Conservation-Sensitive Extensions

Extension Engineers in Kensington & Chelsea

Extending a property in Kensington and Chelsea means working within some of London's strictest conservation area policies. We design rear and side extensions that maximise space while meeting RBKC's exacting requirements for materials, proportions, and impact on neighbouring properties.

Local Challenges

Home Extensions in Kensington & Chelsea

Over 70% of RBKC falls within conservation areas, where permitted development rights are often restricted. Extensions must use materials sympathetic to the existing building and demonstrate minimal impact on the streetscape and neighbouring amenity. Rear extensions on terraced properties require careful party wall consideration.

What You Get

  • Structural design for rear and side extensions
  • Foundation design for period property ground conditions
  • Steel beam specifications for open-plan connections
  • Party wall structural surveys
  • Conservation area compliance documentation
  • Building Regulations structural calculations

Property Types

Home Extensions by Property Type in Kensington & Chelsea

Permissions & Approvals

What Approvals Do You Need?

Planning Permission

Required in most of RBKC due to conservation area restrictions on PD rights. Applications assessed on materials, proportions, and neighbour impact.

Building Regulations

Structural calculations, foundation design, thermal performance, and drainage must all comply. Building Control inspections at key stages.

Party Wall Act

Extensions within 3m of a neighbour's property or 6m with deep foundations trigger Party Wall Act notices.

Timeline

How Long Does It Take?

Design: 2–4 weeks. Planning: 8–12 weeks. Construction: 10–16 weeks.

Tailored Pricing

Request a Fee Proposal

Every project is unique. Share your drawings with us and receive a detailed fee proposal tailored to your home extensions project in Kensington & Chelsea.

Recent Project

Chelsea, Kensington & Chelsea

Designed a glazed rear extension to a Chelsea mews house within a conservation area, using a minimal steel frame that achieved full-width opening to the garden while meeting RBKC's stringent design requirements.

Common Questions

Home Extensions in Kensington & Chelsea — FAQ

Ready to Engineer Your Project?

Get a bespoke consultation with a structural engineer who specialises in home extensions in Kensington & Chelsea.