Reviewed by Gary E. Wilson, President & Designated Broker · Managing Greater Seattle rentals since 1982
Washington's Clean Buildings Performance Standard is the first regulation in a generation to impose an ongoing operational obligation on commercial building owners purely because of the building's size. It is not triggered by a sale, a permit or a tenant fit-out. It applies because the building exists and exceeds a square footage threshold, and the compliance dates arrive whether or not anyone has been paying attention.
For office owners in the Puget Sound region this is now an operating requirement rather than a future consideration, and the earliest deadlines have already passed.
Wilson Management administers energy compliance for office property across Bellevue, Seattle and the Eastside. For the wider service see Office Property Management.
Which Buildings Are Covered
Tier 1 covers buildings where the sum of nonresidential, hotel, motel and dormitory floor area exceeds 50,000 gross square feet, excluding parking garage area.
Tier 2 covers buildings where those floor areas exceed 20,000 but do not exceed 50,000 gross square feet, again excluding parking garage area. Tier 2 also picks up multifamily residential buildings at or above 50,000 gross square feet.
The exclusion of parking garage area matters more than it sounds. A building whose gross area appears to cross a threshold may not once structured parking is removed from the calculation, and the reverse is also true — an owner who has assumed their building is out of scope should confirm the number rather than estimate it.
(Source: Washington State Department of Commerce, Clean Buildings Performance Standard, as of August 2026.)
The Dates
Tier 1 compliance is staggered by building size, with the largest buildings first:
- Over 220,000 sq ft — 1 June 2026. This deadline has now passed.
- 90,000 to 220,000 sq ft — 1 June 2027.
- 50,000 to 90,000 sq ft — 1 June 2028.
Tier 2 buildings report compliance to Commerce by 1 July 2027, and every five years thereafter.
An owner of a large building who has not addressed this is already past the date rather than approaching it, and the appropriate response is to establish the building's actual position immediately rather than to work toward the next deadline.
This page is general information, not legal or regulatory advice.
What Compliance Actually Requires
The standard is not a single filing. Covered buildings must benchmark energy use, implement an operations and maintenance programme, and create an energy management plan.
Benchmarking means measuring and reporting the building's energy use, which requires whole-building data. That is straightforward where the landlord holds the meters and considerably harder in a building with tenant-held accounts, because the landlord needs consumption data it does not directly receive. Obtaining it is an administrative exercise involving utilities and tenants, and it takes longer than owners expect — which is the main reason to start well before a deadline rather than near it.
The operations and maintenance programme documents how the building's systems are actually operated and maintained. In a well-run building much of this already exists in practice; the requirement is that it exists in a documented form.
The energy management plan sets out how the building will be managed toward the performance target, including the measures identified and their sequencing.
Where a building does not meet the energy use target, the path forward involves identifying and implementing measures — which is where compliance stops being administrative and starts touching capital.
Where It Meets Capital Planning
The measures that move a building's energy performance are, for the most part, the same systems that appear on a capital plan anyway: HVAC equipment and controls, lighting, the building envelope, and the commissioning that makes any of it perform as designed.
That overlap is the opportunity. A building replacing ageing rooftop units in the next few years can specify equipment that serves both the operational need and the performance target, at little marginal cost over a like-for-like replacement. The same work planned separately, or done reactively at failure, frequently captures neither benefit.
Controls and commissioning deserve particular attention because they are cheap relative to equipment and often produce the largest measurable change. A building whose systems were never properly commissioned, or whose controls have drifted over a decade of adjustments, is consuming energy for no benefit — and correcting that improves both the performance figure and the tenant complaints. See HVAC and Air Quality and Asset Planning.
Cost Recovery
Whether compliance costs are recoverable from tenants depends on the leases, and the answer is frequently unclear because most leases were written before this obligation existed.
Benchmarking and administrative costs may fall within operating expenses. Capital measures generally do not, except where a lease permits amortised recovery of capital items — and some leases specifically allow recovery of expenditures required by law or intended to reduce operating costs, which is precisely the category this work falls into.
This is worth establishing across the rent roll before the spending happens rather than at reconciliation, when the classification will be contested. See CAM Reconciliation.
Getting Tenant Data
The practical obstacle to benchmarking is rarely the analysis. It is obtaining whole-building energy data in a building where tenants hold their own utility accounts.
The landlord needs consumption for the entire building, and it holds only the accounts in its own name. The rest sits with individual tenants, and obtaining it means either aggregated data from the utility or cooperation from each tenant.
Utilities in the region offer routes to aggregated whole-building data, generally subject to conditions about the number of accounts involved so that individual consumption cannot be identified. Where those conditions are not met, the data has to come from tenants directly.
Two things make that easier. Leases signed going forward can require tenants to provide consumption data or authorise its release, which costs nothing to include and solves the problem permanently. And existing tenants generally cooperate when asked properly and told why — most have their own reporting interests and no reason to object.
What does not work is leaving it until the compliance date is close. Assembling data across a multi-tenant building takes weeks at best, and it is the step most likely to be underestimated.
Frequently Asked Questions
Which buildings does the Clean Buildings Standard cover?
Tier 1 covers nonresidential, hotel, motel and dormitory floor area exceeding 50,000 gross square feet excluding parking garage. Tier 2 covers 20,000 to 50,000 gross square feet on the same basis, and also multifamily at or above 50,000.
Has any deadline already passed?
Yes. Tier 1 buildings over 220,000 square feet were due on 1 June 2026. Owners of large buildings who have not addressed this are past the date, not approaching it.
What are the remaining dates?
Tier 1 at 90,000 to 220,000 square feet on 1 June 2027, and 50,000 to 90,000 square feet on 1 June 2028. Tier 2 reports by 1 July 2027 and every five years after.
Does parking count toward the threshold?
No — parking garage area is excluded from the calculation, which can move a building either side of a threshold. Confirm the figure rather than estimating it.
What does compliance involve?
Benchmarking energy use, an operations and maintenance programme, and an energy management plan. Where the building does not meet the target, identifying and implementing measures follows.
Why start early?
Because benchmarking needs whole-building data, and in a building with tenant-held utility accounts that data has to be obtained from utilities and tenants. It reliably takes longer than owners expect.
Can compliance costs be recovered from tenants?
It depends on the leases, and most were written before this obligation existed. Some permit recovery of expenditures required by law or capital intended to reduce operating costs. Establish it before spending, not at reconciliation.
How do we get energy data from tenants?
Either aggregated whole-building data from the utility, subject to its conditions on account numbers, or from tenants directly. Leases signed going forward can simply require it, which costs nothing to include and solves the problem permanently.
What is the cheapest way to improve performance?
Usually controls and commissioning rather than equipment. A building whose systems were never properly commissioned, or whose controls have drifted over a decade, is consuming energy for no benefit — and correcting it improves the tenant complaints at the same time.
Get Started
The Clean Buildings Standard applies because of what a building is, not what its owner does, and the first deadlines are behind us. Wilson Management, Inc. can establish where a building stands and what it needs.
Request a free analysis or contact us. You can also reach our Bellevue office at (425) 453-0089, 1380 112th Ave NE #203, Bellevue, WA 98004.
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