Planning permission in Harrow

We don't yet have enough recent decisions in Harrow to show a reliable approval rate. The figures below cover all application types on record.

Across all application types, 78.1% of 6,625 applications decided since May 2023 were approved. Based on Harrow's public planning register. Data last updated: 17 May 2026.

9,043Total applications

6,625Decided

78.1%Approval rate (of decided)

5,175 Approved+1,450 Refused+380 Withdrawn+0 Pending+2,038 Outcome not determined=9,043 Total

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By Development Category

All applications on record, not only the last 12 months.

Category	Decided	Approved	Refused	Approval rate
Home extensions and alterations (householder)	2,196	1,703	493	77.6%
Prior approval (permitted development)	1,060	837	223	79.0%
Certificate of lawfulness (confirming permitted development)	836	699	137	83.6%
Full planning applications	783	472	311	60.3%
Discharging planning conditions	532	445	87	83.6%
Certificate of lawfulness (existing use)	356	262	94	73.6%
Protected tree works (TPO)	235	235	0	no refusals recorded
Tree works in a conservation area	150	150	0	no refusals recorded
Minor amendment to an approved scheme (S96a)	114	78	36	68.4%
Changing a planning condition (S73)	89	59	30	66.3%
Advertisement Consent	70	62	8	88.6%
Phone masts and telecoms	59	54	5	91.5%
Listed Building Consent	45	42	3	93.3%
Adjacent Authority Consultation	39	37	2	94.9%
Larger extensions (householder prior approval)	30	25	5	83.3%
Other*	31	15	16	mixed types

Protected tree works (TPO): no refusals are recorded in this category for this authority, so no approval rate is shown.

Tree works in a conservation area: no refusals are recorded in this category for this authority, so no approval rate is shown.

* Other combines smaller categories: Outline Planning (11), Demolition (4), Barn to home conversion (prior approval, Class Q) (3), Environmental impact screening and scoping (3), Cert.Lawful Existing Devt. (DEL) (3), Dead of Variation (S106) (2), Reserved matters (detail after outline approval) (1), Prior Approval (Miscellaneous Acts) (1), Approval of Details (DEL) (1), Prior Agricultural Approval (All Types) (1), Permission in Principle (1).

Quarterly Trend

The most recent three years. Earlier decisions are included in the totals above but not in this chart.

Quarter	Decided	Approved	Approval rate
Q3 2023	415	282	68.0%

By Ward

The 12 wards with the most decided applications, across all years. 813 further decided applications fall in wards not shown.

Among wards with at least 20 decided applications, approval rates range from 67.4% in Edgware to 86.0% in Hatch End, a gap of 18.6 percentage points.

Ward	Decided	Approved	Refused	Approval rate
Pinner	507	413	94	81.5%
Pinner South	461	365	96	79.2%
Stanmore	438	346	92	79.0%
Harrow Weald	399	304	95	76.2%
Roxeth	384	289	95	75.3%
Harrow on the Hill	341	287	54	84.2%
Headstone	333	264	69	79.3%
Hatch End	321	276	45	86.0%
North Harrow	294	234	60	79.6%
Centenary	287	219	68	76.3%
Marlborough	286	226	60	79.0%
Edgware	282	190	92	67.4%

Frequently asked questions

What is the planning approval rate in Harrow?

Across all application types, 78.1% of 6,625 applications decided in Harrow since May 2023 were approved.

Do I need planning permission in Harrow?

It depends on the project and the property. Many home projects fall under permitted development rights, but constraints such as conservation areas, listed buildings and Article 4 directions change what needs permission at a specific address. See our guides to permitted development rights and Article 4 directions.

Do I need a planning consultant in Harrow?

Many home projects do not need one. A straightforward extension on an unconstrained property is often handled directly with the council, or with an architect or agent preparing the drawings. A consultant is more likely to earn their fee where the site is constrained, the council has refused similar schemes, or an appeal is in prospect. Understanding your property's constraints and the council's recent decisions first makes any conversation with a professional a better-informed one.

Planning guides

Not sure what you can build without planning permission? See our guides to permitted development rights, Article 4 directions and planning costs.

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