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Berkeley · Independent guide with official links

Berkeley BESO and sewer lateral certificate questions when selling a house

Selling a house in Berkeley can involve separate questions about Building Emissions Saving Ordinance records and the City's Private Sewer Lateral program. This guide organizes the building-type, certificate, and official-source questions to check; it does not determine a property's status or choose a filing path.

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Site-wide source review checkpoint: . 62 registered sources were in that completed cycle; individual source records may be newer. Information may have changed since our last review. Verify current requirements and status directly with the responsible agency before relying on it.

A practical order of operations

Check the record before ordering work.

  1. 01
    Identify what to ask

    Use the property-type matrix only as a question prompt.

  2. 02
    Check existing records

    Open City-issued records and review the dates shown there.

  3. 03
    Confirm the official next action

    Use the responsible agency before hiring or relying on a deadline.

01

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Build a general question list

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Vacant land, no-structure parcels, unusual ownership, or mixed use: confirm the path directly with the responsible agency.

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Berkeley question list

Review this selected source-linked question set

Berkeley · Single-family home · Preparing to list

Planning context: Check existing certificates and agency records before scheduling assessments or work.

2 programs to verify

The selection changes which source-linked questions are shown. It does not determine whether a program applies to a property or transaction.

Berkeley · Single-family home · Preparing to list: 2 programs to verify. This is a general question list, not a property-specific determination.

Questions in this selected source-linked set

Open the record before ordering work.

Have these ready before opening an official portalProperty typeExisting certificates or permit recordsHOA or CC&Rs, if applicableCurrent transaction timing
  1. Question to verifyCity of Berkeley · BESO

    Building Emissions Saving Ordinance (BESO)

    Ask the responsible agency: Review the Home Energy Score and the City's upgrade, exemption, or deferral paths

    Use Berkeley's BESO portal to check the building record, then confirm the correct building category in the City instructions.

    Document to look for
    Home Energy Score or energy assessment plus the applicable City-approved BESO form, certificate, exemption, or deferral
    General responsibility context — confirm for this transaction
    Ask BESO and transaction professionals to confirm the seller and buyer roles for the building and transfer path
    Verify at the official source Verify in official instructions
  2. Question to verifyCity of Berkeley · Public Works

    Sewer Lateral Certificate

    Ask the responsible agency: Ask Public Works which transfer path to follow

    Search Berkeley's permit records for an existing sewer-lateral certificate before arranging testing or repairs.

    Document to look for
    City of Berkeley Sewer Lateral Certificate or City-approved transfer extension
    General responsibility context — confirm for this transaction
    Ask Public Works, the HOA when relevant, and transaction professionals to confirm responsibility for the property and transfer
    Verify at the official source Verify in official instructions

Supporting detail

Details, exceptions, and source trail

1
Question to verifyCity of Berkeley · BESO

Building Emissions Saving Ordinance (BESO)

Ask the responsible agency: Review the Home Energy Score and the City's upgrade, exemption, or deferral paths

Read details, exceptions, and sources

Bay Sale Ready summary of the linked official sources: Berkeley's published BESO materials state that, beginning January 1, 2026, the one- or two-unit path includes a Home Energy Score before listing, subject to the City's stated exclusions and exemptions. Ask BESO to confirm the building and transfer path.

Verify at official source: Time-of-Sale Energy Requirements for Small Residential Buildings · last reviewed by Bay Sale Ready August 1, 2026 Verify at official source: BESO Administrative Regulations, Version 5.0 · last reviewed by Bay Sale Ready July 18, 2026

Official sources · Individual Bay Sale Ready review dates shown below

Verify at official source: Time-of-Sale Energy Requirements for Small Residential Buildings · last reviewed by Bay Sale Ready August 1, 2026 Verify at official source: Time-of-Sale Energy Requirements for Multifamily and Commercial Buildings · last reviewed by Bay Sale Ready July 26, 2026 Verify at official source: BESO Administrative Regulations, Version 5.0 · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: BESO Compliance Guide for Small Residential Buildings · last reviewed by Bay Sale Ready August 1, 2026 Verify at official source: BESO Upgrade Deposit Form · last reviewed by Bay Sale Ready August 1, 2026 Verify at official source: BESO Refund Claim Form · last reviewed by Bay Sale Ready August 1, 2026 Verify at official source: BESO Portal · last reviewed by Bay Sale Ready July 18, 2026
2
Question to verifyCity of Berkeley · Public Works

Sewer Lateral Certificate

Ask the responsible agency: Ask Public Works which transfer path to follow

Read details, exceptions, and sources

Bay Sale Ready summary of the linked official sources: Berkeley's published Public Works materials describe a Sewer Lateral Certificate process tied to close of escrow or transfer of title and advise starting before listing. Ask Public Works to confirm the particular transfer and record.

