Warehouse & Industrial Construction · Washington, DC & Maryland
Warehouse Construction Contractor in Maryland & Washington, DC
Sonny’s Renovations designs and delivers warehouses, distribution facilities, flex and industrial buildings as one design-build contract — engineering, permitting, site and foundation, steel erection, roofing and envelope, doors and docks, floors and offices. We don’t just sell the building. We deliver the project.
Licensed DC & MD • Insured • Veteran-Owned • Design-Build | (301) 648-3181
Kit vs. facility
A building kit is not a warehouse.
Search for a warehouse builder and most of what you’ll find are steel-building suppliers. They’ll quote you an engineered kit — frames, panels, trim and hardware on a truck — and the quote can look very attractive. It is only one component of the finished project.
Site development, foundations, erection, utilities, building systems, interiors, permitting and other project requirements can represent a substantial portion of the total investment. Someone has to grade the site, run the utilities, pour the footings and slab, stand the steel, seal the envelope, hang the doors and dock equipment, bring in power and lighting, finish the floor, build the offices, and get every inspection signed. That someone is a general contractor.
Sonny’s is the general contractor. We take the project from the first site walk to the day your forklifts roll in, under one contract, with one point of accountability.
Facility types we design and deliver
- Warehouses and distribution facilities
- Flex industrial buildings (office + warehouse)
- Storage facilities
- Light manufacturing and production buildings
- Fleet, equipment and maintenance buildings
- Commercial steel buildings and shops
- Additions to existing industrial buildings
- Contractor yards, cold-storage shells, and support structures
Most are delivered as pre-engineered steel buildings; conventional structural steel or hybrid systems where the program calls for it.
The process
How a warehouse gets delivered
- Program and siteClear height, bay spacing, dock count, truck court, office area, future expansion, power needs and use classification. We walk the site with you and look at zoning, access, stormwater and utilities before anyone draws a building.
- Design and engineeringBuilding design, site plan, and stamped structural, foundation and MEP drawings from licensed engineers. Pre-engineered building drawings are engineered to the site’s wind, snow and seismic loads and the local code.
- PermittingSite plan and building permit submissions with the county in Maryland or the Department of Buildings in DC, including stormwater management, grading, and use-and-occupancy reviews. We manage plan-review comments and revisions.
- Site development and foundationClearing, grading, stormwater, utilities, footings, piers, and the slab-on-grade specified for your loading — forklifts, racking and equipment pads included.
- Steel erectionPrimary and secondary framing, roof and wall systems, set by experienced erection crews and inspected as the building goes up.
- Roofing and building envelopeStanding-seam metal or membrane roofing (TPO, EPDM), insulation, wall panels, flashing and weatherproofing so the building performs for decades, not seasons.
- Doors, docks, systems and floorsOverhead and dock doors, levelers and seals, man doors, electrical service and lighting coordination, fire protection where required, and industrial floor finishes.
- Build-out and deliveryOffices, restrooms, break rooms and mezzanines; final inspections; closeout documents; certificate of occupancy.
Industrial buildings in the DC–Maryland market
What changes the cost and schedule of a warehouse here
Two warehouses with the same footprint can carry very different budgets. In Maryland and DC the drivers are usually the site, not the steel:
- Site and stormwater. Maryland’s stormwater management requirements and county grading permits often decide the schedule before the building does. Sloped or wooded parcels, poor soils and wetland buffers add time and cost.
- Utilities and power. Distance to water, sewer and adequate electrical service — especially for manufacturing or cold storage — can outweigh the building package.
- Clear height and span. Taller clear heights and long clear spans raise the steel weight and foundation size but pay back in racking density and flexibility.
- Docks, doors and floors. Dock count, levelers, floor flatness and load ratings, and floor finishes are where “kit” budgets fall apart.
- Office and support space. Conditioned office area, restrooms, and code-required accessibility and life-safety items scale the MEP scope.
- Jurisdiction. Permit paths differ across Prince George’s, Montgomery, Charles, Anne Arundel and Howard Counties and the District. We plan the submission around the jurisdiction you’re in.
