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Contractor Prequalification

To qualify for bidding on capital improvement contracts in excess of $25,000, it is usually necessary that each bidder be pre-qualified with the Department of Public Works and Transportation (DPWT). A pre-qualified bidder is a contractor who has received a certificate of prequalification from DPWT. A contractor must apply for prequalification by submitting the necessary form and information to DPWT for approval. The contractor's prequalification must be approved at least 10 County business days prior to the date specified for opening of bids. Please submit completed applications to:

Division of Construction Contracts Administration
111 West Chesapeake Avenue, Room 300 B
Towson, Maryland 21204

Baltimore County has created a Small Business Purchase Program (SBPP) that may be helpful to those interested in working on County projects.

Contractors requesting to have an additional category of work added to their prequalification certificate do not need to fill out a new application. Please email this request to

DPWT is no longer requiring Reference Inquiry Forms as part of the prequalification process.

Qualified bidders may download contract documents for current solicitations projects. Bidders are directed to submit a bid on the required bid forms and include the required bid deposit in the form of a bid bond in the amount indicated in the contract solicitation documents. A payment bond and performance bond is required on all projects in excess of $25,000 in the amount of 100 percent of the contract price.

In addition to bidding on capital projects, contractors must also be prequalified to construct public infrastructure on development projects via UA0/RA0 agreements, i.e., County right-of-way projects.

Once issued, prequalification certificates are valid for three years. View the list of prequalified contractors (PDF).

Send an email to or call 410-887-3531.

The following documents are in PDF format and open in a new window. New contractors need to download all three PDF files below.

Revised June 24, 2022         


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