After planning permission is approved, the applicant must build and use the site in line with the decision notice, approved drawings and conditions. Approval does not always mean work can start the next day. Some permissions require extra details or other consents before development begins.
The decision notice is the document that turns the council's decision into practical controls. It normally lists the approved plans, conditions, time limit and any informatives. The officer report explains the reasoning, but the notice and approved drawings are what you use to check compliance.
The GOV.UK guidance on planning conditions is important after approval because conditions often control the details neighbours care about most: materials, windows, landscaping, drainage, construction management, opening hours, parking, noise, ecology, trees and occupation.
Step One: Read The Decision Notice
Do not stop at "approved". Read every condition.
Some conditions are standard, such as the time limit for starting development and the requirement to build in accordance with approved plans. Others are site-specific and can make the difference between an acceptable and unacceptable scheme.
Split conditions into groups:
| Condition timing | What it means |
|---|---|
| Before commencement | Must usually be dealt with before development starts |
| Before above-ground works | Details may be needed before visible construction progresses |
| During construction | Controls hours, tree protection, traffic, dust or method of works |
| Before occupation | Must be satisfied before the building is used or occupied |
| Ongoing | Controls use, hours, parking, glazing, landscaping or noise long term |
If a condition says "prior to commencement", starting work before that condition is discharged can create enforcement risk. But wording varies, and some works may be treated differently depending on the condition and case law. If the stakes are high, get professional advice.
Step Two: Check The Approved Drawings
The approved drawing list matters. It may include revision letters that changed during the application. Neighbours often remember the first plan they saw, but the permission may approve a later plan with different windows, roof shape, materials or layout.
Save the drawings locally. Council portals sometimes reorganise or rename documents. If a dispute arises later, you want the exact plan numbers and revision references.
For a house extension, check height, depth, roof form, side windows, boundary distance and materials. For a new commercial use, check extraction, opening hours, deliveries, waste and noise controls. For a larger housing site, check access, landscaping, drainage, phasing and affordable housing triggers.
Step Three: Work Out What Else Is Needed
Planning permission is not the same as building regulations approval. Building control still deals with structure, fire safety, insulation, drainage, electrical safety and other technical matters.
Other permissions may also be needed: party wall notices, highways licences, tree works consent, listed building consent, environmental permits, drainage approvals, Section 106 obligations, Community Infrastructure Levy paperwork or landlord/freeholder consent.
The Planning Portal discharge of conditions guidance explains the process for submitting details required by planning conditions. These applications can be important because they reveal the details that were deferred at approval stage.
What Neighbours Should Watch
After approval, your strongest role is monitoring compliance. Keep an eye on discharge-of-condition applications, non-material amendments, Section 73 variation applications and visible site works.
If a condition requires obscure glazing, check whether the window matches. If a landscaping condition protects a tree, photograph the tree before works begin. If construction hours are controlled, keep a dated log of out-of-hours activity. If the approved drawing shows a lower boundary wall than the one being built, compare the drawing reference with photographs.
Use PlanWatch planning search to spot follow-up applications around the postcode, then use the council portal to read the formal documents.
What Applicants Should Avoid
Do not start until you know which conditions are pre-commencement. A small administrative miss can become a serious enforcement issue if the condition protected trees, drainage, contamination or archaeology.
Do not substitute materials, windows or roof details casually. Even changes that look minor on site may need written approval.
Do not assume the builder has read the permission. Give contractors the decision notice and approved drawings before work starts.
Do not leave Community Infrastructure Levy forms or Section 106 triggers until the last minute. These can have financial consequences.
Later Changes To Approved Plans
Approved plans can sometimes be changed, but the route depends on the scale of change. A very small change may be handled as a non-material amendment. A condition change or minor material amendment may require a Section 73 application. A larger change may need a fresh planning application.
The GOV.UK flexible options guidance explains the difference between these amendment routes. It is worth checking because the wrong route can leave the applicant without the permission they think they have.
Buyer Due Diligence
If you are buying a property with recent planning permission, ask whether it has been implemented. A permission may still be capable of being built, partly implemented or already expired. The start deadline and evidence of commencement matter.
If you are buying next to an approved scheme, read the conditions before assuming the worst or the best. Conditions may limit windows, hours, use, parking or materials. On the other hand, a weak condition set may mean more practical impact than the headline approval suggests.
Official Sources
- GOV.UK planning conditions guidance
- Planning Portal discharge of conditions guidance
- Planning Portal decision-making process
- GOV.UK flexible options for planning permissions
Related PlanWatch Guides
- Planning Application Decision Notice Explained
- Discharge Of Planning Conditions
- Planning Enforcement When Rules Are Broken
Frequently Asked Questions
Can work start immediately after planning permission?
Not always. Pre-commencement conditions, legal agreements, building regulations and other consents may need to be dealt with first.
How long does planning permission last?
Many permissions require development to begin within a set period, often three years, but the decision notice controls the exact deadline.
Can approved plans be changed later?
Yes, but changes may need a non-material amendment, Section 73 application or fresh planning permission depending on their scale.
What should neighbours monitor after approval?
Monitor approved drawings, conditions, discharge applications, construction hours, later amendments and visible departures from the permission.
The Useful Habit
Treat approval as the start of a document trail. Save the notice, save the plans, track the conditions and compare the finished work with what was actually approved.
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Search Your Postcode FreeDisclaimer: PlanWatch provides general information about UK planning processes. This content is not legal advice. Planning law is complex and varies by local authority. Consult a qualified planning consultant or solicitor for advice specific to your situation.