Part L & Part O Compliance — Delivered in 48 Hours

👉 SwiftSAP delivers more than compliance — SwiftScore™ shows your project's performance and optimisation potential in one clear score.

Fast, accurate, and compliant — so your build schedule never stops.

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Reliability

On Time — Every Time

Clear Packages — 48 hrs Turnaround

Choose the option that fits your development. All reports delivered within 48 hours of receiving full drawings.

Part L (SAP Only)

A Building Regulations (Part L) energy-efficiency compliance check. Fast, accurate results to keep your project on schedule.

£195.00

≤ 48 hours delivery

A Building Regulations (Part L) energy-efficiency compliance check. Fast, accurate results to keep your project on schedule.

Feature highlights:

≤ 48 hour turnaround
Building Control-approved outputs
Direct assessor communication

What You Need to Provide:

Floor plans, sections & elevations
Site orientation / site plan
Construction specs for walls, roofs, floors
Window specifications
Services details (heating, hot water, lighting, ventilation)
Renewable technologies (e.g. Solar PV)

What's Included:

Full SAP assessment and documentation
Expert recommendations for improving performance

Note — Bespoke wall types

Standard SAPs use recognised junctions (masonry / cavity walls). For non-standard builds (e.g. timber frame, SIPs, ICF), bespoke thermal bridge checks may be needed — typically ≈ £170 per junction, always confirmed before we proceed.

Get Quote – SAP Only

Part L + Simplified Part O

SAP and simplified overheating assessment for smaller developments or design-build projects needing fast sign-off.

£395.00

≤ 48 hours delivery

SAP and simplified overheating assessment for smaller developments or design-build projects needing fast sign-off.

Feature highlights:

≤ 48 hour turnaround
Dual Part L & Part O compliance
Priority support from our assessors

What You Need to Provide:

Floor plans, sections & elevations
Site orientation / site plan
Construction specs for walls, roofs, floors
Window specifications
Services details (heating, hot water, lighting, ventilation)
Renewable technologies (e.g. Solar PV)

What's Included:

Complete SAP + Part O documentation
Guidance to achieve compliance on first submission

Note — Bespoke wall types

Standard SAPs use recognised junctions (masonry / cavity walls). For non-standard builds (e.g. timber frame, SIPs, ICF), bespoke thermal bridge checks may be needed — typically ≈ £170 per junction, always confirmed before we proceed.

Get Quote – Package 1

Popular

Part L + Full TM59 Overheating

Comprehensive SAP and TM59 modelling for complex or high-value residential units. Ideal for developments requiring detailed overheating routes and full Part L compliance.

Most comprehensive solution for challenging projects.

£695.00

≤ 48 hours delivery

Comprehensive SAP and TM59 modelling for complex or high-value residential units. Ideal for developments requiring detailed overheating routes and full Part L compliance.

Feature highlights:

≤ 48 hour turnaround
Full TM59 analysis included
Detailed report with recommendations

What You Need to Provide:

Floor plans, sections & elevations
Site orientation / site plan
Construction specs for walls, roofs, floors
Window specifications
Services details (heating, hot water, lighting, ventilation)
Renewable technologies (e.g. Solar PV)

What's Included:

SAP + TM59 assessment and documentation
Expert recommendations for energy and comfort performance

Note — Bespoke wall types

Standard SAPs use recognised junctions (masonry / cavity walls). For non-standard builds (e.g. timber frame, SIPs, ICF), bespoke thermal bridge checks may be needed — typically ≈ £170 per junction, always confirmed before we proceed.

Get Quote – Package 2

Avoid delays — Get a Fast Quote

Why Developers, Design-Build Firms & Air-Testing Companies Choose SwiftSAP

48-Hour Turnaround

Reports delivered in two working days to keep build programmes moving and avoid costly project delays.

Clear Fixed Packages

Transparent pricing with no hidden fees, no add-ons, and no re-quotes — total cost certainty from the start.

SwiftScore™ Performance Insight 🚀

Every report includes SwiftScore™ — a unique score that turns complex data into clear insight, showing energy efficiency, overheating risk, and optimisation potential. This helps you make smarter, compliant design decisions. Add overheating or water analysis for even greater accuracy.

Part L + Part O Specialists

Focused exclusively on residential compliance for 1–15 unit projects, with over 500 UK projects successfully delivered.

Direct Assessor Access

Speak directly with a qualified Elmhurst assessor who understands your project — not a call centre or admin team.

Partnership Support

Ideal for developers and air-testing companies seeking a dependable long-term compliance partner who helps keep projects on track.

Start Your Compliance Today

Example Projects (Demonstration Samples)

2-Dwelling Conversion — Demonstration

Initial SAP fail due to high U-values; passed after insulation redesign.

View details

Scenario

Two-unit conversion of an existing office building into flats in South Yorkshire.

Challenge

Initial SAP assessment failed to meet Part L targets.

U-values for walls, roof, and floor exceeded limits because of insufficient insulation thickness and product specification.

Approach

– Reviewed thermal performance of existing fabric.
– Recommended alternative insulation products and increased thickness to achieve compliant U-values.
– Updated SAP inputs and reran calculation.

Result

Both units achieved Part L compliance with a comfortable margin.

Total turnaround time: 48 hours from revised specification submission.

Project type: Conversion / change of use (demonstration example)

Software: DesignBuilder / SAP 10.2

Accreditation: Elmhurst OCDEA

"This demonstration example illustrates SwiftSap's workflow and problem-solving process."

3-Dwelling New Build — Demonstration

TM59 Overheating fail resolved with solar glazing and MVHR solution.

View details

Scenario

Three-unit new-build residential development with large south-facing glazing and compact bedroom layouts.

Challenge

TM59 overheating analysis showed non-compliance: bedrooms and kitchen–living rooms exceeded temperature limits under typical summer conditions.

Approach

– Specified solar-control glazing (g = 0.45) for south-facing windows.
– Introduced mechanical ventilation with heat recovery (MVHR) to increase fresh-air supply to bedrooms.
– Re-ran TM59 model to verify comfort criteria.

Result

All spaces achieved TM59 compliance; annual hours of overheating reduced below threshold.

Total turnaround time: 48 hours from design update.

Project type: New-build residential (demonstration example)

Software: DesignBuilder / TM59 method

Accreditation: Elmhurst Overheating Assessor

"This demonstration example illustrates SwiftSap's reporting style and resolution approach."

Get Your SAP Quote in 2 Hours

Fast, reliable compliance reports with 48-hour delivery. Fill out the form below and we'll respond within 2 hours.

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Within 2 hours during business hours

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Compliance Delivered

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On Time — Every Time

48

Hours Turnaround

Experience from 500+ compliance projects in the UK housing sector

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Wall Type

*Non-standard wall types may require bespoke thermal bridge (Ψ-value) checks — typically around £170 per junction. We'll confirm this before proceeding.

✅ Same-day response • ✅ 48-hour turnaround • ✅ Certified SAP Assessors