Mixed-Use Building BPS in Oregon: Which Tier?

A four-story building in downtown Portland has ground-floor retail, two floors of office space, and a top floor of residential units. Total gross floor area: 52,000 square feet. The owner’s first question isn’t whether Oregon’s Building Performance Standard applies — at that size, it clearly does under ORS 330-300. The real question is how. Which use type determines the EUI target? Does the residential portion count toward the threshold? How do you benchmark a building that has three separate tenant types, two utility meters, and no clean way to split energy consumption by floor?

Mixed-use buildings are the classification headache of Oregon BPS compliance. They don’t fit neatly into a single ENERGY STAR property type, their energy profiles combine the worst characteristics of multiple building categories, and the benchmarking mechanics require more setup than any single-use property. Roughly 15–20% of Oregon’s Tier 1 covered buildings have some form of mixed-use occupancy, and most of those owners haven’t started the classification work that has to happen before an audit can even be scoped.

This post covers the BPS rules that matter for mixed-use owners: how gross floor area and tier classification work when multiple uses share a building, how EUI targets apply, what an ASHRAE Level 2 audit actually looks like in a mixed-use context, and why getting the classification right early saves thousands in audit costs and months of back-and-forth with ODOE.

How ORS 330-300 Classifies Mixed-Use Buildings

Oregon’s BPS statute uses gross floor area — measured to the outside of exterior walls, including all enclosed conditioned and unconditioned space — as the threshold trigger. For mixed-use buildings, the entire building’s gross floor area counts toward the tier determination, regardless of the mix of uses inside.

That means:

• A 38,000 sq ft building with 12,000 sq ft of ground-floor retail and 26,000 sq ft of upper-floor apartments is a Tier 1 building (≥35,000 sq ft, 2028 deadline) — even if the residential component would not independently trigger coverage.
• A 24,000 sq ft building with 8,000 sq ft of commercial office and 16,000 sq ft of residential is a Tier 2 building (≥20,000 sq ft, 2030 anticipated deadline) — the residential square footage counts toward the threshold.
• A 42,000 sq ft building with 30,000 sq ft of warehouse and 12,000 sq ft of attached office is Tier 1, and the warehouse EUI profile (typically low, 25–45 kBtu/sq ft/year) gets combined with the office EUI profile (typically higher, 65–95 kBtu/sq ft/year) in the benchmark.

The building is one covered property. The audit scope covers the whole structure. The compliance obligation belongs to the building owner, not individual tenants.

What About Condominiums and Separately Owned Units?

When a mixed-use building contains individually owned residential or commercial condominiums, the BPS obligation still attaches to the building as a whole. In practice, this means the HOA or building management entity is responsible for coordinating the audit, collecting utility data from individual units, and submitting the compliance documentation. This is one of the most common points of confusion — and delay — we see in the mixed-use market. Owners of individual condo units often assume they’re individually exempt because their unit is under the square footage threshold. The statute doesn’t work that way.

EUI Target Assignment for Mixed-Use Properties

Here’s where mixed-use compliance gets technically interesting. ENERGY STAR Portfolio Manager — the tool ODOE uses for benchmarking — allows buildings to be entered as a single property with multiple use types. Each use type carries its own baseline EUI expectation, and Portfolio Manager generates a weighted benchmark based on the area-weighted mix of uses.

For Oregon BPS, the EUI target your building must meet (or demonstrate progress toward) depends on the predominant use classification assigned during benchmarking. ODOE’s rulemaking under ORS 330-300 establishes target EUI values by building type. Mixed-use properties can be benchmarked in two ways:

1. Single predominant use. If one use type accounts for more than 50% of gross floor area, the building is often benchmarked under that primary use type’s target. A building that’s 60% office and 40% retail benchmarks against the office EUI target.

2. Weighted composite. If no single use dominates, or if the owner elects composite benchmarking, the target becomes an area-weighted blend of the applicable use-type targets.

The choice matters more than most owners realize. Here’s an example of how different classification approaches affect the target for the same building:

Classification Approach	Building Mix	Target EUI (kBtu/sq ft/yr)	Typical Actual EUI	Gap
Office predominant	55% office, 25% retail, 20% residential	68	92	24
Weighted composite (same building)	55% office, 25% retail, 20% residential	72	92	20
Retail predominant	30% office, 55% retail, 15% residential	62	105	43
Multifamily predominant	20% office, 15% retail, 65% residential	78	82	4

The same physical building, classified differently, can show a compliance gap ranging from 4 kBtu to 43 kBtu per square foot. Getting the classification right at the benchmarking stage isn’t a paperwork exercise — it determines the scope and cost of every improvement downstream.

