The time it takes to obtain planning permission is one of the key variables in any building or development project, and understanding the statutory timescales, the factors that cause delays, and what happens if the decision is not made on time helps applicants plan their projects realistically.

Statutory Decision Periods

Local planning authorities in England are required to determine planning applications within specified periods. Householder applications, which cover extensions, loft conversions, outbuildings, and similar works to existing dwellings, have an eight-week determination period. Minor applications, covering small-scale development such as a single new dwelling, also have an eight-week period. Major applications, covering development of ten or more dwellings, commercial development above certain thresholds, and other significant projects, have a thirteen-week determination period.

These are statutory targets rather than guaranteed deadlines. Local planning authorities with high workloads, staff shortages, or complex caseloads frequently exceed these periods. DLUHC publishes performance statistics showing what percentage of applications each authority decides within the statutory period; these vary considerably.

Pre-Application Discussions

Many planning authorities offer pre-application discussion services where a planning officer reviews a proposal informally and provides feedback before a formal application is submitted. This adds time upfront but can significantly improve the chances of approval and reduce the risk of delays caused by requests for additional information during the formal process. Pre-application discussions typically take four to eight weeks.

What Causes Delays

Applications that attract objections from neighbours or statutory consultees require more officer time to assess. Applications that raise issues requiring specialist input from the highways authority, environmental health, or historic environment advisers can be delayed while those bodies provide their responses. Applications that require additional information from the applicant, such as transport assessments, heritage impact assessments, or ecological surveys, are paused while this information is provided and reviewed.

The Appeal Process

If a planning application is refused, the applicant can appeal to the Planning Inspectorate. Written representations appeals, the most common form for householder applications, are typically determined within 22 weeks of the appeal being accepted. Hearings and public inquiries take longer. The total time from submitting the original application to receiving an appeal decision can therefore be 12 to 18 months in contested cases.

Summary

Householder planning applications have an eight-week statutory determination period; major applications have thirteen weeks. In practice, many applications take longer due to officer workload and the need for specialist consultee responses. Pre-application discussions add upfront time but improve approval prospects. Appeals add substantially to the total timeline, typically adding six months or more. Planning your project with a realistic assessment of the likely approval timeline avoids programme pressure if decisions take longer than the statutory minimum.