheathampstead Hertfordshire Al4 8Nz
Certificate of Lawfulness (proposed) - Timber framed garden room to be built on ground screw foundation. Dimensions 3m x 4.2 & under 2.5m in height. This will be 1.4m distance from boundary to neighbour. This will be situation at the end of the garden
-
5/2026/1399 Decided
10 Birchwood Way Park Street St Albans Hertfordshire Al2 2Sg
Certificate of Lawfulness (proposed) - Loft conversion with rear dormer and 3No. roof lights to front elevation
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5/2026/1031 Granted
5 Flamsteadbury Lane Redbourn Hertfordshire Al3 7Dh
Certificate of Lawfulness (proposed) - Construction of single storey rear 3m extension, maximum eaves height 3m and maximum ridge height 4m
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5/2026/1035 Refused
30 Culver Road St Albans Hertfordshire Al1 4Ed
Certificate of Lawfulness (proposed) - Loft conversion with rear dormer and two velux to front