A general contractor built around open-book construction.
Gilbane Building Inc is a Minnesota general contractor based in Brooklyn Park. We deliver tenant improvements, office and light industrial buildings, and multifamily projects of five units or more across the seven-county Twin Cities metro.
Our clients are building owners, developers, corporate facility teams and the architects they hire. They come to us for preconstruction, CM at Risk with a guaranteed maximum price, Design-Build, or hard-bid lump sum.
How we work
- 01
One accountable contractor
We hold the subcontracts, the schedule and the safety plan. You have one contract and one project manager who answers for all of it.
- 02
Numbers before signatures
Budgets are built from current subcontractor quotes, not last year's unit costs. Quotes older than 60 days are reconfirmed before a GMP or lump sum is signed.
- 03
Standard contracts
We work on AIA A101-2017 / A201-2017, AIA A401 for subcontracts, or ConsensusDocs 500 series for construction management. No custom forms that shift risk quietly.
- 04
A record you can hand to a lender
Pay applications follow AIA G702 / G703 with lien waivers attached, so your lender can verify progress and release draws without chasing paperwork.
Why owners can check us, not just trust us
Construction is a business of documents. We would rather give you the paperwork to verify our work than ask you to take our word for it.
Registered in Minnesota
Commercial contractors in Minnesota register with the Department of Labor and Industry under Minn. Stat. 326B.701. Our registration is included with every proposal and can be checked in the DLI iMS lookup.
Insurance and bonding on paper
A certificate of insurance and a project-specific bonding letter come with each formal proposal, before you are asked to commit.
Every bid visible
On open-book work you see each subcontractor bid, the leveling sheet and our recommendation, and buyout savings stay with the owner as reported.
Weekly reporting
Committed cost, forecast at completion, RFIs, change orders and a two-week lookahead every Monday, from mobilization through closeout.
What Twin Cities construction costs are doing
Minneapolis led the eight markets tracked in the Mortenson Construction Cost Index for Q2 2026 data, driven in part by annual union labor adjustments. Some large electrical equipment, such as transformers and high-voltage breakers, carries lead times beyond two years. We price escalation as a visible line, order long-lead items during preconstruction, and reconfirm stale quotes.
- Minneapolis nonresidential construction cost change, one quarter
- +2.86%
- National nonresidential cost change over 12 months
- +5.60%
- Electrical systems, largest single-quarter increase
- +3.4%
- Section 232 tariff on steel, aluminum and most copper products
- 50%
Sources: Mortenson Construction Cost Index, Q3 2026 report; Section 232 tariff rates effective April 6, 2026.