Hillingdon Planning Portal: Search & Applications
Find Hillingdon Planning Records Before You Comment or Apply
Use this guide to search Hillingdon planning applications online, use the consultation map, comment with planning reasons, check planning permission for an extension and avoid invalid application delays.
Hillingdon’s planning search, map, comments, Planning Portal application route, validation checklist, duty planner and contact details all serve different tasks. Pick the right route before you pay, upload or object.
Quick answer: use Hillingdon’s planning applications search to find the details, progress and status of planning applications. Search with one criterion at a time: full reference number, first address line/street, ward, undecided status, received dates or decided dates. Use the map only for applications currently out to consultation.
For a new application, Hillingdon says the fastest route is the Planning Portal. If files exceed the Planning Portal upload limit, send the supporting files separately to applicationsprocessingteam@hillingdon.gov.uk. If you need planning permission contact by phone, Hillingdon gives 01895 250230 for planning payment/callback handling.
Choose the Correct Hillingdon Council Portal Route
The phrase “Hillingdon planning portal” can mean search, map, comments, planning permission, extensions, the Planning Portal, or planning contact details. Use the route below first.
Search planning applications
Use Hillingdon’s Ocella planning search for existing applications, status, progress, documents, decision notices and officer details.
Use the consultation map
Use the ArcGIS map for applications currently out to consultation. It can search by street/reference, show pins and identify applications within a radius.
Comment on an application
Open the application, read plans and documents, click “Enter comment”, fill in details and submit a planning-focused comment.
Check extension permission
Check permitted development, Hillingdon Article 4 directions, conservation/listed constraints, trees, building control and whether a Lawful Development Certificate is safer.
Submit a new application
Use Planning Portal for most new applications, then follow Hillingdon validation requirements and send oversized supporting files separately if needed.
Contact planning
Use 01895 250230 for planning payment/callback routes, planning@hillingdon.gov.uk for duty planner requests and applicationsprocessingteam@hillingdon.gov.uk for application processing issues.
Hillingdon Planning Portal Search: Best Order
Hillingdon’s official search guide says to enter one search criterion only. Do not paste the full neighbour letter, site notice text or multiple filters at once.
Use the full planning reference first
The cleanest search is the exact reference from a site notice, neighbour letter, officer email, weekly list, agent document or decision notice.
If no reference, use the first address line or street
Use the first full line of the address or street name. For flats, estates, corner plots and land parcels, simplify the address before assuming there is no record.
Use ward or dates for wider checking
Use ward search, received date or decided date when checking recent planning applications online across an area.
Use the undecided checkbox carefully
The undecided filter can show live applications, but Hillingdon says you may need to refine it with location, ward or received dates.
Open the reference, then documents
Search results are only the start. Open the application record, check status, proposal, dates, case officer and all available application documents.
Hillingdon Planning Map Search and Radius Tool
Hillingdon’s map displays planning applications currently out to consultation. It is best for finding nearby live cases, not for proving legal boundaries or checking every historic planning decision.
Use the map when
- You know the street or area but not the reference.
- You want applications currently open for consultation.
- You need to click pins and open the application details.
- You want to search by street name or planning reference.
- You want to identify all applications within a radius of an address or point.
Use the map safely
- Click a pin to view reference, address and description.
- Use “more information” to open the full application record.
- Use the question mark tool for the radius search.
- Use ward query when checking all open consultations in a ward.
- Confirm the legal site using the location plan and decision notice.
Documents to Read Before You Comment, Buy or Build
Hillingdon planning applications online can include application forms, plans, supporting documents, validation checklists, officer reports and decision notices. Do not rely only on the proposal summary.
Location and block plans
Check red-line site boundary, access, parking, outbuildings, trees, garden land, neighbouring buildings and whether the proposal affects land outside the applicant’s ownership.
Existing and proposed drawings
Compare floor plans, elevations, roof plans, sections, scale, revision dates and whether a proposed plan is marked amended or superseded.
Technical reports
Look for daylight/sunlight, tree survey, heritage statement, transport assessment, flood risk, drainage, noise, air quality, ecology, BNG and fire statements where relevant.
Decision notice
Read approval/refusal wording, approved plan numbers, conditions, reasons for refusal, discharge requirements and any time limit before work starts.
Officer report
Officer reports explain policy assessment, consultee responses, neighbour comments, material considerations and why a recommendation was made.
