GROUNDWORK Public-construction intelligence · Delaware
DELAWARE · BUILDING CATEGORY

Delaware certified small & diverse building contractors

The firms a prime can hire to meet the small-business and supplier-diversity goals on public work — New Castle County sets a 32% small-business participation goal on projects like the new library. Every firm here is certified by the state Office of Supplier Diversity in the Building category.

108
certified building firms
also Small-Business-First certified
OSD
Office of Supplier Diversity
Sep 3 2026
directory pulled
COMPANYPRIMARY CONTACTPHONECERTIFICATIONCERT. NO.

Verify current status before you rely on a listing. Delaware OSD certifications run on a three-year cycle and can lapse; this page is a dated snapshot, not a live feed. Confirm a firm’s current certification — and its specific designation (minority-, women-, veteran-, service-disabled-veteran-, or disability-owned) — on the official directory before counting it toward a bid goal. For New Castle County’s SBE program specifically, confirm eligibility with the county’s SBE coordinator.
Bidding a job with an SBE participation goal?
GOODFAITH is free: shortlist firms from this directory, log each solicitation as it happens, track participation against the contract goal, and produce an evidence record covering New Castle County’s nine good-faith criteria. No signup, nothing uploaded. https://goodfaith.pages.dev
Certified, and want primes to find you first? A featured slot puts your firm in the marked block at the top of this page for twelve months, $49. We check the certification number you enter against this directory before it appears, and refund in full if your firm is not currently certified. It buys position in that block and nothing else — the 108 listings below never reorder, and no row here is ever sold.
CLAIM A FEATURED SLOT — $49/YEAR →

How to read this

Why certified firms matter

Delaware public projects carry small-business and supplier-diversity participation goals — the Newark Library packs set a 32% small-business goal. Primes meet those goals by subcontracting to certified firms, or by documenting a good-faith effort to. This is the pool they draw from in the building trades.

OSD and SBF

OSD is certification by the state Office of Supplier Diversity, which certifies minority-, women-, veteran-, service-disabled-veteran-, and disability-owned businesses. SBF is Delaware’s Small Business First program. A firm may carry both. The specific OSD designation lives on each firm’s profile in the official directory.

Primary source only

Every firm here was pulled directly from the Office of Supplier Diversity’s public directory, Building category, on the date shown. Names, contacts, and numbers are reproduced as the state lists them. Nothing is added or inferred.