Search, Apply and Comment on Cornwall Planning Cases
Use this guide when you need to find a Cornwall planning application, read the submitted drawings, check whether permission may be needed, or make a clear comment before the consultation window closes.
It also explains the official validation traps that delay applications in Cornwall, including plan scale, red-line boundaries, BNG, trees, heritage, drainage, public rights of way and the Planning Portal upload route.
Quick answer: Cornwall Council’s online planning register is the main place to search, view, track and comment on planning applications in Cornwall. If you want to apply, Cornwall Council encourages electronic submission through the Planning Portal, but the Planning Portal is not run by Cornwall Council.
For applicants, the most important step before upload is checking the Cornwall Council Validation Guide. The guide separates national requirements from local Cornwall requirements, and missing information can make the application invalid before a planning officer starts assessing the proposal.
Choose the Right Cornwall Planning Route
The same keyword can mean very different jobs. Start with the path that matches your real task, then use the official links near the end only after you understand what to do.
I need to find an application
Use the online planning register. Search by application reference, address, road, parish, postcode area or proposal keyword, then open the documents tab before relying on the summary.
I want to object or support
Read the current plans first, then comment on planning issues such as scale, design, overlooking, highway safety, drainage, ecology, heritage or policy conflict.
I want to change my home
Check permitted development, Article 4 directions, listed building restrictions, conservation areas and building regulations before assuming a full planning application is needed.
I need to apply
Prepare the right form, fee, ownership certificate, location plan, block plan and supporting reports. Upload through the Planning Portal where suitable.
I suspect unauthorised work
Planning enforcement is separate from commenting on a live application. Use the breach reporting route if work, land use or conditions appear unauthorised.
I am buying a property
Check planning history, approved plan numbers, conditions, discharge records, building control, listed status and any unresolved enforcement concern before exchange.
How to Search the Online Planning Register
Cornwall Council’s register can show live applications, archived information, comments, documents, decision notices and alerts. It is more reliable than an old search snippet, a neighbour’s screenshot or a property listing.
Use the strongest search term first
The application reference is best. If you do not have it, try the full address, road name, property name, parish, partial postcode or a distinctive proposal keyword such as “annexe”, “holiday let”, “Class Q” or “solar”.
Broaden rural and village searches
If a named cottage or farm does not appear, search the lane, hamlet, parish or part-postcode. Cornwall property names and rural addresses are not always recorded exactly as locals say them.
Open the application record
Check proposal description, application type, status, important dates, case officer, parish, ward, consultee responses and whether the application is still open for comments.
Use the documents tab
Do not stop at the summary. The documents tab is where you usually find location plans, drawings, statements, ecological reports, heritage reports, objections, officer reports and decisions.
Save or track the search
Register for an account if you want alerts for a specific application, property, postcode area or parish. For a broad area, Cornwall Council recommends widening a postcode search rather than using only one full postcode.
Read a Planning Record Like a Case Officer
Many users miss the important file because they read only the proposal line. Use this table to understand what each record or document is likely to tell you.
| What you see | What it means | Micro-check before acting |
|---|---|---|
| Application reference | The unique planning case number. | Quote this in comments, emails, notes and property searches so the case cannot be confused with a nearby application. |
| Status line | Shows whether the case is pending, decided, withdrawn, invalid, refused or approved. | If the status changed recently, check documents for amended plans, re-consultation or a decision notice. |
| Location plan | Shows the land included in the application. | Check the red line, access, parking area, garden land and whether the site boundary matches the proposal. |
| Block or site plan | Shows the proposal in relation to boundaries, roads and nearby buildings. | Look for access, public rights of way, trees, drainage, levels, visibility splays and relationship with neighbours. |
| Elevations and floor plans | Show the existing and proposed building form. | Check height, windows, roof shape, materials, overlooking and whether the drawings are the latest revision. |
| Design, heritage or ecology statement | Explains why the applicant believes the scheme is acceptable. | Compare the statement against the actual site, local character, listed buildings, habitats and policy constraints. |
| Officer report | Explains the planning assessment and recommendation. | Read policy balance, consultee responses, public comments, conditions and reasons for approval or refusal. |
| Decision notice | The formal approval, refusal or condition list. | Check approved plan numbers, time limits, pre-commencement conditions and any restrictions on use. |
How to Comment, Object or Support Properly
Cornwall Council says online register comments are the quickest option. Email comments are no longer accepted for planning applications, and hard-copy comments can take longer to process.