We price from a takeoff of the actual drawings and site conditions, not a per-square-foot rule of thumb, and we’ll tell you where the budget risk is before you commit.
Explore the building first
Size the shell in 3D at SteelBuildUSA
SteelBuildUSA is our dedicated steel-building platform for exploring warehouse sizes, clear-span options, configurations, planning information and 3D design. Explore it, plan it, and configure it there — then bring it to Sonny’s to permit, found, erect and finish as a complete facility.
More than the shell
Roofing, envelope and floors that make the building usable
Roofing and weatherproofing are a major share of any industrial project, and the floor is what your operation actually runs on. Sonny’s installs commercial roofing systems and industrial floor coatings on the buildings we deliver and on the buildings you already own.
Project experience
Multi-Building Commercial Steel & Envelope Project — Laurel, Maryland
Building-envelope and accessory installation · Subcontractor to the general contractor · June–October 2025
On a larger commercial construction project in Laurel, Sonny’s Renovations was brought in after the primary structural steel frame had been erected to close in and finish the primary building and complete accessory work across the site. On the primary 50′ × 60′ × 20′ building, Sonny’s installed the exterior metal wall panels, metal roofing, two double-door assemblies, two personnel doors, gutters, downspouts and an approximately 25-foot canopy. Sonny’s also installed gutters and downspouts on two additional buildings and an additional door on one of them.
The defining challenge was site coordination: sequencing our work with the general contractor and other trades, meeting the site’s requirements, and moving crews across multiple structures without holding anyone up. It’s the same coordination discipline we bring to a full design-build warehouse, applied here to the envelope and accessory scope.
Scope shown is Sonny’s verified scope only. The building package, structural erection, site development, foundations, slabs and primary permits were provided by others.
Scopes this project demonstrates
- Exterior metal wall panels and building skins
- Metal roofing
- Commercial doors and openings
- Gutters and downspouts
- Canopy and overhang installation
- Multi-building, multi-trade site coordination
Questions owners and developers ask
Warehouse construction, explained
What does a warehouse construction contractor actually do?
A warehouse general contractor delivers the whole facility: pre-construction and budgeting, design and engineering coordination, permitting, site development, foundations, building erection, roofing and envelope, doors and dock equipment, trade coordination for electrical, plumbing, HVAC and fire protection, floors, offices, inspections and closeout. A steel-building supplier delivers the building package; the contractor delivers the project.
Do you build with pre-engineered metal buildings or conventional steel?
Both, depending on the program. Pre-engineered steel buildings are usually the fastest and most economical route to a clear-span warehouse, shop or distribution building. Conventional structural steel or hybrid framing makes sense for unusual loads, multi-story programs, or where an architect’s design requires it.
Can Sonny’s handle the site work and foundation, not just the building?
Yes. Site development, stormwater, utilities, footings, piers and slabs are part of the design-build contract. That’s the difference between buying a building and getting a warehouse.
Who handles permits for a warehouse in Maryland or DC?
We do. Site plan, grading and stormwater approvals, building permits, and use-and-occupancy reviews with the county (Prince George’s, Montgomery, Charles, Anne Arundel, Howard and others) or with the District’s Department of Buildings.
How long does warehouse construction take?
It depends on the site, the size, and the jurisdiction’s plan-review times more than on the building itself. Site approvals and permitting are often the longest stretch; steel erection is usually the fastest. We build a schedule around your site and jurisdiction during pre-construction rather than quoting a generic number.
Can you expand or add to an existing industrial building?
Yes. Additions to existing warehouses and shops, new dock positions, mezzanines, office build-outs inside existing shells, and roofing and floor upgrades to buildings you already operate.
Where does Sonny’s build warehouses?
Maryland — statewide for commercial and industrial projects, with our base in the Washington, DC metro — and Washington, DC. Sonny’s Renovations LLC is a licensed general contractor in DC and Maryland.
Planning a warehouse or industrial building?
Bring us the site, the program, or the kit quote you already have. We’ll show you what the finished facility takes.
