Dallas County hears $3.31 million design-development estimate for auditor’s office renovation; work targeted to start Jan. 2027

On July 14, 2026, the Dallas County Board of Supervisors received Turner Construction Co.’s 100% design-development (DD) budget estimate for renovations to county auditor facilities at 100 Nile Kinnick Drive and 210 N. 10th Street in Adel. The Turner estimate lists a project amount of $3,307,996 and, after value-engineering, a construction estimate of roughly $2.96 million. Jamie A. Rochleau, senior project manager for Turner, delivered the written estimate and supporting MasterFormat cost breakdown to county staff.

County staff and the design team presented proposed site and floor plans that would add (among other features) a new early-voting vestibule, an accessible LULA elevator, improved public circulation and a secure ballots/archive room. The documents also mark alternates — optional adds that would increase the project cost — such as brick veneer ($124,599), high-density archival storage ($134,175), dry-chemical fire suppression options (two alternates totaling more than $255,000 across buildings), relocating the generator ($46,180) and adding the vestibule ($119,979).

The estimate timeline in Turner’s cover letter anticipates field work beginning in early January 2027 with approximately nine months of onsite construction and substantial completion targeted for late September 2027; Phase 1 (100 Nile Kinnick) owner occupancy is shown as early June 2027 and Phase 2 (210 N. 10th) as early September 2027 in the schedule provided to the board.

Turner’s materials note several drivers of the cost increase from earlier placeholders: a prior Turner DD estimate of about $4.043 million, asbestos-abatement work (removal of gypsum board and cabinetry) at one site, and added demolition and specialty work from redesigns. The Turner estimate explicitly excludes asbestos testing and abatement costs from the base estimate, flagging those as owner responsibilities or separate line items to be clarified before construction bidding.

County staff said the design-document and budget work will proceed toward the construction-document phase and bidder pre-approval steps later this year; Turner’s schedule anticipates issuing bidding documents in mid-September 2026. The project documents presented record value‑engineering options and owner-directed alternates that the board can choose to include or defer in future approvals.

The board did not adopt construction contracts at the meeting; the materials presented were the 100% DD deliverable and budget estimate for board review and next-step authorization.

Provenance: Presentation and Turner 100% DD estimate (Turner cover letter and MasterFormat breakdown).