Planning Portal Explained: How to Find Planning Applications and Check Constraints

What the Planning Portal Is

The Planning Portal (planningportal.co.uk) is a joint venture between the Ministry of Housing, Communities and Local Government and a private company. It serves two distinct functions: it is the national digital platform through which planning applications are submitted to local planning authorities (LPAs), and it is an information resource for homeowners, buyers, and professionals wanting to understand planning rules.

It is important to understand that the Planning Portal is not a single database of all planning decisions. Planning decisions are made by individual local planning authorities and held in their own systems. The Planning Portal provides a gateway to these systems and aggregates some data, but for comprehensive planning history on a specific address you will often need to go directly to the relevant local authority's planning search tool.

Searching for Planning Applications

From the Planning Portal homepage, the Find and track a planning application tool allows searches by postcode or address. This will typically return:

• Applications submitted to the relevant LPA in recent years
• Application references, descriptions, and submitted documents
• Decision notices (approved, refused, or withdrawn)
• Appeal records where a refused application was challenged

The depth of historical data varies significantly between local authorities. Some LPAs have digitised records going back to the 1990s; others may only have reliable online records from 2005 onwards. For older planning history, a formal Local Authority Search (ordered by your solicitor as part of conveyancing) or a direct inquiry to the LPA planning department may be necessary.

What to Look For on a Property You're Buying

When checking planning history for a property you're considering purchasing, look for:

**Enforcement notices**: If a previous owner built an extension, conversion, or outbuilding without consent, there may be an outstanding enforcement notice. Time-limited immunity periods (four years for operational development, ten years for change of use) mean that old unauthorised works may no longer be actionable, but recent enforcement action is a serious concern.

**Conditions attached to permissions**: Planning permissions often come with conditions — restricting permitted development rights, requiring certain materials, limiting hours of use. These conditions run with the land and bind future owners.

**Refused applications**: A history of refused applications on or near the property can indicate constraints that limit future development potential.

**Nearby applications**: Large nearby developments — new housing estates, commercial developments, major infrastructure — will be visible in the planning register and may affect the character of the area significantly.

Checking Permitted Development Rights

The Planning Portal's Interactive House and Interactive Terrace tools give a visual guide to what changes can typically be made under permitted development (PD) rights without a planning application. This includes rear extensions, loft conversions, outbuildings, and some solar panel installations.

However, PD rights are subject to important caveats:

• They are removed entirely for listed buildings
• They are restricted or removed for properties in conservation areas, National Parks, Areas of Outstanding Natural Beauty, and World Heritage Sites
• Article 4 Directions issued by local authorities can remove PD rights in specific areas
• The property must not have used up its PD allowance through previous works

The Planning Portal tool gives a general guide, not a definitive answer. For certainty, a Lawful Development Certificate from the LPA provides formal confirmation that proposed works are lawful.

Map-Based Constraint Checking

The Planning Portal's map tool overlays various planning constraint layers, including:

• National Parks and Areas of Outstanding Natural Beauty
• Scheduled Monuments
• Registered Parks and Gardens
• Green Belt land
• Flood zones (Environment Agency data)

These layers help identify statutory constraints that affect development potential before investing time in a detailed planning assessment.

Local Authority Planning Search Tools

For comprehensive planning history, go directly to the relevant local authority. All LPAs are required to maintain a public planning register. The Planning Portal's Find your local planning authority tool gives the direct link to each authority's search system.

Common platforms used by LPAs include:

• **IDOX/Uniform**: Used by a large proportion of English LPAs, with a consistent interface
• **Northgate/iApply**: Used by some London boroughs and metropolitan authorities
• **Swift**: Used by a number of county and district councils

Limitations to Be Aware Of

The Planning Portal does not show:

• Building regulations applications or completion certificates (these are held separately by building control)
• Listed building consent applications (in most authorities these require a separate search)
• Tree Preservation Orders (held by the local authority tree officer)
• Highway adoption status for roads serving the property

Your conveyancing solicitor's Local Authority Search will cover most of these gaps and should be considered essential for any property purchase.