Introduction

Most renovation plans begin with what you want to change.

Before deciding how to change it, you may also need to understand what is already there.

Surveys and investigations can reveal the condition, dimensions and structure of the property.

A measured survey

A measured survey records the dimensions and layout of the existing building.

It gives the designer an accurate base for drawings and helps reduce mistakes caused by relying on old plans or estate-agent floorplans.

A building survey

A building survey looks at the condition of the property.

It may identify damp, roof defects, movement, timber problems or areas that need further investigation.

A structural inspection

If you plan to remove walls, alter the roof or make significant structural changes, a structural engineer may need to inspect the property.

They can assess the existing structure and design the support required.

Other investigations

Extensions sometimes need information about drains, ground conditions or nearby trees.

Older properties may also need specialist advice relating to asbestos, damp, timber or heritage.

Who decides what is needed?

Your architect, designer, surveyor or structural engineer should help identify the information required.

Ask why a survey is being recommended and what decision it will help you make.

Final thoughts

A survey cannot reveal every hidden issue, but it can prevent important decisions being based on guesswork.

Understanding the property early usually leads to better drawings and more realistic budgets.