One of the most common questions we hear from homeowners across Chesterfield, Matlock, and the Peak District is: "Do I actually need planning permission for this?"
The answer depends on the type of work, the size of your property, and where you live. This guide breaks it down so you can move forward with confidence.
Whether you're considering a rear or side extension, a loft conversion, or a garage conversion — here's what you need to know.
What Is Permitted Development?
Permitted Development (PD) rights allow homeowners to carry out certain building works without a full planning application. These rights are granted by the government and apply to most houses — but not all.
Your PD rights may be restricted if:
- • Your home is in a conservation area (common in Peak District & parts of Chesterfield)
- • Your property is a listed building
- • PD rights were removed via an Article 4 direction
- • You live in a flat or maisonette
When You Typically DON'T Need Planning Permission
Single-Storey Rear Extensions
4m
Max depth (8m detached)
3m
Max eaves height
50%
Max garden coverage
Our team regularly delivers property extensions across Chesterfield under PD — saving homeowners weeks of waiting time.
Loft Conversions
40m³
Terraced houses
50m³
Detached / semi-detached
Most loft conversions in Chesterfield and Dronfield fall within PD, but dormer additions on the front elevation always require planning permission.
Garage Conversions
Converting an existing integral or attached garage into living space is usually permitted development — provided you're not significantly altering the external appearance. One of the most cost-effective ways to add a bedroom or home office.
Outbuildings & Garden Rooms
2.5m
Max eaves height
50%
Max curtilage coverage
2.5m
Height at boundary (<2m)
When You WILL Need Planning Permission
- 1Two-storey extensions (side or rear)
- 2Any extension forward of the principal elevation
- 3Work on listed buildings (also requires Listed Building Consent)
- 4Significant alterations in conservation areas
- 5New-build homes or barn conversions — always require full planning
- 6Commercial-to-residential conversions (prior approval may apply under Class MA)
Building Regulations vs Planning Permission
These are two separate things. Even if you don't need planning permission, almost all structural work requires Building Regulations approval. This covers:
💡 At JBW Construction, we handle building regulation applications as part of every project — so you never need to chase paperwork.
Special Considerations for Derbyshire
Living in areas like the Peak District National Park brings additional planning restrictions. The National Park Authority acts as the planning authority and applies stricter controls to protect the landscape character.
Check whether your property falls within a conservation area or national park boundary before assuming PD rights apply.
How to Check If You Need Permission
Check the Planning Portal
The government's interactive tool gives a quick indication.
Contact your local planning authority
Chesterfield Borough Council or Derbyshire Dales District Council.
Apply for a Lawful Development Certificate
Written confirmation that your project is PD. Useful when selling your home later.
Ask your builder
An experienced local builder will know from the first site visit whether planning permission is likely needed.
Why This Matters Before You Start
Building without the correct permissions can result in an enforcement notice, requiring you to undo the work at your own cost. It can also cause serious problems when selling your property.
That's why every project we take on starts with a free site survey where we assess planning requirements before any work begins.