SAP Calculations
Part L compliance for dwellings: design-stage and as-built SAP, plus the EPC on completion.
Find out more →SBEM Calculations
Part L compliance for commercial buildings: design and as-built SBEM, the BRUKL report, plus the non-domestic EPC.
Find out more →Part O Overheating Assessments
Overheating compliance for Approved Document O — simplified method or dynamic thermal modelling (TM59), England, Wales and Scotland.
Find out more →Energy Statements & Renewables Reports
Reports to satisfy planning conditions: CO₂/energy demand reductions and renewables requirements.
Find out more →Water Efficiency Calculations for Part G
Part G water efficiency calculations for new dwellings — 125 or 110 l/p/d, evidenced for Building Control.
Find out more →Air Tightness Testing
Air permeability testing for Part L sign-off — every new dwelling, plus commercial — with a pre-test sealing checklist.
Find out more →Sound Testing (Part E)
Part E airborne and impact sound testing for attached dwellings and conversions, plus environmental noise surveys.
Find out more →Services for Residential Buildings
The full residential compliance stack: SAP, EPC, overheating, water, air and sound.
Find out more →Services for Commercial Buildings
SBEM, commercial EPCs, air testing and environmental noise surveys.
Find out more →Just need a calculator to DIY?
Meet our Monkeys — free browser tools that do the sums for you, no sign-up, no catch. They can help you out.
The bit most consultants leave out
We’ve been on your side of the table
Alongside the technical work, we’ve built and managed our own development projects — from buying the land to handing over the keys. We’ve sweated the same deadlines, argued with the same Building Control officers, chased the same suppliers and watched the same budgets wobble. We’ve made the expensive mistakes already, so you don’t have to.
So when a calculation fails, we don’t just send the bad news and an invoice — we point you at the fix that’s cheapest and most practical on a real site. You’re not buying a set of numbers; you’re getting a consultant who’s stood exactly where you’re standing.