Common Mixed-Use Configurations in Oregon

Oregon’s covered mixed-use inventory clusters into a handful of configurations. Each one carries distinct audit and benchmarking considerations:

Retail-Over-Office (Downtown Cores)

Found throughout Portland’s central business district, Salem downtown, Eugene Broadway corridor, and Medford city center. Ground-floor retail with two to six floors of office above. These buildings typically have separate HVAC zones by floor but shared electrical service. EUI runs 75–110 kBtu/sq ft/year, driven heavily by the retail component’s lighting and display loads.

Audit consideration: Retail tenants on triple-net leases often control their own HVAC and lighting equipment, creating split-incentive problems where the tenant pays the utility bill but the owner bears the compliance obligation. Lease review is a pre-audit step, not an afterthought.

Ground-Floor Retail with Upper-Floor Residential

The fastest-growing mixed-use type in Oregon, concentrated in Portland’s Pearl District, South Waterfront, and Division Street corridor, plus newer developments in Bend, Hillsboro, and Beaverton. Four to seven stories, often built after 2010 under relatively current energy codes.

Audit consideration: Newer construction typically benchmarks closer to target — actual EUI of 55–80 kBtu/sq ft/year against targets of 65–78. The compliance gap is often small, and the most cost-effective path is usually recommissioning and controls optimization rather than equipment replacement. But the utility data collection is complex: individually metered residential units create dozens or hundreds of data points that must be aggregated for Portfolio Manager entry.

Office-Industrial / Flex Space

Common in the Tualatin-Wilsonville industrial corridor, Clackamas County, and the Highway 217 corridor. These buildings combine front-office space (heated, cooled, full-service) with warehouse, manufacturing, or distribution space (often minimally conditioned). Total gross floor area frequently exceeds 50,000 sq ft, but the conditioned portion may be only 30–40% of the total.

Audit consideration: The blended EUI for these buildings looks deceptively low — 35–60 kBtu/sq ft/year — because the warehouse portion pulls the average down. But the office portion may be running 85–100 kBtu/sq ft/year on its own. The audit needs to disaggregate energy use by zone to identify where the real improvement opportunities sit. Our warehouse BPS compliance guide covers the industrial-side considerations in detail.

Hotel with Ground-Floor Restaurant and Retail

Found in tourism-heavy markets: Portland downtown, Bend, Ashland, Oregon Coast communities. Hotel operations drive the EUI profile — 24/7 HVAC, domestic hot water loads from guest rooms, commercial kitchen exhaust, and laundry systems. Adding restaurant and retail components pushes total EUI to 95–140 kBtu/sq ft/year.

Audit consideration: Hotels already carry some of the highest EUI profiles among Oregon commercial buildings. When restaurant and retail loads layer on top, the ASHRAE Level 2 audit scope expands significantly — commercial kitchen ventilation, walk-in refrigeration, and high-capacity water heating all need separate analysis. See our hotel BPS compliance guide for hospitality-specific details.

What the ASHRAE Level 2 Audit Covers in a Mixed-Use Building

An ASHRAE Level 2 energy audit for a mixed-use building follows the same standard as any commercial audit, but the scope is wider and the data collection more involved. Here’s what it actually requires:

Pre-audit data collection (4–8 weeks). Gathering utility records for every meter serving the building — master meters and tenant submeters alike. For a 60,000 sq ft mixed-use building with 40 residential units and 6 commercial tenants, this can mean coordinating data from 50+ individual accounts. The building owner or management company must also provide floor plans, mechanical schedules, occupancy patterns, and lease abstracts showing tenant improvement responsibilities.

On-site assessment (1–3 days depending on building size). The auditor walks every space — common areas, mechanical rooms, parking garages (if conditioned), tenant spaces (requires tenant access coordination), rooftop equipment, and envelope systems. Mixed-use buildings typically require more on-site time than single-use buildings of the same size because the systems are more varied.

