What Is Planning Permission?
Planning permission is formal consent from your local authority to carry out building work or a change of use. It applies to projects that go beyond the limits of permitted development, or are located in sensitive areas.
You’ll need planning permission for:
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Larger rear, side or double-storey extensions
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Projects that alter the appearance or scale of your home significantly
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Homes in conservation areas or Areas of Outstanding Natural Beauty (AONB)
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Listed buildings
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New dwellings or replacement homes
To apply, your architect will submit a package of drawings, forms, and a design statement. The council then assesses the application against local and national policy — usually taking 8+ weeks for a decision.
✅ Planning permission offers more design flexibility, but takes time and involves more scrutiny.
What Are Permitted Development (PD) Rights?
Permitted development rights are a national set of planning rules that allow homeowners to make certain changes to their property without needing full planning permission.
You might be able to use PD for:
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Modest single-storey rear or side extensions
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Loft conversions with rear dormers
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Porches and outbuildings (within set size and placement limits)
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Internal alterations
However, PD comes with strict limits on height, materials, proximity to boundaries, and previous extensions. Not all properties qualify — flats, maisonettes, listed buildings and homes in designated areas may be excluded.
✅ Faster and more streamlined — but less design flexibility.
What About a Lawful Development Certificate (LDC)?
Even if your project qualifies under permitted development, we always recommend applying for a Lawful Development Certificate. This is a formal document from the council confirming that your proposal is legal under PD rules.
It provides:
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Peace of mind
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Proof of compliance for future buyers or lenders
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A record in case council policies change later
We regularly submit LDC applications as part of our early-stage services.
Planning vs. PD: Which Is Better?
There’s no one-size-fits-all answer. It depends on:
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Your property type and planning history
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Whether you live in a conservation area
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The scope of your ambitions
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Whether you want to push the design beyond PD limits
At Studio 40, we explore both routes with you early on. In some cases, we start with PD to keep things simple. In others, we opt for a full planning application to achieve more light, space, or architectural clarity.
Planning vs. PD: A Quick Comparison
| Planning Permission | Permitted Development | |
|---|---|---|
| Application needed? | Yes | Not always (but LDC is recommended) |
| Decision time | ~8+ weeks | ~1–2 weeks (for LDC) |
| Design flexibility | High — bespoke design options | Limited by national rules |
| Neighbour consultation | Yes | No |
| Best for | Larger or design-led projects | Simple extensions and upgrades |
Our Role at Studio 40
We handle all planning and permitted development submissions as part of our service. We’ll:
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Confirm whether your project qualifies for PD or needs permission
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Prepare drawings, statements and forms
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Liaise with Chelmsford City Council (or your local authority)
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Support you through any conditions or amendments
Our goal is always to find the clearest, calmest route to approval — while protecting your design intent.
Ready to Explore Your Options?
We’d love to help. Whether you're in Stock, Danbury, Chelmsford or the surrounding areas, Studio 40 can guide you through your next project with confidence.
📩 Contact us to get started.