Commercial Division
Commercial Door, Dock & Access Solutions in Denver
For developers, general contractors, property managers, and facility teams. A third-generation specialist with 21 years on the tools — code-aware installation, plan review, and the trade knowledge to catch opening, dock, and access problems before framing.
COIs Provided to GCs & Owners
Plan Review & Submittals
Preventive Maintenance Contracts
A Commercial Door, Dock & Access Sub You Can Build Around
From warehouse and distribution to retail, hospitality, multifamily, and mixed-use — we install and service the openings that keep commercial buildings secure, sealed, and moving. We’d rather be brought in early than be the last sub on the schedule fixing problems that were locked in months ago.
Real Estate Developers
Consistent product standards across multi-property and multifamily portfolios.
General Contractors
A reliable door, dock & access scope that keeps the schedule moving.
Property Managers
Fast response and scheduled maintenance across your buildings.
Facility Teams
Uptime on docks, rolling steel, fire doors, and access systems.
Commercial Door, Dock & Access Capabilities
New construction, retrofit, and ongoing service for commercial properties across the Denver metro.
Commercial Door, Dock & Access Work Across Denver
Loading docks, rolling steel, fire doors, and security installs for warehouse, retail, and mixed-use properties across the Denver metro.
We Catch Opening Problems Before They Hit the Field
Door, dock, and access problems usually surface at the worst time — mid-construction, after the GC has moved on, or once a tenant is operating. A 15-minute plan review up front prevents the change orders and downtime that show up later.
Send drawings, an opening schedule, or a scope and we’ll flag clearance, coordination, code, and lead-time risks before framing.
Dock door not coordinated with leveler, restraint, or seal
Not enough headroom or backroom for the door and operator
Track conflicts with HVAC, sprinklers, piping, or lighting
Wrong fire-door rating or missing code documentation
Security product mismatched to the use case or traffic
Air infiltration and energy loss at openings and docks
Late lead-time surprises on rolling steel & high-speed doors
From Plan Review to Long-Term Service
A clear path that keeps your door, dock, and access scope coordinated, code-compliant, and on schedule.
Plan Review & Site Walk
We review drawings, opening schedules, and conditions to flag risks before framing.
Product Selection & Submittals
Right door, dock, and access products specified with submittals and lead times you can schedule around.
Coordinated Installation
Installed in sequence with the other trades, with COIs and documentation provided up front.
Commissioning & Maintenance
Tested, commissioned, and backed by optional preventive maintenance contracts.
Service Contracts That Keep Equipment Running
Scheduled maintenance on overhead doors, rolling steel, fire doors, dock equipment, and access systems reduces emergency callouts, extends equipment life, and helps keep fire-rated assemblies compliant. We tailor each contract to your equipment list and use pattern — and provide the documentation your insurer and code officials want to see.
Trusted Commercial & Industrial Door Brands
Trusted by Denver Commercial Owners & Builders
Verified Google reviews from real projects across the Denver metro.
We hired Sean and his team to install 4 garage doors on our 10,000 square foot tube steel building. Was referred to Sean by the steel building company we worked with. Couldn’t be happier with the result.
Very good work. Easy company to work with. Installation crew very professional and hard working. Would recommend to any neighbor or friend.
Sean made installing our new garage door seamless. His communication was excellent, and the project went smoothly from start to finish. Will definitely use again.
Project Consultation
Tell Us About Your Commercial Project
Loading dock package, rolling steel, fire doors, security grilles, gate & access, or a maintenance contract — send plans, an opening schedule, or a scope, and we’ll respond with a clear recommendation.
GC or developer?
Drop in drawings or specs. We review early so problems get caught before framing.
A real third-generation specialist answers Mon–Fri 6am–6pm and Saturday mornings.
Questions GCs, Developers & Owners Ask
Straight answers on scope, coordination, code, and service.
Do you work as a subcontractor for general contractors and developers?
Yes — that’s our preferred work. We act as the specialty door, dock, and access sub for commercial GCs and developers, provide COIs and safety documentation up front, and coordinate our scope with the rest of the trades to keep the schedule moving.
Can you review plans and submittals before we build?
Absolutely. Send drawings, an opening schedule, or a scope and we’ll flag clearance, headroom, operator coordination, fire-rating, and lead-time risks before framing. There’s no charge for early review on serious projects.
What loading dock equipment do you install and service?
Full dock packages — dock levelers, vehicle restraints, dock seals and shelters, bumpers, edge-of-dock systems, and dock doors (sectional, rolling steel, and high-performance). We handle new construction, retrofits, and ongoing service for warehouse, distribution, and industrial properties across the Denver metro.
Do you handle fire-rated doors and code compliance?
Yes. We install and service fire-rated rolling steel and swing assemblies, perform drop-testing, and provide the documentation code officials and insurers expect. We confirm the correct rating for the opening as part of plan review.
Do you offer preventive maintenance and service contracts?
Yes. We set up scheduled PM contracts covering overhead doors, rolling steel, fire doors, dock equipment, and access systems. Regular maintenance reduces emergency callouts, extends equipment life, and helps keep fire-rated assemblies compliant. Each contract is tailored to your equipment list and use pattern.
Are you licensed, bonded, and insured — and can you provide COIs?
Yes. 3rd Gen is fully licensed, bonded, and insured for commercial work across the Denver metro, with BBB A+ accreditation. We provide certificates of insurance, licensing documentation, and safety paperwork to GCs and property owners on request.
What are typical lead times on commercial doors?
Standard sectional and rolling steel doors often run 2–6 weeks; fire-rated, high-speed, and specialty products can run 6–12+ weeks depending on configuration. We confirm exact lead times at quote and build them into the project schedule so other trades coordinate cleanly.
What’s your commercial service area?
We serve commercial properties across the Denver metro — including Denver, Aurora, Lakewood, Arvada, Westminster, Centennial, Englewood, Littleton, Golden, and surrounding communities. Dispatching from Golden, we cover new construction, retrofit, and ongoing service throughout the region.
Now Booking 2026 Commercial Projects
Have a Commercial Project? Let’s Talk.
Loading dock package, rolling steel, fire doors, security grilles, gate & access, or a maintenance contract — send plans or share the scope and we’ll get back fast.