Verify at official source: Private Sewer Lateral · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Private Sewer Lateral Compliance Guide · last reviewed by Bay Sale Ready July 18, 2026

Official sources · Individual Bay Sale Ready review dates shown below

Verify at official source: Private Sewer Lateral · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Private Sewer Lateral Compliance Guide · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Private Sewer Lateral permit application · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Private Sewer Lateral Certificate Application · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Private Sewer Lateral Verification Testing Guidelines · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Agreement for Time Extension to Obtain a Sewer Lateral Certificate · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Sewer Lateral Extension Deposit Form · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Claim for Refund of Money Paid · last reviewed by Bay Sale Ready July 18, 2026 Verify at official source: Berkeley Accela permit records · last reviewed by Bay Sale Ready July 18, 2026

Focused official-source guides

Open one official-source topic at a time.

These pages explain the records and questions to verify. They do not decide what applies to a particular property or transaction.

Berkeley BESO

BESO at time of sale: a building-type guide

Start with the building type and current City instructions before selecting an assessor or planning work.

Open focused guide
Berkeley PSL

Private sewer lateral: certificate questions

Check the City record and current process before relying on a certificate, extension, or closing timeline.

Open focused guide

Property-type matrix

One city, different starting questions.

Shared rows are grouped so the table shows only source-supported property-type differences. It publishes the same source-linked questions used by the browser-only question tool, not an official determination.

Berkeley home-sale questions by property type
Property typeBuilding Emissions Saving Ordinance (BESO)Sewer Lateral Certificate
Property types sharing this source-linked question set: Single-family home, DuplexHome Energy Score before listing; then review the City path
Verify at official source · last reviewed by Bay Sale Ready August 1, 2026 		Verify certificate and transfer path with Public Works
Verify at official source · last reviewed by Bay Sale Ready July 18, 2026
Property types sharing this source-linked question set: 3–4 unit propertyReview assessment before listing through 2027; new 1–4-unit phase starts in 2028
Verify at official source · last reviewed by Bay Sale Ready July 26, 2026 		Verify certificate and transfer path with Public Works
Verify at official source · last reviewed by Bay Sale Ready July 18, 2026
Property types sharing this source-linked question set: Condominium or townhomeReview the City's individual-unit exclusion; confirm unit and building scope
Verify at official source · last reviewed by Bay Sale Ready July 18, 2026 		Verify certificate and transfer path with Public Works
  • Berkeley's PSL requirement expressly includes condominiums, townhouses, and properties with shared laterals. Confirm responsibility with the HOA and Public Works.

Verify at official source · last reviewed by Bay Sale Ready July 18, 2026
Property types sharing this source-linked question set: 5+ unit or commercial buildingConfirm building category and path with BESO
Verify at official source · last reviewed by Bay Sale Ready July 26, 2026 		Verify certificate and transfer path with Public Works
Verify at official source · last reviewed by Bay Sale Ready July 18, 2026

Official starting points

Open official directories and review credentials independently.

Bay Sale Ready does not maintain or curate a provider list. These links open official agency resources and are not a recommendation, ranking, endorsement, or verification of quality, availability, price, insurance, or suitability. Bay Sale Ready does not match users, forward requests, negotiate, contract, supervise work, accept payment, or receive referral compensation.

02Berkeley BESO · multifamily/commercial

Use the building-type-specific assessor list

Choose the official list that matches the building. Verify any contractor needed for upgrade work separately from the assessor role.

Verify at the official source: Registered BESO Energy Assessors for multifamily and commercial buildings

Last reviewed by Bay Sale Ready

Verify at the official source: Time-of-Sale Energy Requirements for Multifamily and Commercial Buildings

Last reviewed by Bay Sale Ready

Official source register

Every published statement traces to a source.

Last completed registered-source review cycle: July 27, 2026 (62 sources in that cycle). Each source card shows its own review date, including newer additions. The responsible agency and its official materials control if anything differs from this summary.

