Berkeley BESO Compliance Guide | Parker George Team
Berkeley BESO Compliance Guide
Everything sellers and buyers need to know about the Building Emissions Saving Ordinance in 2026 — energy scores, credits, costs, and what it means for your transaction.
Key Takeaways
- Berkeley sellers of 1–2 unit homes must obtain a Home Energy Score before listing as of January 1, 2026
- You need 6 credits from an approved upgrade list — or defer upgrades to the buyer with a $5,000 deposit
- A single heat pump water heater or heat pump HVAC earns all 6 credits on its own
- Upgrades completed in the past 5 years already count — you may already be compliant
- Missing the Home Energy Score before listing triggers a $500 fee
Table of Contents
What Is BESO?
Berkeley’s Building Emissions Saving Ordinance (BESO) requires sellers of residential properties to complete a Home Energy Score assessment and either make qualifying energy upgrades or defer those upgrades to the buyer before close of escrow. The ordinance is designed to reduce greenhouse gas emissions from Berkeley’s existing housing stock by tying energy efficiency requirements to the moment of sale — when properties change hands and improvements are most likely to happen.
The law uses a flexible credit-based system. Instead of mandating one specific upgrade, it lets property owners choose from a menu of improvements. That flexibility matters: a seller who installed a heat pump water heater last year is already done. A seller who hasn’t touched their systems in a decade has options — and so does the buyer.
Who Does BESO Apply To?
BESO applies at the time of sale for most residential buildings in Berkeley.
| Property Type | BESO Effective Date |
|---|---|
| Single-family homes (1 unit) | January 1, 2026 |
| Duplexes (2 units) | January 1, 2026 |
| Triplexes and fourplexes (3–4 units) | January 1, 2028 |
| Multifamily / commercial under 15,000 sq ft | Assessment required at listing |
| 15,000–24,999 sq ft | Assessment + annual benchmarking |
| 25,000+ sq ft | Assessment every 5 years + annual benchmarking |
BESO does NOT apply to: Condominiums, ADUs, buildings under 850 sq ft, historic structures, or industrial/scientific buildings.
The Credit-Based Compliance System
To meet BESO’s Resilience Standard, you need at least 6 credits from the City’s approved upgrade list. Upgrades completed within the 5 years before your sale date count.
6-Credit Upgrades (Single Upgrade = Full Compliance)
| Upgrade | Credits | Typical Cost Range |
|---|---|---|
| Heat Pump Water Heater | 6 | $3,000–$6,000 |
| Heat Pump HVAC | 6 | $10,000–$20,000 |
| Knob & Tube Wiring Replacement (with 240V pre-wiring) | 6 | $5,000–$50,000 |
| Smart Service Panel (automated load management) | 6 | $2,000–$6,000 |
| Electrical Service Panel Upgrade (e.g., 100A → 200A) | 6 | $2,000–$10,000+ |
3-Credit Upgrades
| Upgrade | Credits | Typical Cost Range |
|---|---|---|
| Solar PV (photovoltaic panels) | 3 | $12,000–$30,000+ |
| Battery Energy Storage System | 3 | $8,000–$20,000+ |
2-Credit Upgrades
| Upgrade | Credits | Typical Cost Range |
|---|---|---|
| EV Charger (Level 2) | 2 | $500–$2,000 |
| Electric or Induction Range (replacing gas) | 2 | $800–$3,000 |
| Window Replacements (50–75% of windows) | 2 | $5,000–$15,000+ |
| Window Replacements (75%+ of windows) | 4 | $5,000–$15,000+ |
| High Home Energy Score (9 or 10) | 2 | Depends on assessment |
| Wall Insulation (50–75% of exterior walls) | 2 | $3,000–$8,000 |
| Wall Insulation (75%+ of exterior walls) | 4 | $8,000–$15,000 |
| Attic Insulation (min. R-38) | 2 | $1,500–$4,000 |
| HVAC Duct Improvements | 2 | $1,000–$3,000 |
| Whole-House Fan | 2 | $800–$2,000 |
| Heat Pump Clothes Dryer | 2 | $1,000–$2,000 |
| Pre-Wiring & 240V Receptacles (3+ circuits) | 2 | $1,000–$3,000 |
1-Credit Upgrades
| Upgrade | Credits | Typical Cost Range |
|---|---|---|
| Electric Clothes Dryer (resistive) | 1 | $400–$800 |
| Pre-Wiring & 240V Receptacles (1–2 circuits) | 1 | $300–$1,000 |
| Floor/Crawlspace Insulation | 1 | $1,500–$4,000 |
| Greywater System | 1 | $1,000–$4,000 |
| Air Sealing | 1 | $500–$1,500 |
All work must be permitted and meet current code requirements. Credits from unpermitted work do not count.
Your Three Compliance Options
Option A: Complete Upgrades Before Listing
Install enough upgrades to reach 6 credits, submit documentation through the BESO Portal, pay the $150 filing fee, and receive a Certificate of Compliance before close. Upgrades done in the past 5 years count. The certificate transfers with the property.
Option B: Heat Pump Exemption
If all units in the property already have an electric heat pump water heater or heat pump HVAC, your property may qualify for a full exemption. Submit the Home Energy Score through the BESO Portal with a $150 filing fee — no additional upgrades required.
Option C: Defer Upgrades to the Buyer
Both parties deposit $2,500 each (total $5,000) to the City via the BESO Upgrade Deposit Form. The buyer has 2 years to complete upgrades and earns a full $5,000 refund after submitting their Certificate of Compliance.
