A conceptual cost estimate is a preliminary, rough estimate of a project’s total cost generated at the very beginning of a project planning phase, when design details are limited and based heavily on assumptions. A conceptual cost estimate is generally used to evaluate the feasibility of a project before detailed design work is completed, often providing only a rough order of magnitude for the overall cost. Due to its early nature, a conceptual estimate is considered less precise than later estimates, with a larger margin of error.
Large projects like the Oak Park Municipal Campus project are generally completed in five (5) phases, depending on the chosen construction project delivery method. They are: schematic design, design development, construction documents, bidding, and construction administration. Value engineering is a systematic method used to maximize the value of a project by reducing costs (by utilizing less expensive materials or methods) without sacrificing performance.
Value engineering typically takes place at the completion of the schematic design phase and again during design development, as this is when making changes and exploring alternatives has the least impact on the project schedule and allows for the most potential cost savings. It’s usually done as a team effort, with subject matter experts and project stakeholders working collaboratively to accomplish project goals.
The following links contain conceptual cost estimates that the Village of Oak Park has received for various project options throughout the feasibility phase of the Oak Park Municipal Campus project.
2019 Police Department Space Needs Assessment (FGM)
To build a new police station, the assessment provided the following information in 2019 (page 4):
| Build a New Police Station |
|
|
| Item |
Low |
High |
| Construction Budget |
$38,289,921 |
$40,204,417 |
| Owner Purchased Items (FF&E, etc.) |
$1,046,000 |
$1,208,000 |
| Fees and Soft Costs |
$2,898,845 |
$3,111,287 |
| Owner Contingency |
$394,484 |
$431,929 |
| Total Project Budget |
$42,629,251 |
$44,955,633 |
2023 Updated Police Department Space Needs Assessment (FGM)
To repair and/or correct deficiencies identified in the report in basement areas occupied by the Police Department, the assessment provided the following information in 2023 (page 1):
| |
Low |
High |
| Construction Budget |
$8,900,000 |
$14,200,000 |
| Soft Costs and Fees |
$960,000 |
$1,500,000 |
| Total Project Budget |
$9,860,000 |
$15,700,000 |
To repair and/or correct deficiencies in existing building occupied by Village Hall (not addressing space issues) ,the assessment provided the following information in 2023 (page 2):
| |
Low |
High |
| Construction Budget |
$13,000,000 |
$15,200,000 |
| Soft Costs and Fees |
$1,300,000 |
$1,600,000 |
| Total Project Budget |
$14,300,000 |
$16,800,000 |
Options:
- Build Addition for Police on Existing Site and Renovate the Basement
- Build New Police Station on New Site (does not include land acquisition or existing building basement renovation)
- Build New Police Station Elsewhere and Renovate Village Hall on Existing Site (does not include land acquisition)
- (3a) Build New Police Station Elsewhere and Rebuild Village Hall on Existing Site (does not include land acquisition)
- (4) Rebuild Village Hall and Police Station on Existing Site
Total Budget Summary of Options:
| |
Low |
High |
| Option 1 |
$75,400,000 |
$77,800,000 |
| Option 2 |
$66,900,000 |
$69,500,000 |
| Option 3 |
$118,800,000 |
$124,200,000 |
| Option 3a |
$122,800,000 |
$132,100,000 |
| Option 4 |
$132,800,000 |
$138,100,000 |
Historic Preservation Planning and Study Report (JLK)
The scope of this feasibility study limited JLK's review to the existing Village Hall building. Therefore, conceptual costs only include desired renovations to the building without evaluating improvements to the site or the addition of a new standalone facility for the police department.
The Facility Review Committee selected Scheme 2 as the preferred design scheme during Phase II, which presented a compatible south addition that would serve as an orientation hub for Village Hall. During Phase II it was also indicated that the existing Council Chamber function should be relocated to accommodate additional need for Council space and functionality.
- Scheme 2a - Larger Addition, Council Chamber Hub: $54.5-$57 million
- Addition serves as visitor and staff orientation point and hosts new relocated Council Chambers.
- Existing Council Chambers is repurposed into multi-function room with new elevator.
- Scheme 2b - Smaller Addition, Orientation Hub: $47.5-$49.5 million
- Addition serves as an orientation and circulation tower for visitors and staff and is sized to accommodate public-facing Village Hall functions, restrooms, small conference rooms, stair and elevators.
- Existing Council Chambers is repurposed into multi-function room with new elevator.
- New Council Chambers are located in either room 101 or lower-level public common area.