Planning points that can matter
- Overlooking, loss of privacy or poor window placement.
- Design, scale, massing, materials or harm to local character.
- Highway safety, visibility, parking, turning and access.
- Flooding, surface water, foul drainage or critical drainage constraints.
- Impact on trees, hedgerows, biodiversity, bats, birds or habitats.
- Listed building, conservation area, archaeology or historic setting harm.
- Conflict with the Cornwall Local Plan, neighbourhood plan or relevant design guidance.
Points that are usually weak
- Loss of private view without a wider planning impact.
- House price concerns.
- Personal criticism of the applicant, agent or neighbour.
- Boundary ownership disputes that need legal advice.
- Normal construction disturbance during permitted working hours.
- Repeated copy-and-paste objections with no site-specific evidence.
- Speculation without measurements, photos, plan references or policy reasoning.
Start with the application reference
Write the reference number, address and proposal. If you are commenting on a revised plan, state the drawing number or revision date.
Explain your relationship to the site
Say whether you live next door, use the road, represent a local group, own nearby land, operate nearby premises or are commenting as a resident.
Use short headings
Break your comment into design, access, drainage, ecology, privacy, heritage or policy. This makes your comment easier to review.
Give evidence, not only opinion
Use photos, measured distances, road observations, plan numbers, policy references, flood history or neighbour relationship details where relevant.
Ask for a clear outcome
You may ask for refusal, amended plans, obscure glazing, tree protection, drainage details, construction access controls, a condition or further technical assessment.
Check Whether Planning Permission Is Actually Needed
Not every home or business change needs a full planning application. But in Cornwall, listed buildings, conservation areas, Article 4 directions, rural sites, access changes, holiday use, drainage and ecology can change the answer.
Householder projects
Extensions, outbuildings, roof changes, balconies, raised decking, cladding, access changes and boundary walls may be permitted development in some cases, but not all.
Heritage or conservation
Listed building consent, conservation area controls or local design guidance may apply even where a similar project elsewhere looks straightforward.
Dropped kerb and access
Creating or changing access can require planning permission depending on road category and location. A separate vehicle crossover licence may also be needed.
HMO or change of use
Changing how a property is used can require permission even when little building work is proposed. Check HMO, business, holiday use and mixed-use guidance.
Solar, EV and heat pumps
Many installations can be permitted development, but limits, noise, siting, listed status and property designations can matter.
Lawful Development Certificate
If you need formal certainty, a lawful development certificate can confirm whether existing or proposed work is lawful.
Apply Online Without Creating Avoidable Problems
Cornwall Council encourages electronic submission. The Planning Portal lets applicants complete the form, upload supporting documents and pay fees online, but Cornwall Council notes that it is not run by the Council.
Before opening the Planning Portal
- Choose the correct application type.
- Prepare ownership certificate A, B, C or D as required.
- Check whether agricultural tenants must be notified.
- Prepare a location plan and block plan on an up-to-date map.
- Check whether CIL, ecology, BNG, heritage, drainage, tree or PROW information is needed.
- Confirm the planning fee and any service charge before payment.
Upload and payment checks
- Keep PDFs clear, upright and logically named.
- Upload each drawing as a separate labelled document.
- Do not rely on a file-share link unless Cornwall Council has agreed it.
- Remember the Planning Portal file limit is higher than before, but large reports should still be prepared carefully.
- If submitting after a withdrawal, refusal, approval or returned application, create a new application rather than using the amend function.
