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Energy Compliance Service

SAP Calculations for Extensions & Loft Conversions in Hampshire & Surrey

SAP (Standard Assessment Procedure) is a method for assessing a home's energy performance. Whether a calculation is required depends on the project and applicable requirements; the building control body determines what information is needed.

A separate service may be available through an accredited assessor. The assessor prepares the calculation; any other documents, submissions or work must be confirmed in the agreed scope.

Covering Hampshire, Surrey, Wiltshire & Berkshire · Complimentary consultation, no obligation

Separate Specialist Service

£550 + VAT

The listed service fee is separate from the standard design packages. Confirm the required deliverables and any additional costs before instruction.

  • Design-stage SAP calculation report
  • Predicted Energy Assessment (PEA)
  • Any later EPC must be expressly included in the agreed scope
  • Calculation documents listed in the agreed scope
  • Assessment carried out by an accredited assessor
  • Separate from the standard design package scope

Timing confirmed separately

The accredited assessor sets the assessment schedule.

When Do You Need a SAP Calculation?

Whether an energy calculation is required depends on the project and is determined by the relevant building control body.

Rear & side extensions

A calculation may be required depending on the design and applicable Building Regulations.

Loft conversions

Requirements depend on the proposed work and the building control body's assessment.

Garage conversions

A separate energy assessment may be required depending on the conversion and applicable standards.

Glazed extensions

The building control body determines whether additional energy information is required.

How It Works

Assessment scope, required information and timing are confirmed separately with the accredited assessor.

01

Share your project details

Provide the project information requested for an initial scope discussion. Additional documents may be required by the assessor.

02

Assessment by an Accredited Assessor

The accredited assessor determines the required inputs and carries out the calculation. Scope and any additional fees are confirmed before instruction.

03

Documents delivered

The assessor provides the report and any other documents listed in the agreed scope.

04

Further Assessments

Discuss an On-Construction EPC with your accredited assessor.

£550

Fixed fee + VAT. No hourly rates.

150+

Projects completed

25+

Years' experience

Frequently Asked Questions

Requirements depend on the project and the applicable Building Regulations. We can help arrange an energy assessment for your project.

The accredited assessor confirms the information needed for the calculation.

The assessor confirms timing based on scope, information received and availability.

The assessment has a separate scope and timetable. Any effect on the wider project depends on the assessor's requirements and the relevant authority.

The deliverables and fee are confirmed before instruction.

SAP is a calculation methodology used to assess a building's energy performance. An EPC is a separate certificate; whether it is included depends on the agreed assessor scope.

SAP calculations are separate from Hampshire Build's design packages:

Building Control Loft Conversions Garage Conversions Kitchen Extensions Our Packages & Pricing

Ready to Get Started?

Book a complimentary consultation to discuss an energy calculation for your project.

Hampshire & Surrey · Separate specialist scope · Timing and deliverables confirmed before instruction