BREEAM Fit-Out is the sustainability-certification counterpart to WELL. This guide covers the rating scheme, the main credit categories, cost impact against standard fit-out, and how BREEAM Fit-Out differs from BREEAM New Construction.
BREEAM Fit-Out assesses commercial office CAT B fit-out against environmental and sustainability standards. It's the fit-out counterpart to BREEAM New Construction (for base-build) and BREEAM In-Use (for operational performance).
Rating levels:
London institutional fit-outs typically target Very Good to Excellent. Outstanding is rare in pure CAT B fit-out.
Credits distributed across nine categories:
Project team, aftercare, commissioning.
Daylight, thermal comfort, acoustic, indoor air quality.
LED lighting, energy metering, low-energy systems.
Alternative transport facilities, cyclist provision.
Low-flow fittings, leak detection.
Responsibly sourced, low-environmental-impact materials.
Construction waste management, operational waste provision.
Limited relevance in CAT B fit-out.
Refrigerant leakage, NOx emissions, low-impact materials.
| Rating target | Cost uplift | Programme uplift |
|---|---|---|
| Pass | +0–2% | 1–2 weeks |
| Good | +2–5% | 2–4 weeks |
| Very Good | +5–8% | 4–6 weeks |
| Excellent | +8–15% | 6–10 weeks |
| Outstanding | +15–25% | 10–14 weeks |
Easy win — LED plus DALI/presence control is standard spec anyway. 6–8 credits available.
FSC timber, certified carpet, Cradle-to-Cradle flooring. Specify early.
80%+ diversion from landfill via segregation. Easy for competent contractors.
Low-flow taps, dual-flush WCs, waterless urinals. Standard spec in 2026.
Independent commissioning engineer. Already standard on major fit-outs.
Significant credit overlap — pursuing both is efficient:
BREEAM-aligned delivery to any target rating. Partner BREEAM AP for certification management. See Office Fit-Out, Office Refurbishment.
Not legally required. Increasingly mandated by institutional landlords via licence-to-alter, or by corporate ESG policies.
Yes — BREEAM Refurbishment and Fit-Out scheme covers both.
Interim assessment at design; post-construction assessment at PC. Final certificate typically 12–16 weeks post-PC.
Measured survey and fixed-price quote within 10 working days.