Opening a business that runs out of warehouse space in Rockville usually means working with three levels of government: the City of Rockville or Montgomery County (depending on your address), Montgomery County for some licenses, and the State of Maryland. This guide maps which office handles what, based on the offices’ own published guidance as of November 2026.
General information, not legal advice
Rules and forms change, and your exact requirements depend on your business activity and address. Confirm every step with the office named here, or with an attorney or accountant, before you sign a lease or open.
Step one: confirm who has jurisdiction
A Rockville mailing address does not always mean the property is inside the City of Rockville. That matters because the City runs its own permitting.
- Inside city limits: the City of Rockville issues building and trade permits through its Inspection Services Division, part of the Community Planning and Development Services Department. Applications go through the City’s MGO Connect portal.
- Outside city limits (unincorporated Montgomery County): permits come from the Montgomery County Department of Permitting Services (DPS). DPS states plainly that it does not issue building permits for the Cities of Rockville or Gaithersburg.
If you are unsure which side of the line an address falls on, call the City’s Inspection Services Division at 240-314-8240 or email permits@rockvillemd.gov.
| What you need | Inside the City of Rockville | Unincorporated Montgomery County |
|---|---|---|
| Building and trade permits | City of Rockville Inspection Services Division | Montgomery County DPS |
| Approval to occupy the space | City commercial occupancy permit | DPS Use and Occupancy (U&O) certificate |
| Zoning check for your use | City zoning review | County zoning review through DPS |
| Business entity and trade name | Maryland Business Express (SDAT) | Maryland Business Express (SDAT) |
| Trader’s license, if you resell goods | Clerk of the Circuit Court for Montgomery County | Clerk of the Circuit Court for Montgomery County |
Occupancy permits inside the City of Rockville
The City lists a commercial occupancy permit application alongside its building and trade permits. City building code amendments posted by Rockville state that when a commercial or industrial space changes tenants, or a business changes ownership, the new occupant must apply for a certificate of occupancy. Fire and life safety violations must be fixed before it is issued.
Rockville’s zoning rules have also required zoning review of occupancy permits for any new use, change of use, or structural alteration. A new City Zoning Ordinance took effect on August 1, 2026, so ask the City which use category fits your business under the current code. Warehousing, light industrial, and wholesale are separate categories in the new ordinance.
If you plan fit-out work, the City requires permits for electrical, plumbing, mechanical, and structural work, and most permits need inspections before they close. A commercial interior renovation or a new commercial tenant with no change of use may qualify for the City’s Quick Start Program, which allows some limited interior work to begin while full plan review continues.
Use and Occupancy outside city limits
In unincorporated Montgomery County, DPS requires a Use and Occupancy (U&O) certificate before a building or space may be occupied. According to DPS:
- The certificate is issued after the space passes final building, electrical, mechanical, and fire inspections.
- Each different use in a building needs its own certificate.
- The application includes a floor plan and a site plan showing a parking analysis, unless the property is in a public parking lot district.
- A zoning official must approve the site for the intended use.
- The certificate stays valid until the use changes or the floor area increases or decreases.
DPS also publishes a U&O research map you can use to look up a property’s existing certificates.
State registration and the trader’s license
Most businesses start with the state, regardless of address. Montgomery County’s step-by-step guide and REDI both point to the same order:
- Register your business entity and trade name through Maryland Business Express, run by the State Department of Assessments and Taxation (SDAT).
- Apply for a federal Employer Identification Number (EIN) with the IRS once the state approves your registration.
- Open Maryland tax accounts, including sales and use tax if it applies, with the Comptroller’s combined registration.
- Get any state or local licenses your activity requires.
If you buy and resell goods, such as an online store holding inventory, you will likely need a Maryland trader’s license from the Clerk of the Circuit Court. The Montgomery County Circuit Court says it is your duty to determine which license your business needs, and the clerk relies on the information you provide. For questions, it refers businesses to the State License Bureau at 410-260-6240. The same page lists a separate state license category for storage warehouses, so ask about it if you plan to store goods for other people for pay.
Some trades need their own licenses, too. Contractors, food businesses, and other regulated activities should check with the Maryland Department of Labor and, for food, Montgomery County Health and Human Services. If your business is trades-based, our Rockville contractor storage guide covers space needs.
Free local help
You do not have to work this out alone:
- Rockville Economic Development, Inc. (REDI) helps new Rockville businesses with planning, registration, and permit questions. Its staff can be reached at (301) 315-8096.
- Montgomery County Business Center offers a Small Business Navigator and Business Liaisons, and connects owners with county-funded partners that provide no-cost consulting.
- Montgomery County Economic Development Corporation (MCEDC) helps with site selection across the county.
Where WareSpace fits
An all-inclusive unit does not replace your own business registration or licenses. WareSpace’s Acceptable Use Policy governs which activities are allowed in its units, so review it and describe your planned work before you sign. When leasing opens, ask the Rockville team which approvals the building holds and which your business needs on its own.
Budgeting for the space itself? Our Rockville warehouse costs guide compares market asking rents with the full monthly bill.
Coming soon in Rockville
Plan your Rockville move early
Join the Founders List for building, unit, and opening updates.
Join the Rockville Founders List
WareSpace Rockville is coming soon to 2800 Tower Oaks Blvd. WareSpace offers all-inclusive small private warehouse units from $1,000/mo on 6 to 12 month terms, and Rockville details will be confirmed before opening. Join the Founders List on the WareSpace Rockville page to hear first, and use the time to line up your registration and licenses.
Sources
- City of Rockville, Apply for a Building or Trade Permit, accessed November 3, 2026
- City of Rockville, Ordinance 22-19, Chapter 5 building code amendments, posted October 2025
- City of Rockville Zoning Ordinance, effective August 1, 2026
- Montgomery County DPS, Commercial Use and Occupancy Certificate, accessed November 3, 2026
- Montgomery County DPS, Commercial New Building Permit Process, accessed November 3, 2026
- Montgomery County Circuit Court, How Do I Get a Business License?, accessed November 3, 2026
- Montgomery County, Step-by-Step Guide to Starting a Business, accessed November 3, 2026
- Rockville Economic Development, Inc., New Business, accessed November 3, 2026
- Longman & Van Grack, New Business Checklist: Rockville and Montgomery County, September 2025
