Object to a planning application in Hillingdon
Every objection in Hillingdon is read by a planning officer who can only weigh material planning considerations against the adopted plan. This page tells you where the application is, how long you have, which policies matter here, and how to write a letter that gets weighed rather than set aside.
Draft an objection or support letter for a Hillingdon application
Enter the application reference from the site notice or letter. Curtilage pulls the application, shows the closing date, and drafts a letter in your words citing only policies that exist. £19 per letter; drafting is free and you pay to unlock.
How objections work in Hillingdon
When an application is validated, Hillingdon notifies adjoining occupiers by letter, posts a site notice, or both. The neighbour consultation normally runs for 21 days. Comments go through the council's own portal (there is a comment link on every application page) or by email to the planning department, and they must give your name and address; anonymous comments are disregarded.
The officer's report will summarise objections under headings such as "residential amenity", "design" and "highways". A letter that already uses those headings, quotes the site-specific facts (which window, how far, which boundary) and names the policy engaged is the one that ends up in the report.
Policies an objection in Hillingdon can cite
From Hillingdon Local Plan (Part 1 Strategic Policies 2012 and Part 2 Development Management Policies 2020), the policies most often engaged by neighbour objections:
| Policy | Title | Covers |
|---|---|---|
| DMHB11 | Design of New Development | daylight and sunlight, design and character, heritage, noise and living conditions, overbearing impact and outlook, house extensions, trees and landscape |
| DMHD1 | Alterations and Extensions to Residential Dwellings | design and character, Green Belt, heritage, highway safety and parking, overbearing impact and outlook, overlooking and privacy, house extensions, trees and landscape |
| DMEI9 | Management of Flood Risk | daylight and sunlight, design and character, flooding and drainage, highway safety and parking, noise and living conditions, house extensions, trees and landscape |
| DMH4 | Residential Conversions and Redevelopment | highway safety and parking, noise and living conditions, overlooking and privacy, house extensions |
| DMHB4 | Conservation Areas | design and character, heritage, overbearing impact and outlook, house extensions, trees and landscape |
| DMHB5 | Areas of Special Local Character | design and character, heritage, overbearing impact and outlook, house extensions, trees and landscape |
| DME6 | Accessible Hotels and Visitor Accommodation; and | design and character, highway safety and parking, noise and living conditions, overlooking and privacy |
| DMH6 | Garden and Backland Development | design and character, highway safety and parking, noise and living conditions, overlooking and privacy, trees and landscape |
| DMHB10 | High Buildings and Structures | daylight and sunlight, design and character, noise and living conditions, overbearing impact and outlook, overlooking and privacy, house extensions, trees and landscape |
| DMHD2 | Outbuildings | design and character, flooding and drainage, heritage, noise and living conditions, house extensions, trees and landscape |
the National Planning Policy Framework (August 2026) applies alongside the local plan. In particular, national policy on living conditions, design and highway safety gives an objection its footing where the local plan is silent.
What does not count
- Loss of a private view
- Effect on the value of your home
- Competition with a business
- The applicant's identity, motives or past behaviour
- Private matters such as covenants, boundary disputes and rights to light as a private right
- Disturbance during construction
Curtilage lists any of these you raise separately and leaves them out of the letter, so the officer reads only the points that carry weight.
Frequently asked
How long do I have to object to a planning application in Hillingdon?
Neighbours are normally given 21 days from the date on the council's letter or site notice. The exact closing date is shown on the application's page on the council portal, and Curtilage shows it when you enter the reference. Many councils still accept comments up to the decision date, but do not rely on that.
What counts as a valid objection in Hillingdon?
Only material planning considerations: overlooking and loss of privacy, loss of daylight or sunlight, an overbearing effect, harm to the character of the area, highway safety and parking, noise, heritage, trees, flooding and conflict with Hillingdon Local Plan (Part 1 Strategic Policies 2012 and Part 2 Development Management Policies 2020) and the National Planning Policy Framework (August 2026). Loss of a view, loss of property value and the applicant personally carry no weight.
Which policies apply in Hillingdon?
Hillingdon Local Plan (Part 1 Strategic Policies 2012 and Part 2 Development Management Policies 2020), adopted 2012-11-08, together with the National Planning Policy Framework (August 2026). Curtilage holds 114 of these policies and cites only ones that exist.
Can I write a letter of support instead?
Yes. The same tool drafts a letter of support for an applicant or a neighbour who wants the scheme approved, grounded in the same policies.
Data: the Hillingdon register via the PlanIt aggregator, the council's adopted plan and the National Planning Policy Framework (August 2026), both under the Open Government Licence. Page updated 2026-09-14. Curtilage is not legal advice.