Navigating Planning Permission: Your Guide to Stress-Free Home Improvements in London

4/15/20251 min read

a group of buildings
a group of buildings

Simplify compliance and avoid common pitfalls with this step-by-step roadmap for London homeowners

Key Takeaways

  • Permitted Development Rights cover many minor projects but vary by borough and property type

  • Critical Exceptions: Conservation areas, listed buildings, and basement excavations often require full permissions

  • Costs: Average application fees range £200-£500, with complex cases exceeding £1,000

  • Timeline: Most decisions take 8-13 weeks, but pre-application advice can prevent delays

Do You Need Planning Permission?

Permitted Development Rights

Projects exempt from full planning permission under government guidelines:

  • Single-storey rear extensions (max 4m depth for terraced/semi-detached; 8m for detached)

  • Loft conversions without altering roof height/volume beyond limits

  • Internal remodels (non-structural changes like kitchen/bathroom updates)

⚠️ Exceptions:

  • Conservation Areas: Restrictions on exterior changes

  • Listed Buildings: Consent required for internal/external alterations

  • Article 4 Directions: Local restrictions removing permitted rights

Always verify with your borough’s planning portal or use the Planning Portal’s Interactive Guide2.

London-Specific Considerations

Borough Variations

Common Pitfalls

  • Overlooking Party Wall Agreements: Required for shared walls/excavations near boundaries

  • Ignoring Pre-App Consultations: £100-300 fee saves months of revisions

  • Misjudging Timelines: Book inspections 2-3 weeks in advance during peak seasons

Step-by-Step Application Process

  1. Pre-Application Research

  2. Document Preparation

    • Required:

      • Scaled drawings (1:50 or 1:100)

      • Design & Access Statement (for major projects)

      • Tree surveys (if applicable)

  3. Submission

  4. Post-Submission

    • Track status weekly via planning reference number

    • Respond to queries within 5 working days

Pro Tips for Stress-Free Compliance

  • Hire Specialists: Architects familiar with London Planning Guidance reduce refusal risks

  • Budget for Contingencies: Allocate 10-15% for unexpected requirements4

  • Digital Tools: Apps like PlanRadar track progress and document compliance

Need Professional Support?


NFA Architecture specializes in navigating London’s complex planning landscape, offering:

  • Free Feasibility Assessments for extensions/loft conversions

  • Full Application Management from design to approval

  • Listed Building Consent expertise

Further Resources