SAP Calculations for Conversions

Barn conversions, office-to-residential, flat splits — we handle the SAP calculations and EPCs for newly converted dwellings, and advise on bringing existing fabric up to standard.

Conversions are different

Creating a dwelling from an existing building falls under the Building Regulations requirements for work to existing buildings (formerly Part L1B). Unlike a new build, you’re working with existing walls, floors and roofs — so compliance is as much about sensible upgrades as new specification.

We assess both the new and existing elements: how existing fabric can realistically be upgraded, and how new heating, glazing and insulation should be incorporated to get the calculation through.

Two stages

Design — we check the proposed design meets the requirements before work starts, from your existing and proposed plans plus specification. No site visit or survey needed.

As-built — on completion we issue the final SAP reports and the EPC for each new dwelling.

There are several routes to demonstrating compliance for a conversion, and the best one depends on the building. We work through the options with you and stay on call throughout the build.

Converting and extending at the same time? See SAP for extensions. Planning conditions asking for renewables? See Energy Statements.

Converting something into a dwelling?

Conversions rarely fit the standard boxes. Send the drawings and whatever Building Control have asked for, and we'll tell you which calculations actually apply before you pay for any of them.

Get a conversion quote or call 01202 623236