Official Validation Guide PDF: What It Means in Practice
The Cornwall Council Validation Guide is not just a paperwork checklist. It decides whether your application is complete enough to be registered and assessed. The current council page says the Validation Guide was updated to version 1.7 on 10 April 2024, and the live validation page shows the current average validation time separately.
| Validation topic | Official meaning | How to avoid delay |
|---|---|---|
| National requirements | Required by legislation, such as form, fee, plans and certificates. | Complete every form field, upload correct plans and pay the correct fee before submission is released. |
| Local requirements | Set by the Local Planning Authority for Cornwall-specific validation needs. | Check the application type in the Validation Guide and identify ecology, heritage, drainage, land stability, highways or other reports early. |
| Missing information | If required information is missing, the application can be marked invalid and further information requested. | Respond quickly and completely. The guide explains that no further action is taken until the missing information is provided. |
| Returned application risk | Applications can be closed if missing information is not supplied within the council’s invalid-letter process. | Keep your agent responsive and avoid submitting a “near complete” application just to get a reference number. |
| Administration deduction | The guidance refers to a deduction from refunded money where invalid applications are returned after processing has started. | Use the validation checklist before paying and uploading, especially for complex or constraint-heavy sites. |
Top Invalid Reasons Applicants Should Fix First
The official “make a better application” page lists common reasons applications are invalid on receipt. Use these as a pre-submit audit before you upload.
Document and fee problems
- Missing CIL form where required.
- No fee or incorrect fee paid.
- Missing foul drainage assessment form where required.
- Missing contaminated land report where required.
- Missing Flood Risk Assessment for development in a Critical Drainage Area.
Plan and site problems
- Public Right of Way affected or influenced but not shown on the block/site plan.
- Incorrect site location plan.
- No north point or no correct scale.
- Access to the highway not shown where relevant.
- Incorrect red-line boundary.
- Plans marked “do not scale” without suitable planning wording.
- Missing heritage, bat, bat-and-barn-owl or other required survey.
Plan and Drawing Rules from the Validation Guide
Poor plans are one of the easiest ways to lose time. The Validation Guide sets out plan standards that help Cornwall Council, consultees and the public understand the proposal.
Use metric scale and scale bar
Plans should be drawn to an identified standard metric scale and include a linear scale bar. If a plan says 1:100 at A3, provide it at the correct size electronically or in hard copy.
Show north and up-to-date mapping
Location and block plans should show north and be based on an up-to-date map. Do not use a Cornwall Council mapping page screenshot with a watermark as your planning plan.
Name each file clearly
Upload plans in the correct orientation, with logical names, plan numbers and one drawing per document where possible. This makes public review and validation faster.
Biodiversity Net Gain in Cornwall Before You Submit
BNG is now one of the biggest validation and timing risks for many applications. Cornwall Council explains that developers must deliver a 10% biodiversity net gain, with mandatory BNG applying nationally to major development from 12 February 2024 and minor and other applicable applications from 2 April 2024.
| BNG issue | What applicants should check | Why it matters |
|---|---|---|
| Does mandatory BNG apply? | Check the application type and exemptions carefully. | Cornwall Council says even if you think an exemption applies, some level of information may still be required. |
| Pre-development value | Prepare the habitat baseline, metric information and required supporting material. | The application may be invalid if national BNG information is missing where required. |
| Local biodiversity statement | Major applications may need extra information beyond national minimum requirements. | Cornwall applies local validation requirements for a BNG statement in some situations. |
| Wrong exemption claim | Explain why an exemption applies, instead of ticking a box with no reasoning. | Cornwall Council warns that unclear exemptions can trigger requests for justification or invalidation. |
Trees, TPOs, Conservation Areas and Historic Cornwall
Cornwall has many listed buildings, conservation areas, historic villages, harbours, mining landscapes, old stone boundaries and protected trees. These can affect small projects as much as large development.
Tree application PDF checklist
For trees subject to a Tree Preservation Order or trees in a conservation area, the official tree validation document asks for a completed form, detailed description of proposed works and a sketch plan showing each tree and its relationship with buildings.
- For crown thinning, state the percentage.
- For crown lift or raise, specify height or branches.
- For crown reduction, specify remaining height and spread in metres.
- If the tree is unsafe or causing structural damage, provide an appropriate report.
- Photographs with proposed pruning marked can be useful.
Heritage and conservation checks
Cornwall Council describes conservation areas as places of special architectural or historic interest where character or appearance should be preserved or enhanced. Listed buildings and their settings may need a heritage statement or heritage impact assessment.
- Check listed status before replacing windows, roofs, doors or materials.
- Check conservation area rules before demolition or visible external changes.
- Explain materials, scale, setting and street-scene impact.
- Do not assume like-for-like modern replacement is automatically acceptable.
