To: Board of Supervisors
Department or Agency Name(s): Sonoma County Public Infrastructure
Staff Name and Phone Number: Johannes J. Hoevertsz, 707-565-2550
Vote Requirement: Majority
Supervisorial District(s): Countywide
Title:
Title
Sonoma County Transit Depot (SCTD) Roof & HVAC Repairs
End
Recommended Action:
Recommended action
A) Award the construction contract to Arntz Builders, Inc., in the amount of $1,100,231, for the Sonoma County Transit Depot Roof & HVAC Repairs Project (21CP34252AA), and authorize a contingency up to 15% of the contract amount, in the amount of $165,035 for a total amount of $1,265,226.
B) Authorize the Director of Public Infrastructure to execute the construction contract and any other related or required documents, in form approved by County Counsel.
C) Adopt and approve the plans and specifications for the project.
end
Executive Summary:
Sonoma County Public Infrastructure (SPI) is requesting Board award of a construction contract to Arntz Builders, Inc., for repairs and improvements to the roof and HVAC systems at the Sonoma County Transit Depot, located at 355 W. Robles Ave., Santa Rosa, CA 95407. The existing facility has experienced recurring water intrusion that requires corrective work to protect the building and maintain safe and reliable Transit operations. The proposed contract amount is $1,100,231, with a 15% project contingency of $165,035.
Discussion:
The Sonoma County Transit Depot, located at 355 W. Robles Avenue in Santa Rosa, is the central base for Sonoma County Transit’s administration, operations, and vehicle maintenance. The facility supports the staff, repair shops, maintenance activities, and fleet storage needed to deliver public transportation throughout the County. The Transit facility was constructed in 1983, making it approximately 43 years old. Maintaining the building is necessary to protect this public investment and support reliable daily operations.
The facility also supports the County’s transportation response during emergencies. Sonoma County Transit’s Board-approved Zero-Emission Bus Rollout Plan notes that the agency is often called upon to provide shuttle service during wildfires, floods, and other disasters. Maintaining a dependable operations and maintenance base therefore supports both routine transit service and the agency’s ability to respond when emergency transportation is needed.
Roof rehabilitation has been identified as a capital need for several years. A March 13, 2018, Board report identified a State of Good Repair funding request for rehabilitation of the Sonoma County Transit Operations Facility roof. This earlier proposal reflects the long-standing need to invest in the condition and continued use of the existing Transit facility. The current project addresses the water-intrusion conditions described below.
Staff have reported recurring water intrusion in recent years, with damage to ceilings, wallboard, carpeting, office furnishings, and equipment. These conditions create an ongoing maintenance burden and expose the County to additional repair costs if water entry continues. Continued moisture exposure can also interfere with the use of affected work areas and accelerate deterioration of building materials. The proposed repairs are intended to address the source of the water intrusion, reduce repeated damage, and help maintain safe and usable work areas for Transit employees.
The proposed work includes repair of the building’s roof system and skylights to reduce further water intrusion. Completing these repairs will help protect interior finishes and equipment and preserve the usefulness of the existing facility. The work will be performed in accordance with the project plans and specifications.
Interactive Resources was retained in February 2026 to provide architectural and engineering services, including site and project assessment, schematic design, construction document preparation, bid support, and construction administration.
An invitation to bid was posted on the County’s Purchasing Portal on August 20, 2026. Seven bids were received and publicly opened on September 29, 2026. Five bids were deemed responsive and two were deemed nonresponsive. The responsive bids were:
Arntz Builders, Inc. - $1,100,231
CWS Construction - $1,365,000
Rubicon Builders - $1,779,000
Kirby Construction - $1,955,000
Buhler Commercial - $2,216,608
Arntz Builders, Inc. was determined to be the lowest responsible bidder. Staff recommends awarding the construction contract to Arntz Builders, Inc.
Strategic Plan:
This item directly supports the County’s Five-year Strategic Plan and is aligned with the following pillar, goal, and objective.
Pillar: Resilient Infrastructure
Goal: Goal 1: Invest in County buildings and technology to enhance service delivery and improve employee mobility
Objective: Objective 1: Design or retrofit County facilities to be carbon neutral, zero waste and incorporate resilient construction techniques and materials.
Racial Equity:
Was this item identified as an opportunity to apply the Racial Equity Toolkit?
No
Prior Board Actions:
None
Fiscal Summary
|
Expenditures |
FY 26-27 Adopted |
FY 27-28 Projected |
FY 28-29 Projected |
|
Budgeted Expenses |
$ 1,265,266 |
|
|
|
Additional Appropriation Requested |
|
|
|
|
Total Expenditures |
$ 1,265,266 |
|
|
|
Funding Sources |
|
|
|
|
General Fund/WA GF |
|
|
|
|
State/Federal |
$ 1,265,266 |
|
|
|
Fees/Other |
|
|
|
|
Use of Fund Balance |
|
|
|
|
Contingencies |
|
|
|
|
Total Sources |
$ 1,265,266 |
|
|
Narrative Explanation of Fiscal Impacts:
Sufficient appropriations are available in the FY2026-27 Transit Article 4 - Capital Adopted Budget (41401-34040102) to fund the contract amount of $1,100,231, plus a 15% contingency of $165,035, for a total authorized amount of $1,265,266.
Narrative Explanation of Staffing Impacts (If Required):
None
Attachments:
1 - Agreement
2 - Project Manual
3 - Drawings
Related Items “On File” with the Clerk of the Board:
None