Amended or superseded plans
If a file says amended, revised or superseded, check the latest version before commenting or relying on dimensions.
Comment, Object or Support on a Hillingdon Planning Application
Hillingdon says the quickest way to share your views is to submit an online comment. Read the plans first, then use planning issues rather than personal or private disputes.
Search and open the application
Search the application, click the reference number in results, then open the documents and plans.
Click “Enter comment”
Fill in your details, select whether you are for or against, and keep the comment within the form’s character limit. If you exceed the limit, submit a second comment and label it clearly.
Use material planning issues
Hillingdon lists issues such as neighbour privacy/daylight, size, appearance, parking, traffic, access, noise and other planning impacts.
Do not include sensitive personal data
Hillingdon warns that comments are open to the public by law. Avoid personal, medical, confidential or identifying information unless essential.
| Useful planning points | Weak or non-planning points |
|---|---|
| Privacy, overlooking, daylight and sunlight impacts. | Loss of private property value. |
| Scale, design, appearance, height and materials. | Moral objections or personal dislike of the applicant. |
| Parking, traffic, access, servicing and highway safety. | Private boundary, covenant or party wall disputes. |
| Noise and amenity impacts from the completed development. | Construction noise as a reason to refuse the scheme. |
| Heritage, trees, flood risk, SuDS, ecology and planning policy. | Repeated copy-paste objections with no site-specific evidence. |
Hillingdon Planning Permission for Extension Checks
Many Hillingdon extension searches are really about whether a householder project needs permission, prior approval, a Lawful Development Certificate or only building regulations approval.
Check permitted development first
A small extension may be permitted development in some cases, but Hillingdon Article 4, conservation areas, listed buildings, previous permissions or conditions can remove that route.
Use an LDC for formal proof
A Certificate of Lawful Development is useful when you need written proof that a proposed extension or outbuilding is lawful before selling, refinancing or starting work.
Building control is separate
Planning permission considers planning impact. Building regulations consider construction, structure, fire, drainage, insulation and safety. You may need both.
Hillingdon Article 4 Warning for Large Rear Extensions
Hillingdon has an important local rule for extension searches. Its Article 4 Direction removes permitted development rights for residential extensions extending beyond the rear wall of the original dwellinghouse by more than 4 metres, and it applies to all of the London Borough of Hillingdon.
| Extension issue | Why it matters in Hillingdon | What to check |
|---|---|---|
| Rear extension over 4m | Hillingdon Article 4 can require planning permission where permitted development might otherwise be assumed. | Check Article 4 direction before building or applying for fast-track LDC. |
| Side extension | Can affect street scene, parking, neighbours, corner plots and gaps between houses. | Use existing/proposed plans, elevations and boundary distances. |
| Loft or roof extension | Can affect roof form, conservation character, side windows and overlooking. | Check roof plans, elevations, materials and any conservation/listed constraints. |
| Outbuilding | May affect garden character, trees, access, use as independent accommodation and neighbours. | Check lawful use, height, boundary distance, services and intended use. |
| Basement | Hillingdon validation checklist can require basement impact assessment or structural survey. | Check flood risk, structural method, construction impacts and drainage. |
Apply for Hillingdon Planning Permission Online
Hillingdon says the fastest way to submit your application is online through the Planning Portal. Do the local validation checks before uploading.
Before opening Planning Portal
- Confirm the correct application type.
- Check whether an LDC, prior approval, householder application or full application is needed.
- Prepare the correct ownership certificate and any notices.
- Calculate the fee using the Planning Portal calculator.
- Prepare location plan, block plan and all required scaled drawings.
- Check Hillingdon’s validation checklist for local requirements.
If files are too large
- Submit the main application through Planning Portal where possible.
- Clearly label each supporting document and plan.
- Email oversized supporting files separately to applicationsprocessingteam@hillingdon.gov.uk.
- Include the Planning Portal reference or application number.
- Do not email confidential data mixed into public planning documents.
