For Quantity Surveyors · RICS WLCA 2nd ed.

Carbon assessment that starts where the Bill of Quantities ends.

Upload a BoQ, map quantities to 5,494+ embodied-carbon factors, and produce a defensible A1–A5 report with every figure traceable to ICE, EPiC, EC3 or ÖKOBAUDAT.

5,494+
Materials catalogued
11
Sectors benchmarked
10
Primary sources cited
How it works

From BoQ to board-ready in four steps.

Designed for the way surveyors actually work — Excel-shaped data in, defensible PDF out. 140 high-confidence factors from primary databases, 5,354 adapted variants for full coverage.

01
Define the project

Pick the sector. We attach the right benchmark band — LETI, RICS, NHS, PAS 2080.

02
Bring in the BoQ

Drop in an Excel BoQ or start from a sector-typical template. Each line maps to a material.

03
See cost and carbon together

Tendered cost and shadow carbon cost in the same view. Top contributors. Confidence weighting.

04
Issue the report

RICS-aligned A1–A5 report that ties every kilogram of CO₂e back to its primary source.

Sectors

Benchmarks built in.

Every project type ships with the right benchmark band so your figure has context the moment you finish the BoQ.

350800 kgCO₂e/m²
Residential — house / small block
median 500 · LETI 2020 / RIBA 2030
5001200 kgCO₂e/m²
Residential — large / high-rise
median 800 · RICS WLCA
6001400 kgCO₂e/m²
Commercial office
median 950 · LETI 2020 / WLCN
5001100 kgCO₂e/m²
Retail
median 750 · RICS WLCA
200600 kgCO₂e/m²
Industrial / warehouse
median 350 · UKGBC
4501000 kgCO₂e/m²
Education
median 700 · DfE Output Specification (2022)
8001800 kgCO₂e/m²
Healthcare
median 1200 · NHS Net Zero Building Standard (2023)
60220 kgCO₂e/m²
Road / highway
median 110 · PAS 2080
12003500 kgCO₂e/m²
Bridge
median 2200 · IStructE 2022
6001500 kgCO₂e/m²
Hospitality
median 950 · RICS WLCA
5501400 kgCO₂e/m²
Civic / public building
median 900 · LETI 2020
Methodology

Defensible to the last kilogram.

Every factor has a citation. Where a primary database publishes the value directly, the row is flagged High. Adapted or interpolated values are flagged Medium or Low — so you and your client know which to replace with supplier EPDs before formal sign-off.

Reporting boundary: A1–A5 per RICS WLCA PS 2nd ed. (2023). Biogenic carbon reported ex-sequestration.

ICE Database v3.0
2019
Hammond, G. & Jones, C. (2019). Inventory of Carbon & Energy (ICE) Database, Version 3.0. Circular Ecology / University of Bath.
EPiC Database
2019
Crawford, R.H., Stephan, A. & Prideaux, F. (2019). Environmental Performance in Construction (EPiC) Database. University of Melbourne.
EC3 — Embodied Carbon in Construction Calculator
2024
Building Transparency (2024). EC3 Tool — aggregated EPD database.
RICS Whole Life Carbon Assessment
2023
RICS (2023). Whole Life Carbon Assessment for the Built Environment, 2nd ed. Royal Institution of Chartered Surveyors.
IStructE — How to Calculate Embodied Carbon
2022
Institution of Structural Engineers (2022). How to Calculate Embodied Carbon, 2nd edition.
BRE Green Guide to Specification
2015
Building Research Establishment. Green Guide to Specification.
ÖKOBAUDAT
2024
Federal Ministry of Housing, Urban Development and Building, Germany. ÖKOBAUDAT.
worldsteel — LCA Methodology Report
2023
World Steel Association (2023). Life Cycle Inventory Methodology Report.
FAQ

Questions surveyors ask.

Is this an alternative to One Click LCA or eToolLCD?+

SustainQuant sits earlier in the cycle — for QS teams scoping and pricing options. We use the same primary datasets (ICE, EC3, ÖKOBAUDAT) so figures reconcile with full LCA tools at later RIBA stages.

How accurate are the numbers?+

Each line carries a confidence flag. High = directly published in a primary database. Medium/Low = adapted or interpolated and clearly labelled. Overall report confidence is shown alongside the headline.

What carbon scope is reported?+

Cradle-to-practical-completion (A1–A5) per RICS WLCA PS 2nd edition. Operational (B6) and end-of-life (C1–C4) are on the roadmap.

Can we add our own EPDs?+

Yes — admins curate the company library, add EPDs, edit factors, retire suppliers. All edits are scoped per organisation.

Take it for a spin.

The demo ships with eight sector-typical BoQs and one real client BoQ ready to open.

user / user · admin / admin