Costs and Available Rebates
BESO compliance doesn’t have to be expensive. Several rebate programs can significantly reduce your out-of-pocket cost.
| Path | Estimated Cost | Notes |
|---|---|---|
| Heat Pump Water Heater only (6 credits) | $3,000–$6,000 | Often $1,500–$3,000 after PG&E rebate |
| EV Charger + Induction Range + Attic Insulation (6 credits) | $3,000–$8,000 | Spread across smaller upgrades |
| Deferral (Option C) | $2,500 seller deposit | Non-refundable to seller; refunded to buyer |
| Heat Pump HVAC (6 credits) | $10,000–$20,000 | Adds significant home value |
Key rebate programs: PG&E Energy Upgrade Rebates (up to $1,000), IRA 30% federal tax credit on heat pumps, TECH Clean California, Switch Is On, and CHEERS. Search dsireusa.org for all Alameda County incentives.
BESO Timeline: How to Plan Your Sale
The most common mistake: starting too late.
- 4–6 weeks before listing: Schedule your Home Energy Score assessment. Assessors book 1–3 weeks out in busy seasons.
- 3–5 weeks before listing: Get contractor bids if completing upgrades. Fast upgrades (EV charger, induction range): 1–3 weeks. Heat pump water heater: 3–5 weeks. Heat pump HVAC or solar: 6–12+ weeks.
- 1–2 weeks before listing: Submit documentation via BESO Portal + $150 fee. City reviews in ~1–2 weeks.
- At listing: Home Energy Score must appear in MLS Property Notes. $500 fee for non-disclosure.
What BESO Means for Buyers
If you’re buying a home in Berkeley, BESO affects your transaction in one of two ways.
Scenario 1: Seller completed upgrades. The property comes with a Certificate of Compliance. Nothing more required — and you’re inheriting an energy-efficient home with lower utility costs.
Scenario 2: Seller deferred to you. You receive a $5,000 deposit held by the City, 2 years to complete qualifying upgrades, and the full $5,000 refunded once you submit your Certificate. A deferred property isn’t a liability — it’s an opportunity to choose upgrades that fit your priorities and rebate eligibility.
When evaluating a Berkeley property with deferred BESO, factor in the upgrade cost alongside the purchase. A heat pump water heater at ~$3,000–$6,000 is straightforward. A home that needs a full HVAC system plus electrical panel work is a different equation. We’ll help you model that before you make an offer.
Exemptions
- All-electric homes with no gas service and capped gas lines
- Heat pump exemption — all units have electric heat pump water heater or heat pump HVAC
- Income-qualified first-time buyers — enrolled in CalPLUS or MyHome programs
- Small buildings — under 850 sq ft
- Historic structures — National Register or local landmark
- Recent major upgrades — Energy Star score ≥75 or 10%+ documented energy improvement
To apply for an exemption, submit Form E to the City. Contact the BESO Helpdesk: [email protected] | (510) 981-7465.
Step-by-Step Compliance Process
Step 1: Get Your Home Energy Score. Hire a Registered BESO Energy Assessor before listing. Each unit in a multi-unit building requires a separate score. Cost: $300–$600 per unit. Valid for 5 years.
Step 2: Check Your Past Upgrades. Gather permits for work done in the past 5 years — heat pumps, insulation, panel upgrades, EV chargers. These count toward your 6 credits. You may already be compliant.
Step 3: Choose Your Path. Have 6+ credits? → Option A. Already have a heat pump? → Option B (exemption). Need more time? → Option C (defer).
Step 4: Submit and Get Your Certificate. Log in to the BESO Portal, upload documentation, pay the $150 fee. City reviews in ~1–2 weeks. The Certificate transfers with the property.
Step 5: Disclose in MLS. Include your Home Energy Score in the MLS Property Notes section before going live.
Frequently Asked Questions
Does BESO apply to my condo in Berkeley?
No. Condominiums and ADUs are explicitly excluded from BESO requirements.
What if I already have a heat pump — do I still need to do anything?
Possibly very little. If all units already have an electric heat pump water heater or heat pump HVAC, you may qualify for the exemption. You still need a Home Energy Score and $150 filing fee, but no additional upgrades are required.
Can upgrades my buyer makes after close count toward BESO?
Yes — that’s exactly what Option C (deferral) is for. The buyer has 2 years to complete upgrades and receive the $5,000 deposit refund.
What is a Home Energy Score and how much does it cost?
A standardized 1–10 rating from a Registered BESO Energy Assessor evaluating your home’s energy efficiency. Costs approximately $300–$600 per unit, valid for 5 years.
What’s the penalty for not having a Home Energy Score at listing?
A $500 non-compliance fee. Failure to include the score in the MLS is a separate violation.
Does BESO affect my property value?
Energy upgrades generally add value — particularly heat pump systems and solar. A BESO Certificate is becoming a standard expectation in Berkeley transactions. Properties that come fully compliant have one fewer friction point for buyers.
Where do I find a Registered BESO Energy Assessor?
The City of Berkeley maintains an approved list on their website. Contact the BESO Helpdesk: [email protected] | (510) 981-7465.
Navigating BESO? Let’s Work Through It Together.
The sellers we work with who plan ahead — even by 4–6 weeks — move through BESO cleanly and often turn the compliance work into a marketing advantage. Let’s map out your plan before you hit the market.
Use the BESO Calculator →
Talk to Robert
Robert Parker · 510.388.4154 · DRE# 01923837 | Josie George · 510.660.9668 · DRE# 01990905 | Compass Real Estate