Brentwood: side extension that stayed within PD limits

Case study image

The brief

Create a wider kitchen and utility area without a full planning application.

PD question answered

Can a side extension be done under permitted development?
Yes, if it is single-storey, does not exceed half the width of the original house, and meets height and boundary limits.

Constraints

Tight side access and neighbour sensitivity
Need to keep width within PD thresholds
Protect existing drainage runs

What we did

Measured the original house accurately to set the PD width cap
Kept height modest and roof form simple
Prepared a clean plan set to evidence compliance

Outcome

A compliant side extension with no planning delay and a smoother build.