Show all 19 reviewed official sources
City of Berkeley · BESO

Time-of-Sale Energy Requirements for Small Residential Buildings

Agency page; no publication date shown · Last reviewed by Bay Sale Ready August 1, 2026

Verify at the official source
City of Berkeley · BESO

Time-of-Sale Energy Requirements for Multifamily and Commercial Buildings

Agency page; no publication date shown · Last reviewed by Bay Sale Ready July 26, 2026

Verify at the official source
City of Berkeley · BESO

BESO Administrative Regulations, Version 5.0

November 1, 2025 · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · BESO

BESO Compliance Guide for Small Residential Buildings

Updated July 2026 · Last reviewed by Bay Sale Ready August 1, 2026

Verify at the official source
City of Berkeley · BESO

BESO Portal

Service linked by the City BESO pages · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source

This agency page may restrict direct access. Last manually reviewed .

City of Berkeley · BESO

Registered BESO Energy Assessors for multifamily and commercial buildings

May 20, 2026 · Last reviewed by Bay Sale Ready July 17, 2026

Verify at the official source
City of Berkeley · Public Works

Private Sewer Lateral

Agency page; no publication date shown · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · Public Works

Private Sewer Lateral Compliance Guide

Revised July 31, 2024 · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · Public Works

Private Sewer Lateral permit application

Revised November 15, 2024; verify filing instructions with Public Works · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · Public Works

Private Sewer Lateral Certificate Application

Revised October 21, 2025 · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · Public Works

Private Sewer Lateral Verification Testing Guidelines

Agency PDF; no revision date shown · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · Public Works

Agreement for Time Extension to Obtain a Sewer Lateral Certificate

Revised August 16, 2024 · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · Finance Department

Sewer Lateral Extension Deposit Form

Revised January 17, 2023 · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
City of Berkeley · Finance Department

Claim for Refund of Money Paid

Revised August 2019 · Last reviewed by Bay Sale Ready July 18, 2026

Verify at the official source
California Contractors State License Board

Check a contractor license

Agency online service · Last reviewed by Bay Sale Ready July 17, 2026

Verify at the official source

Frequently asked questions

Seller questions to verify with official sources

What BESO paperwork do I need when selling a Berkeley house?

For a single-family home or duplex, Berkeley's current page states that the seller gets a Home Energy Score before listing and then completes the City's upgrade, exemption, or buyer-deferral path before the sale is finalized. The exact record depends on the building and City-approved path, so confirm the current BESO portal record before relying on a document. Verify at the official source: City of Berkeley · BESO

How do I check whether a Berkeley property has a BESO assessment?

The City provides a BESO portal for researching available records. A portal label, empty result, or ambiguous entry does not establish the building's status, so confirm the search inputs and record meaning with BESO. Verify at the official source: City of Berkeley · BESO

This agency page may restrict direct access. Last manually reviewed .

Does Berkeley BESO apply to condos or multi-unit buildings?

Berkeley excludes an individually owned condominium unit within a larger building from its time-of-sale BESO requirement, while separate building-level questions may remain. Multifamily buildings follow different City instructions, so confirm the building record rather than treating an HOA or unit label as the whole answer. Verify at the official source: City of Berkeley · BESO

What does Berkeley BESO require for a triplex or fourplex before 2028?

Berkeley currently describes an energy assessment before listing for three- and four-unit residential buildings through 2027. The City says those buildings enter the one-to-four-unit time-of-sale framework starting January 1, 2028, so use the listing date and current BESO record when confirming the path. Verify at the official source: City of Berkeley · BESO

Do I need a Berkeley sewer lateral certificate to sell my house?

Berkeley's Public Works page ties the Sewer Lateral Certificate process to close of escrow or transfer of title and identifies limited exception and extension paths. This site does not decide whether a particular transfer falls within one of those paths, so confirm the current City record with Public Works. Verify at the official source: City of Berkeley · Public Works

How do I look up a Berkeley sewer lateral certificate?

Use the City record portal and current PSL instructions to research available certificate information. Treat a found, empty, or unclear result as a record-search outcome only and ask Public Works what it means for the property. Verify at the official source: City of Berkeley

Can a Berkeley sewer lateral extension be used at closing?

Berkeley describes a City-approved six-month transfer extension for certain cases and publishes separate agreement and deposit materials. The extension must be approved before closing; an application alone is not the issued approval. Verify at the official source: City of Berkeley · Public Works