Analysis and reporting (4–6 weeks). The audit report produces Energy Conservation Measures (ECMs) ranked by cost, savings, and simple payback. For mixed-use buildings, ECMs are typically grouped by system and by use zone:

ECM Category	Typical Mixed-Use Measures	Estimated Savings	Simple Payback
Lighting	LED conversion in common areas and retail, occupancy sensors in offices	12–22% of lighting energy	1.5–3.5 years
HVAC	VFD on shared air handlers, economizer repair, RTU replacement	15–28% of HVAC energy	3–7 years
Controls	BAS optimization, scheduling by zone, demand-controlled ventilation	8–15% of total energy	1–3 years
Envelope	Air sealing at floor transitions, window film on retail glazing	5–12% of heating/cooling energy	4–8 years
Domestic hot water	Heat pump water heaters for residential, low-flow fixtures	20–35% of DHW energy	3–6 years
Plug loads	Tenant energy management programs, smart power strips	3–8% of total energy	0.5–2 years

A comprehensive ASHRAE Level 2 audit for a mixed-use building typically runs $18,000–$45,000 on a flat-fee basis, depending on building size, number of use types, and metering complexity. Energy Trust of Oregon can reimburse up to 50% of qualifying audit costs — and mixed-use buildings that serve both PGE or Pacific Power electric customers and NW Natural or Avista gas customers may qualify for incentives from both the electric and gas programs.

The Split-Incentive Problem — And How to Solve It Before the Audit

Mixed-use buildings face a compliance challenge that single-use owner-occupied buildings don’t: the split incentive. The building owner holds the BPS compliance obligation, but tenants control much of the energy-consuming equipment and pay the utility bills.

In a typical mixed-use building:

• The owner controls common-area systems (lobbies, corridors, parking, central plant)
• Commercial tenants control their own HVAC zones, lighting, and plug loads under triple-net or modified gross leases
• Residential tenants control in-unit heating, cooling, lighting, and appliances
• Nobody has a financial incentive to invest in the other party’s equipment

Three approaches work in practice:

Green lease provisions. Amending existing leases or incorporating energy performance clauses into new leases. Oregon doesn’t mandate green lease language, but many building owners are adding clauses that require tenants to cooperate with audits, share utility data, and accept minimum efficiency standards for tenant-installed equipment. Getting lease language right before the audit saves months of tenant negotiation afterward.

Cost-sharing agreements for shared-benefit ECMs. When an HVAC upgrade or building automation improvement benefits both the owner (through compliance) and the tenant (through lower utility bills), a cost-sharing arrangement tied to projected savings can align incentives. The audit report provides the savings projections both parties need to negotiate.

Common-area-first strategy. For buildings where tenant cooperation is uncertain, focusing the initial compliance strategy on owner-controlled systems — common area lighting, central plant efficiency, envelope improvements, building automation — can close 40–60% of the EUI gap without touching tenant spaces. This is often enough to demonstrate a credible compliance trajectory to ODOE while longer-term tenant improvements are phased in.

Timeline: Mixed-Use Compliance from Start to Submission

Mixed-use buildings take longer to move through the compliance pipeline than single-use properties. Here’s a realistic timeline for a Tier 1 mixed-use building starting in mid-2026:

Mid-2026: Classification and data collection (2–3 months). Confirm gross floor area, determine tier, identify all utility accounts, begin collecting 12 months of data from every meter. Start tenant outreach for data sharing and access agreements. Use our building coverage guide to confirm your building’s tier status.

Late 2026: ASHRAE Level 2 audit (2–4 months including scheduling). Engage a qualified auditor. Schedule tenant access windows. Complete on-site assessment and receive the audit report with ECM recommendations.

Early 2027: ECM prioritization and funding (1–2 months). Review audit findings, apply for Energy Trust incentives, identify which ECMs can be implemented in owner-controlled spaces vs. tenant spaces, and build the capital plan.

Mid-2027 through mid-2028: Implementation (6–12 months). Execute priority ECMs. Common-area lighting, controls optimization, and central plant improvements can typically happen on a rolling basis without disrupting tenants. Larger mechanical replacements may need to align with lease turnover or seasonal windows.

2028: Benchmarking submission and compliance demonstration. Re-benchmark EUI in Portfolio Manager with post-improvement utility data. Submit to ODOE demonstrating either target attainment or a credible documented compliance pathway with measurable progress.

That’s 18–24 months of work compressed into the roughly 30 months remaining before the Tier 1 deadline. Buildings that start in 2027 instead of 2026 will find auditor availability tighter and contractor schedules fully booked through the compliance deadline.

