15 Holland Park Avenue, London, W11 3QU

What you could build

Permitted development rights generally don't apply to flats and maisonettes — most changes need freeholder consent and/or planning permission.

Indicative only, based on property type. Permitted development rights are removed or restricted in conservation areas, by Article 4 directions, for listed buildings, and where rights have already been used. Always confirm with your local planning authority before starting any work.

Renovation ROI Estimates

Showing benchmark estimates (AI analysis unavailable).

• Bathroom

  Low confidence

  Cost range:£18,000 – £36,000

  Est. value uplift:+4%

• Extension

  Low confidence

  Cost range:£60,000 – £105,000

  Est. value uplift:+12.5%

• Full Refurb

  Low confidence

  Cost range:£36,000 – £60,000

  Est. value uplift:+11.5%

• Kitchen

  Low confidence

  Cost range:£24,000 – £45,000

  Est. value uplift:+7.5%

• Loft Conversion

  Low confidence

  Cost range:£45,000 – £75,000

  Est. value uplift:+22.5%