Maven Design & Build

Not sure if your project needs planning permission?

We'll tell you if your project can be done under Permitted Development — and help you move forward the right way.

What this means

  • Permitted Development (PD) is a set of national rules. For many houses, certain extensions and changes can go ahead without a full planning application — if you stay inside the limits.
  • Why it matters: the wrong route means wasted fees, redesigns, or enforcement later. Getting it right first saves time and money.
  • Common mistakes: measuring from the wrong baseline, ignoring Article 4 or conservation rules, or confusing PD with building regulations.

Why this matters

  • If PD does not apply and you build anyway, you risk enforcement and having to alter or remove work.
  • Wrong assumptions lead to refused applications, delays, and extra design costs.
  • Buyers and lenders may ask for proof — a muddled route can slow a sale.

How we help

  • We look at your property and brief in context — not generic templates.
  • We identify the lawful route: PD, an LDC, prior approval, or full planning.
  • We set out clear next steps and realistic risks.
  • If you want to proceed, we can deliver design, approvals, and construction under one team.

Quick next step

Choose what matches you — you can still change your mind later.

Proof — real PD projects

Examples from our project library (before / after). Full case details on the main site.

Dartford: extension rescue and compliance reset — beforeBefore
Dartford: extension rescue and compliance reset — afterAfter

Dartford: extension rescue and compliance reset

Rescued rear extension + compliance reset. PD route. 14 weeks.

View project →
Rear extension in Sevenoaks (Permitted Development) — beforeBefore
Rear extension in Sevenoaks (Permitted Development) — afterAfter

Rear extension in Sevenoaks (Permitted Development)

New kitchen-diner + utility. PD route. 14 weeks.

View project →
Bungalow loft in Chelmsford (planning route) — beforeBefore
Bungalow loft in Chelmsford (planning route) — afterAfter

Bungalow loft in Chelmsford (planning route)

Bungalow loft conversion. Planning route. 18 weeks.

View project →

Get your planning route checked

Leave your details — we'll come back with a sensible view on route and next steps.

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