Planning Permission, planning drawings and building regulations

Boring, daunting or exciting?

Likely a mix

Don’t worry though, just be excited!

We’re here to inform, advise and help

Planning permission isn’t a dirty word

Not when you know what you’re doing anyway.

When it comes to planning, drawing and building your new extension, house, loft or garage conversion

It’s kind of what we do.

So without further a do, below are some key considerations when it comes to planning permission

House Extensions – Do I need planning permission?

It’s true

you can extend or modify your house without always requiring planning permission, although they are subject to prior notification or the neighbourhood consultation scheme


Keep these pointers in mind:

  1. The proposed dimensions of the extension – 3m x 6m for attached houses and 4m x 8m for detached houses
  2. The position relative to the house – no front or side elevation if a highway is in front
  3. Proximity to your boundaries
  4. Mass or over development rules – If more than half the area of land around the original house is covered by additional builds.
  5. You cant go crazy either with fancy pants designs, if it’s not in keeping with the original build, full planning is required.

Design Work Studios have vast experience in designing extensions in Reading, extensions in Wokingham, Surrey and Berkshire.

Extensions Reading


You will need to planning permission if the porch:

  1. A ground area of more than 3 square metres (measured externally)
  2. Higher than 3m above ground level
  3. Less than 2m away from the boundary of a house with a highway

Loft Conversions

Again, not always needed.

If you meet the requirements

A loft conversion is considered to be permitted development


  1. 40 cubic metres additional roof space for terraced houses
  2. 50 cubic metres additional roof space for detached and semi-detached houses*
  3. No extension beyond the existing roof to the front of the house
  4. No extension to be higher than the highest part of the roof
  5. Materials to be similar in appearance to the existing house
  6. No balconies
  7. Side-facing windows to be obscure-glazed; any opening to be 1.7m above the floor
  8. Roof extensions not to be permitted development in designated areas
  9. Roof extensions, apart from hip to gable ones, to be set back, as far as practicable, at least 20cm from the original eaves
  10. The roof enlargement cannot overhang the outer face of the wall of the original house.

Design Work Studios have vast experience in designing loft conversions in Reading, loft conversions in Wokingham, Surrey and Berkshire.

Loft conversion Reading

Garage Conversions

As long as you’re not enlarging the building and the work is internal, planning permission isn’t normally required.

However, some rights to convert are removed in certain areas and developments, best to ask your local council just to be sure.

Design Work Studios have vast experience in designing garage conversions in Reading, garage conversions in Wokingham, Surrey and Berkshire.

Garage conversion Reading

Building Regulations

Building Regulations generally apply if you want to build an extension or conversion to your home.

However, a porch or conservatory built at ground level and with a floor area of no more than 30m2 is normally exempt.

There are some provisions on this when it comes to glazing and electrical installations.

For extra guidance on this subject, check out

Extensions, porches, loft conversions and garage conversions

We offer free consultations and advice on how best to help you with your project, e-mail us at or fill in our contact form