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Value Engineered Compliance

Your current assessoronly passes your building.We make it more profitable.

Most compliance consultants stop at certification. At Build Envelope we go further — providing every design stage calculation, on-site test, and compliance certificate your development needs through a single point of contact. All coordinated by one team, through our client portal from planning through to handover, while finding hidden savings without compromising your EPC rating or sign-off.

Case Study — 7 plot Housing Development
£20,874
Additional profit released. Same EPC rating. Same compliance. Different spec.
Case Study — 48 plot Apartment Block
£84,192
Saved across the block — £1,754 per plot — without compromising certification.
Our Guarantee

Free specification review on every multi-plot enquiry. 

SITMA Accredited BPEC Registered ATTMA Accredited DesignBuilder Elmhurst Approved Assessor

Most developments are leaving profit on the table — and no-one's telling you.

Architects design to a brief. They balance aesthetics, function, programme, and cost — with building regulations as one of many constraints. They use standardised material specs that will comfortably achieve compliance without revisiting every detail on every project.

Standard assessors certify to a threshold. Their job is to tell you whether you've passed. They're paid a fixed fee to produce a certificate — not to spend hours modelling whether a different insulation spec or a recalibrated air permeability target could maintain your EPC rating while costing you less to build.

The result: almost every development we review contains opportunities — in U-values, thermal bridging, air tightness strategy, or system specification — where the notional dwelling approach has quietly added cost without adding performance.

The granular analysis that finds these savings happens during assessment. But when the result says "pass," it rarely loops back to ask: could we have got here cheaper?

Compliance as a profit lever, not a sign-off exercise.

We engage early, model your building thoroughly, and deliver compliance alongside concrete recommendations. One point of contact from design through to certification.

01
Early Engagement
We review your drawings and specification during design — before procurement locks in material choices and limits your options.
02
Compliance Modelling
We run SAP, overheating, and thermal performance assessments — and model alternative routes to the same outcome at lower cost.
03
Specification Refinement
We identify the specific changes — insulation spec, air permeability target, thermal bridging — that release hidden margin without touching compliance.
04
Testing & Sign-Off
We conduct all required on-site testing across Part L, E, F, and O — and issue your compliance certificates. One team, start to finish.

Real developments. Real savings. Same compliance.

Value Engineered Compliance — residential development
Housing Development
Seven 3-bed detached houses, Midlands
Value Engineered Compliance — detached house
Standard spec
86B EPC
Value Engineered
87B EPC
Hidden profit released
+£20,874
£2,982 per plot
across 7 houses
Apartment Block
48-unit apartment block, South West
Value Engineered Compliance — apartment block
Standard spec
82B EPC
Value Engineered
83B EPC
Hidden profit released
+£84,192
£1,754 per plot
across 48 units

Every compliance service your development needs, under one roof.

Design-stage calculations, on-site testing, and certification across every relevant Approved Document — coordinated by a single team from planning through to handover.

Design & Planning
Residential & Commercial
Part L
SAP Calculations & EPC
Design stage and as-built SAP assessments for new build dwellings, with full EPC generation for Building Control and planning.
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Part L
SBEM Calculations
Simplified Building Energy Model assessments for non-domestic buildings, offices, retail, and mixed-use developments.
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Planning
Energy Statements
Energy strategy reports for planning applications, demonstrating compliance with local authority sustainability policies.
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Part L / F
Heat Loss Calculations
Room-by-room heat loss analysis using dynamic thermal modelling with local weather data to inform HVAC design and sizing.
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Part O
Overheating Assessments
Simplified and dynamic thermal modelling to demonstrate Approved Document O compliance and inform glazing and shading strategy.
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Part L
Overglazed Extension Calculations
Compliance assessments for highly glazed extensions and conservatories, demonstrating acceptable thermal performance under Part L.
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BS EN ISO
U-Value Calculations
Thermal transmittance calculations for walls, roofs, floors, and windows to BS EN ISO 6946 and 10211 standards.
Learn more →
BS EN ISO
PSI-Value Calculations
Linear thermal transmittance calculations for junctions and thermal bridges, reducing heat loss and improving SAP ratings.
Learn more →
Part G
Water Usage Assessments
125 litre/person/day calculations for planning and Building Control, covering wholesome and non-wholesome water consumption.
Learn more →
Free Specification Review

Have a development in mind?
Send us your drawings.

We'll review your specification at no cost and show you exactly where the savings are — before you commit to anything.

Start a conversation →
Client portal

Your projects, documents, and compliance status — all in one place.

Every Build Envelope client gets access to our dedicated client portal. No more chasing emails for certificates or wondering where your project is at. Log in, check your status, and download your documents — anytime.

Whether you have a single plot or a 200-unit scheme, the portal gives you real-time visibility across every compliance discipline we're handling for you.

Download certificates & reports
EPCs, SAP reports, air tightness certificates, sound test results — all stored securely and available to download the moment they're issued.
Track project progress
See where each plot or unit sits in the compliance process — from design stage assessment through to on-site testing and final certification.
Secure & always available
Your data is encrypted and accessible 24/7. Share access with your project team, site managers, or building control — you control who sees what.
Mobile-friendly — Android & iOS
Capture and upload site photos directly from your phone or tablet. Whether you're on Android or iPhone, snap images on site and attach them to your project — no need to wait until you're back at a desk.

Get in touch

We work with developers, housebuilders, and architects across the Midlands and South West. If you have a project coming up, we'd like to hear about it.