Cook County is not one construction market — it’s 126 municipalities plus a substantial stretch of unincorporated land, each with its own building department, permitting process, and in most cases its own local code amendments. A project in Evanston, Oak Park, and unincorporated Cook County a few miles apart can face three different reviewers and three different timelines, even though every one sits inside the same county line.
A number that works in Chicago proper, or treats the county as one uniform jurisdiction, misses that fragmentation — and misses the one place the county actually does regulate uniformly: stormwater. Estimates built on assumptions borrowed from the city or a single suburb surface later as change orders, permitting delays, or a missed tax incentive that would have changed the project’s economics.
Mega Estimating prices Cook County on what the county, the municipality, and the Metropolitan Water Reclamation District actually enforce, grounded in RSMeans and Craftsman cost data and localised to current Cook County trade pricing. We work with general contractors, subcontractors, developers, architects, and lenders.
126 municipalities means 126 permitting processes.
Most of Cook County’s cities and villages run their own building department, adopt their own code amendments, and set their own review timelines. A developer working several suburban sites at once is really managing several distinct regulatory relationships, not one countywide system.
Unincorporated land answers to the county directly.
Property outside any municipal boundary falls under the Cook County Department of Building and Zoning, which handles permitting, inspections, and zoning certification the way a municipality would elsewhere — a meaningfully different process from working inside an incorporated suburb.
Stormwater is the one thing regulated countywide.
Since 2014, the Metropolitan Water Reclamation District’s Watershed Management Ordinance has set uniform detention, floodplain, and volume-control requirements across all of Cook County, regardless of municipality. Most municipalities are authorized to issue WMO permits directly, but certain project types still route through MWRD itself, and getting that routing wrong costs time.
Property tax incentives can decide whether a project pencils.
Cook County’s Class 6b and Class 8 incentive programs cut the assessment level on qualifying industrial and commercial property by 50–60% for a decade or more. New construction, substantial rehabilitation, and reoccupied vacant buildings can all qualify, but every application needs municipal support and a formal filing — often the difference between a warehouse or manufacturing project being feasible or shelved.
The county spans wildly different labor and market conditions.
Cook County includes dense union-heavy Chicago, affluent North Shore suburbs, working-class south suburbs, and large stretches of forest preserve and unincorporated land. Prevailing wage still applies countywide on publicly funded work, but private-market labor cost and construction demand vary meaningfully by sub-region
Much of the housing stock is older and inner-ring.
Many Cook County suburbs built out in the early-to-mid 20th century, and renovation, addition, and system-replacement work on that stock carries different code-compliance surprises than new construction on greenfield sites.
Each factor is built in and supported by current market pricing — how we hold 95–98% accuracy across our projects.
Mega Estimating supports general contractors, subcontractors, developers, architects, and lenders at every stage:
We also provide budget and preliminary figures to support financing before drawings are finalised, plus submission-ready bid estimates and material takeoffs across every CSI trade.
Standard turnaround is 3 to 5 business days, using PlanSwift, Bluebeam, and Trimble. Rush service is available in 24 to 48 hours.
We price across Cook County — the North Shore, the western suburbs, the south suburbs, and unincorporated Cook County. Building somewhere not named here? Reach out regardless; we can typically price it.
Sitework and drainage answer to the countywide Watershed Management Ordinance regardless of municipality, with detention and volume-control requirements built into nearly every site plan. Structure and foundations follow the same soft-clay-and-glacial-till geology as Chicago itself, though building heights and foundation types skew lower outside the urban core. Renovation-heavy trades — electrical, mechanical, and structural repair — recur often given the county’s older suburban housing and commercial stock.
Every project starts with identifying the correct jurisdiction: an incorporated municipality’s own building department, or the Cook County Department of Building and Zoning for unincorporated land — and each has its own submittal requirements and timeline.
Stormwater review under the MWRD Watershed Management Ordinance runs alongside that, either through a municipality authorized to issue WMO permits or through MWRD directly for larger or more sensitive projects. Any project pursuing a Class 6b or Class 8 tax incentive needs municipal board support filed early, since it’s a separate approval track from the building permit itself.
These reviews run concurrently and add time, which we factor into our scheduling assumptions.
Mega Estimating is a professional cost estimation consultancy specializing in providing detailed construction cost estimates, Our cost consultants provide our clients.