Hillingdon Validation Checklist PDF Converted Into Practical Steps
Hillingdon’s Local Planning Validation Checklist is the document that prevents many avoidable delays. Applications are checked on receipt; if they fail validation, the applicant or agent is notified and given time to provide the missing information.
| Checklist requirement | What it means | Applicant action |
|---|---|---|
| Correct application form | Use the right 1APP/Planning Portal form for the application type. | Do not use a householder form for a change of use or listed building route. |
| Correct fee | The application cannot progress until the appropriate fee is received. | Use the Planning Portal fee calculator or Hillingdon planning payment route. |
| Location plan | Usually 1:1250 or 1:2500, showing the site edged red. | Check the red line includes all land needed for the proposal. |
| Site/block plan | Usually 1:100, 1:200 or 1:500 depending on application type. | Show boundaries, access, parking, trees, outbuildings and neighbouring context. |
| Floor plans, elevations, sections and roof plans | Usually required at 1:50 or 1:100 for building works. | Label existing and proposed drawings separately and include revision numbers. |
| Ownership/agricultural holdings certificate | Confirms who owns land affected by the proposal. | Use the correct certificate and serve notices where required. |
| Local requirement reports | Can include CIL, trees, flood risk, heritage, daylight/sunlight, drainage, transport, noise, ecology, fire or planning statement. | Check the application-type checklist before uploading. |
Plans, Drawings and Reports Hillingdon May Need
Use this as a pre-upload check. The exact list depends on the application type and site constraints.
Householder application essentials
- Completed householder application form.
- Location plan edged red at 1:1250 or 1:2500.
- Existing and proposed block plan.
- Existing and proposed floor plans.
- Existing and proposed elevations.
- Ownership/agricultural holdings certificate.
- Appropriate fee.
- CIL form, flood risk, heritage, tree or parking/access details where triggered.
Full application common triggers
- Design and access statement for major or designated-area cases.
- Air quality, flood risk, drainage/SuDS or contamination reports.
- Arboricultural impact assessment or tree survey.
- Heritage statement for conservation/listed/local heritage context.
- Daylight/sunlight, noise, transport or parking assessment.
- Fire statement for relevant major buildings.
- Planning statement, CIL form and GLA data where required.
Duty Planner and Pre-Application Advice in Hillingdon
Hillingdon encourages discussion before development applications and offers formal pre-application advice. It also has a free duty planner service covering residential advice to third parties affected by proposals.
When pre-application advice is useful
- Complex or large extensions.
- Certificate of lawfulness or prior approval uncertainty.
- Basements, listed buildings, conservation areas or locally listed buildings.
- Major development, viability, daylight/sunlight or retail impact issues.
- Transport, flood risk, drainage, ecology, trees or airport safeguarding concerns.
How the process works
- Complete the relevant pre-application form.
- Email the form, plans and supporting documents to applicationsprocessingteam@hillingdon.gov.uk.
- Identify which service you are requesting from the charging schedule.
- Pay the pre-planning fee if required.
- For duty planner advice, email planning@hillingdon.gov.uk.
Fast-Track Lawful Development Certificate and Prior Approval
Hillingdon offers an optional fast-track service for certain householder routes. It speeds up administration and review, but it does not guarantee approval.
Fast-track LDC
Hillingdon says householder Lawful Development Certificate applications can be determined within 21 days following receipt of the fast-track fee.
Fast-track prior approval
Householder prior approval applications can be determined within 28 days following receipt of the fast-track fee.
SuDS, Drainage and Flood Risk in Hillingdon Planning
Hillingdon says sustainable drainage is now a material planning consideration. SuDS manage surface water quantity, water quality and amenity, often using measures that slow rainfall close to where it falls.
Drainage options mentioned by Hillingdon
- Green roofs.
- Permeable paving.
- Swales.
- Ponds.
- Drainage assessment and plans including SuDS details.
Where drainage evidence is likely
- Major development.
- Flood Zone 2 or 3 sites.
- Basement or ground-floor extension in flood-risk areas.
- Hardstanding, car parking and site access changes.
- Sites with known drainage or surface-water constraints.
Hillingdon Planning Permission Contact Number, Emails and Payments
Use the right contact route to avoid delays. Do not send sensitive personal information inside public application documents or planning comments.
| Need | Contact route | Use this for |
|---|---|---|
| Planning payment without reference | 01895 250230 | Call and log a 24-hour callback request to pay by card when you do not have a planning reference. |
| Planning register / general planning contact | planning@hillingdon.gov.uk / 01895 250230 | General planning register queries, planning information and public-register route. |
| Oversized application files | applicationsprocessingteam@hillingdon.gov.uk | Send supporting files that exceed the Planning Portal size limit, clearly referencing the application. |
| Duty planner | planning@hillingdon.gov.uk | Free residential third-party advice by telephone appointment or email. |
| Party wall notice to the council | partywallnotices@hillingdon.gov.uk | Use only where the adjoining property is owned by the council and a party wall notice is required. |
Appeals, Enforcement and Post-Decision Checks
A Hillingdon planning decision is not just “approved” or “refused”. Conditions, appeals, committee reports and enforcement records can all matter.