Cornwall-Specific Planning Checks Generic Guides Often Miss
A project in Cornwall can be delayed because the form is correct but the site context has not been understood. Run these local checks early.
Coast, cliffs and stability
Cliff-top, estuary, harbour and steep-slope sites may need careful attention to land stability, erosion, access, visual impact and drainage.
Mining legacy
Former mining areas can trigger land stability questions. If in doubt, check mapping and consider whether specialist evidence is needed before submission.
Rural buildings and Class Q
Barn conversions, agricultural buildings and rural business uses often need precise drawings, access details, structural evidence and prior-approval checks.
Public rights of way
If a footpath, bridleway or public route is affected or influenced, show it on the site or block plan and explain any access or safety impact.
Drainage and flood risk
Surface water, foul drainage, non-mains drainage, SuDS and critical drainage areas can require supporting information even for modest schemes.
Neighbourhood plans
Check whether the parish or town has a made neighbourhood plan. It may include settlement boundaries, design rules, landscape policies or local housing criteria.
Decisions, Conditions and What Happens Next
A planning decision is not simply “yes” or “no”. Conditions, approved plan numbers, discharge requirements and appeal rights matter after the decision appears.
If permission is approved
Read the decision notice and approved plan list carefully. Some conditions must be approved before work starts. Building something different from the approved drawings can create enforcement risk.
If conditions need discharge
Cornwall Council explains that pre-commencement conditions must be formally discharged before construction or development starts. If you submit each condition separately, separate fee events may apply.
If permission is refused
Read the refusal reasons, not just the outcome. You may need amended plans, pre-application advice, a fresh application or an appeal as the applicant.
If the application was withdrawn or returned
Cornwall Council advises that if submitting after a withdrawal, refusal, approval or returned application, do not use the amend function on the Planning Portal. Create a new application with a new reference.
Official Cornwall Planning Links After You Know Your Task
Use these official links only for the action you need. Keep your application reference, address, postcode, plan files or draft comment ready before opening the live service.
Independent guide note: this page explains the process in plain English. Always use Cornwall Council, GOV.UK and the Planning Portal for live application records, legal requirements, fees, forms and deadlines.
FAQs About Cornwall Planning Applications
Where do I search Cornwall planning applications?
Use Cornwall Council’s online planning register. Search by reference number, address, parish, postcode area, road name or keyword, then open the documents tab for drawings, reports, comments and decisions.
Can I comment on Cornwall Council planning applications by email?
No. Cornwall Council says public comments submitted by email are no longer accepted from 1 April 2022. The online planning register is the quickest route for comments, and postal comments can take longer to process.
What should I write in a planning objection?
Use the application reference, explain your relationship to the site and focus on planning matters such as design, access, privacy, highway safety, drainage, trees, biodiversity, heritage, public rights of way or policy conflict.
Can neighbours appeal if Cornwall Council approves an application?
Third parties normally do not have the right to appeal a planning decision. Cornwall Council states that the applicant is the person with the right to appeal, so neighbours should submit clear planning comments during the consultation stage.
How long does Cornwall planning validation take?
Cornwall Council publishes an indicative current average validation time on its “Make a planning application” page. Validation time can change, so always check the live council page before relying on a number.
Why is a Cornwall planning application invalid?
Common reasons include missing CIL form, wrong fee, incorrect location plan, missing north point or scale, incorrect red-line boundary, PROW not shown, missing drainage, flood risk, contaminated land, heritage or bat survey information.
Is the Planning Portal run by Cornwall Council?
No. Cornwall Council says the Planning Portal is used to submit planning applications electronically, but it is not run by Cornwall Council. For technical Planning Portal issues, use Planning Portal support.
Do I need planning permission for a home extension in Cornwall?
Some home extensions may be permitted development, but the answer depends on size, location, previous permissions, Article 4 directions, conservation areas, listed building status, design and other site constraints.
What is Biodiversity Net Gain in Cornwall planning?
BNG is a requirement for development to deliver a measurable biodiversity improvement. Cornwall Council explains that developers must deliver a 10% biodiversity net gain, and some applications need BNG information at validation stage.
What should I check after planning permission is approved?
Read the decision notice, approved plan numbers, commencement deadline and every condition. Some conditions must be discharged before work starts, and failing to discharge conditions can create enforcement and sale problems.