Carbon Footprint for Architecture and Design Firms: A Practical Guide

Why Architecture and Design Firms Are Receiving Carbon Questionnaires

The carbon footprint for architecture, interior design, and engineering design firms is becoming a standard supplier disclosure requirement in 2026. Three client types are driving this:

1. Construction and developer clients under CSRD — Large property developers, housebuilders (Barratt, Taylor Wimpey, Persimmon), and infrastructure companies with CSRD obligations are collecting Scope 3 supplier data from their professional services supply chain — including architects, engineers, and design consultancies.

2. Public sector framework procurement — RIBA, NEC, and JCT contracts for public sector work increasingly include sustainability requirements. Government Construction Strategy and the UK Green Building Council's net zero whole life framework expect professional consultants to have measured their own emissions.

3. B Corp and sustainability certification — Architecture practices pursuing B Corp certification, ISO 14001, or RIBA 2030 Climate Challenge commitments need a measured carbon baseline to meet accreditation criteria.

What Does an Architecture Firm's Carbon Footprint Look Like?

Design and architecture practices have an operational emissions profile dominated by:

Scope 1 — typically small: - Gas heating in studio/office space - Company vehicles (site visit cars, vans)

Scope 2 — moderate: - Studio and office electricity (computers, printers, model-making equipment)

Scope 3 — largest category: - Category 6 (business travel) — client site visits, travel to planning meetings, international project travel; often the largest single emission source for a design practice - Category 7 (commuting) — particularly significant for London-based practices - Category 5 (waste) — model-making materials, print waste, physical samples - Category 1 (purchased goods) — physical model materials, printing, specialist equipment

Note: Architecture firms do NOT include the embodied carbon of the buildings they design in their corporate carbon footprint. The buildings' construction emissions belong in the developer client's or contractor's Scope 3 Category 11. However, designers specifying low-carbon materials are increasingly expected to demonstrate this in project-level carbon declarations.

Worked Example: UK Architecture Practice

Sample company: A 22-person London architecture firm

Scope 1 — Gas (studio): 5,500 m³ × 2.204 = 12,122 kgCO2e = 12.1 tCO2e

Scope 2 — Electricity: 38,000 kWh × 0.207 = 7,866 kgCO2e = 7.9 tCO2e

Scope 3 — Business travel (site visits + client meetings): Rail (London–Manchester × 24 return trips): 24 × 0.003 tCO2e = 0.07 tCO2e Car mileage (site visits, 8,000 km): 8,000 × 0.170 = 1,360 kgCO2e = 1.4 tCO2e Flights (international projects × 4): 2.8 tCO2e Scope 3 Category 6 total: 4.3 tCO2e

Scope 3 — Commuting (22 staff, London): 10.6 tCO2e

Scope 3 — Waste (model materials, printing): 0.8 tCO2e

Total: 35.7 tCO2e | Per employee: 1.6 tCO2e/FTE

RIBA 2030 Climate Challenge and Carbon Reporting

The RIBA 2030 Climate Challenge calls on practices to achieve net zero operational carbon in their own offices by 2030. The first step is measuring the practice's operational carbon — Scope 1, 2, and 3 emissions from running the studio. Practices that sign up to the RIBA 2030 challenge are expected to report their baseline and track progress annually.

A DeCarbonOPS Carbon Passport provides exactly this baseline — the operational practice footprint that satisfies both RIBA 2030 reporting and CSRD supplier questionnaire requirements from developer clients.

Getting Started: Carbon Passport for Architecture Practices

DeCarbonOPS calculates your studio's Scope 1, 2, and 3 operational footprint from your utility bills and travel records in 15–25 minutes. Free for your first annual Carbon Passport — producing a verification URL and PDF accepted by UK public sector procurement, developer clients, and B Corp assessors.