Appeal rights
Hillingdon says applicants can appeal if an application is refused, not decided in time or granted with conditions they disagree with. Third parties do not normally have a right of appeal.
Appeals search
Use the appeals search when checking an appeal reference, linked planning application, location, ward or lodged date range.
Before work starts
Read the decision notice, approved plan numbers, time limit, conditions and whether details must be approved before construction or occupation.
Possible breach
Search planning history first. Then gather address, dates, photos, description and any approval or condition reference before raising an enforcement issue.
Hillingdon Local Planning Tips Generic Pages Miss
Hillingdon is not just another London borough search page. Local context can affect extensions, logistics, flood risk, transport and airport-related proposals.
Airport safeguarding
Hillingdon validation lists airport safeguarding reports as a local requirement for some proposals. Height, lighting, cranes, landscaping and birds can matter near aviation-sensitive areas.
Article 4 and extensions
Large rear extensions are a key Hillingdon-specific check. Always check Article 4 before assuming a national permitted-development route applies.
Parking and access
Hillingdon validation can require vehicle parking and access details. This is important for extensions, HMOs, change of use, flats, commercial sites and schools.
Trees and conservation
Tree surveys may be needed for protected trees or conservation-area sites. Show trees early on your block plan, not after the first validation query.
Basements and flood risk
Basements can trigger basement impact/structural survey and flood-risk evidence, especially in Flood Zones 2 or 3 or sensitive drainage locations.
Public documents
Hillingdon warns that applications, supporting documents and comments may be published online or made available for public inspection. Remove unnecessary sensitive data before submission.
Related UKPlanningPortal Guides for Similar Search Tasks
These internal links are relevant because they explain similar London planning portal search, comments, map and application workflows without competing directly with Hillingdon intent.
Useful Official Hillingdon Planning Links by Task
Use the official link that matches your task. Keep your reference number, site address, ward, plan files, fee details or draft comment ready before opening the service.
Independent guide note: this page helps you understand Hillingdon planning tasks before acting. Always verify live deadlines, fees, application status, forms and legal requirements on Hillingdon Council, GOV.UK or Planning Portal before submitting anything.
Hillingdon Planning Portal FAQs
Where do I search Hillingdon planning applications?
Use Hillingdon’s planning applications search. Search by one criterion at a time: full reference number, location, ward, agent, undecided status, received dates or decided dates.
Can I search Hillingdon planning applications online by map?
Yes. Hillingdon’s map displays planning applications currently out to consultation. You can click pins, zoom, search by street or reference, and use the radius tool to find applications near an address or point.
How do I comment on a Hillingdon planning application?
Search for the application, click the reference number, read the related documents and plans, click “Enter comment”, fill in the required details and submit the comment online.
Are Hillingdon planning comments public?
Yes. Hillingdon says comments are open to the public by law and will not be redacted in the way some personal data is hidden, so do not include sensitive or identifying personal information.
What can I object to on a Hillingdon planning application?
Use planning issues such as privacy, daylight, size, appearance, parking, traffic, access, noise and planning impact. Hillingdon will not consider non-planning issues such as property values or moral issues.
Do I need Hillingdon planning permission for an extension?
You may need permission depending on size, location, Article 4 directions, conservation/listed status, previous conditions and permitted development limits. Hillingdon has an Article 4 direction affecting large rear extensions over 4 metres borough-wide.
How do I apply for Hillingdon planning permission?
Hillingdon says the fastest way is through the Planning Portal. Check the validation checklist first, prepare the correct plans and certificates, pay the fee and email oversized supporting files separately if required.
What is the Hillingdon planning permission contact number?
Hillingdon gives 01895 250230 for planning payment/callback handling when you do not have a planning reference. For duty planner requests, use planning@hillingdon.gov.uk.
Why might my Hillingdon planning application be invalid?
It may be invalid if the form, fee, location plan, block plan, scaled drawings, ownership certificate, CIL form, flood risk, heritage statement, tree report, drainage details or other required supporting information is missing.
Can neighbours appeal a Hillingdon planning decision?
No. Hillingdon says only the original applicant has the normal right to appeal a planning decision. Third parties do not have a right of appeal if they disagree with the decision.