What Happens If Your Mixed-Use Building Doesn’t Comply

ODOE’s enforcement framework under ORS 330-300 is still being finalized through rulemaking, but the statute provides for penalties and reporting requirements for non-compliant buildings. For mixed-use property owners, non-compliance carries additional risks beyond direct penalties:

• Disclosure requirements that may affect property valuations and refinancing
• Tenant awareness — commercial tenants increasingly expect BPS compliance as a baseline for lease negotiations in Class A and B mixed-use properties
• Insurance and lending implications as ESG reporting becomes standard in commercial real estate underwriting
• Compounding costs — every year of delay means higher energy costs, higher audit fees (as supply tightens), and reduced Energy Trust incentive availability

The practical cost of non-compliance exceeds the direct penalty. A 50,000 sq ft mixed-use building running 25 kBtu/sq ft/year above target at average Oregon commercial rates ($0.09–$0.11/kWh blended) is spending roughly $12,000–$18,000 per year more on energy than it needs to. Over five years, that’s $60,000–$90,000 in avoidable cost — before accounting for the compliance penalty itself.

Frequently Asked Questions

Does the residential portion of my building count toward the 35,000 sq ft threshold?

Yes. Oregon BPS uses gross floor area of the entire building, regardless of use type. If your building has 20,000 sq ft of commercial space and 18,000 sq ft of residential space, total gross floor area is 38,000 sq ft, placing it in Tier 1 with a 2028 compliance deadline. The residential square footage doesn’t get excluded.

Can I benchmark just the commercial portion of a mixed-use building?

No — ODOE requires the entire building to be benchmarked as a single property in Portfolio Manager. You can designate multiple use types within the single property entry (e.g., 55% office, 30% multifamily housing, 15% retail), which allows Portfolio Manager to generate an appropriate weighted benchmark. But you cannot split the building into separate covered properties to avoid benchmarking the whole structure.

How do I get utility data from residential tenants who won’t cooperate?

This is one of the most common practical obstacles in mixed-use compliance. Three options: (1) request whole-building aggregate data from the utility provider — PGE and Pacific Power can provide building-level consumption without disclosing individual tenant data; (2) use green lease provisions that require data sharing as a condition of the lease; (3) for buildings with master meters and tenant submeters, calculate total consumption from the master meter and apportion by submeter readings or by area.

What if my mixed-use building was built after 2015 — do I still need an audit?

Yes. There’s no exemption based on construction date. However, newer mixed-use buildings built to recent Oregon energy code (based on IECC 2018 or later) typically benchmark closer to BPS targets. The audit may confirm you’re already near compliance, and the ECM recommendations will be lighter — potentially controls optimization and recommissioning rather than major equipment replacement. The audit is still required to demonstrate compliance, but the cost of implementation is usually much lower for post-2015 construction.

How much does a mixed-use building audit cost?

Flat-fee ASHRAE Level 2 audit costs for mixed-use buildings in Oregon typically range from $18,000 to $45,000 depending on building size, number of distinct use types, metering complexity, and number of tenants requiring access coordination. A 40,000 sq ft two-use building (retail + office) is at the lower end. A 90,000 sq ft four-use building (retail + office + residential + parking) with 60 individually metered units is at the upper end. Energy Trust reimbursement of up to 50% applies, and our pricing page includes current flat-fee ranges by building type.

Your Mixed-Use Building Has a 2028 Deadline — Start the Classification Now

Mixed-use buildings are the most complex BPS compliance category in Oregon, and they take the longest to move through the pipeline. The classification decision, the tenant data collection, the multi-zone audit scope, the split-incentive negotiation — each step adds weeks that single-use buildings don’t face. The owners who start in 2026 will have their audit reports in hand, their ECM plans funded, and their implementation underway while owners who wait until 2027 are still trying to get utility data from unresponsive tenants.

Oregon Building Compliance provides flat-fee ASHRAE Level 2 compliance audits for mixed-use buildings across Oregon — from two-story retail-over-office in Salem to seven-story residential towers with ground-floor commercial in Portland. We handle the classification analysis, the tenant data coordination, the multi-use benchmarking setup in Portfolio Manager, and the full audit scope across every use zone in the building.

Schedule your compliance audit and get your mixed-use building’s BPS classification, EUI baseline, and improvement roadmap locked in before the 2028 deadline window closes. Or if you’ve already been audited and need ongoing tracking, set up annual benchmarking to keep your mixed-use building’s EUI documented and your ODOE submissions current year over year.

Have questions about how BPS applies to your specific building configuration? Email mike@oregonbuildingcompliance.com or visit our how it works page for the full compliance process breakdown.