Frequently Asked Questions

Answers on planning, party wall, building control, timelines and costs. Cannot find yours? Ask an engineer.

FAQs

Planning permission

Planning rules depend on your house and your council.

Many single storey rear extensions are permitted development, but size limits and conservation areas apply.

Confirmation from the council that a project is permitted development. We recommend one.

FAQs

Most terraced and semi-detached projects involve the Party Wall Act.

When building on or near a shared boundary or digging foundations close to a neighbour.

Usually one or two months depending on the work.

FAQs

Building regulations apply to almost every structural project.

A building control inspector checks key stages and issues a completion certificate.

Yes, we book inspections at each stage.

FAQs

Design and approvals often take longer than the build.

Time on site depends on size and complexity. You get a written programme with your quote.

Once design and approvals are in place. We confirm dates when we quote.

FAQs

We give honest, itemised quotes.

After a survey, with an itemised quote.

Size, ground conditions, structure, drainage, glazing and finishes.

Free, no-obligation quote

Send a few details and one of our engineers will call you back to arrange a survey. Prefer to talk now? Call 020 3857 3805.