General Contracting
Trade coordination, scheduling, permitting support, cost control and site leadership under one responsible contractor.
Explore general contracting →Ottawa, Illinois · Serving North-Central Illinois
Built to perform.
Managed to deliver.
Post frame expertise, commercial construction capability, and hands-on project leadership—from early planning through final completion.
Since 2018A15 locally owned
250,000+ SFBuildings constructed
One ContactScope to closeout
A broader construction partner
Built around the way your project actually needs to run.
A15 combines field experience with direct project leadership. We help define the scope, assemble the right trades, manage the details and keep the owner informed.
Commercial & Industrial
Practical construction solutions for owner-users, businesses, developers and facilities that need durable, functional space.
Explore commercial work →Preconstruction & Design-Build
Early budgeting, scope development, design coordination, constructability review and a clearer path to construction.
Explore preconstruction →
13+ YearsConstruction leadership experience
Led by Austin Decowski
Field knowledge with an owner's perspective.
A15 was built on real jobsite experience. Austin’s background spans post frame, wood and steel systems, concrete coordination, commercial interiors, crews, equipment, estimating and project delivery.
Locally owned in Ottawa
Direct owner involvement
Residential through light industrial
Clear scopes and documentation
Subcontractor coordination
Budget and schedule visibility
Selected work
Real projects. Built for real use.
Completed structures across north-central Illinois, from insulated shops to agricultural, storage and residential-use buildings.
A clearer process
Know what happens next.
One structured path replaces scattered quote forms and makes it easier to start at the right level of detail.
01
Project Conversation
We establish use, location, target budget, timing and major constraints.
02
Scope & Planning
We identify design needs, site questions, permitting and responsible trades.
03
Proposal & Schedule
You receive a defined scope, commercial terms and realistic project path.
04
Build & Closeout
A15 coordinates execution, communication, documentation and completion.
Have a project taking shape?
Tell us what you are planning. We’ll help determine the right next step.