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Residential design · England

Part L and large glazing design calculations

Part L and large glazing calculations for residential extension design in England, where required by the project scope.

Glazed rear extension and loft conversion design visual

What the service can include

  • Large-glazing design checks
  • Fabric and opening-area coordination
  • Energy-efficiency calculations where applicable
  • Design feedback on glazing strategy
  • Coordination with Building Regulations drawings
  • Clear identification of assumptions and information required

100% online design workflow

The service is intended for suitable small residential projects where the client can provide reliable existing plans, photographs and a written brief. Three written design review rounds are included in the standard design workflow.

Professional status: Archi Project provides architectural design services. No architect is appointed as part of the standard service.

Frequently asked questions

Is Archi Project an architect practice?

No. Archi Project provides architectural design services, but no architect is appointed as part of the standard service.

Do I need existing plans?

Yes. The standard online service relies on reliable pre-existing plans, useful dimensions, photographs and a written brief.

Does planning approval come with the service?

No. Planning permission and Building Regulations approval are decisions of the relevant authorities and cannot be guaranteed.

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