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  2. Departments
  3. Permits, Approvals and Inspections
  4. Apply For a Permit
  5. Basement Alteration Permit

Basement Alteration Permit

An alteration permit is required:

  • For all commercial properties
  • To add one or more basement bedrooms
  • For basement excavations
  • To convert unfinished basement space into a finished space:
    • If structural changes are involved or moving a bearing wall.
    • If the property is located in a Flood Zone, Historic District or the Chesapeake Bay Critical Area. Use the Permit Review Tool to determine if the property is in a flood zone.
    • When plumbing, gas fitting and electrical work are required, trade permits must be pulled by a Master Plumber or Electrician licensed with Baltimore County.

A building permit is not required to convert unfinished basement space into a finished space if the above items are not involved.

If property is served by a well and septic system, a site plan must be provided that complies with the Ground Water Site Plan Requirements.

BUILDING GUIDELINES

 View an example of a typical wall section for an excavated basement.

Basement bedrooms must have egress windows with prescribed openings and latches or a door to the exterior.

ABOUT THE APPLICATION PROCESS

To learn more about the application process, read the steps and watch the videos below, or view the FAQ or full tutorial video playlist(link is external).

Watch a video to learn how to create your account(link is external) or follow the instructions below:

  1. Navigate to the online portal.
  2. Select the Create Account button.
  3. Enter your email address, select Submit.
  4. An email will be sent with a link to complete the account setup. (Note: If you don't see the email is not in your inbox, check the SPAM folder. If in SPAM, mark unread before selecting the link.)

Prepare/gather all required documents as indicated above to upload when completing your online application. Be sure to name the documents appropriately—file names must follow Baltimore County naming conventions.

Watch a video to learn how to create your application(link is external) or follow the instructions below:

  1. Enter the applicant and owner information.
  2. Select the property address and enter the contractor information. 
    1. In the Search and Add Contractors section, enter the contractor name in the search box.
    2. Select the contractor. The system will highlight the selected contractor in red.
    3. Select the Add button to select the contractor. The contractor will be listed in the Selected Contractors section.
  3. Describe proposed work.
  4. Answer all required questions and enter all information related to the project.
  5. Upload required documents. 
    1. After accepting the Terms and Conditions, the Document Upload window opens.
    2. On the Plan Documents tab, scroll down and select the Browse button to select your files.
    3. Highlight the files to be added, select Open. The files are added to the Upload Documents window. 
    4. For each file, select a discipline from the dropdown list to describe your uploaded document type. 
    5. Select the Upload button.
    6. A disclaimer pop-up appears. Approve the disclaimer by selecting the Yes button.
    7. Select the Submit for Review button.
    8. When all files have been submitted, close out the Document Upload window.
  6. Submit the application.

  1. Applications will be reviewed by the Permit Processing Staff. Watch a video to learn about the application review and revisions process(link is external). Staff may leave comments and  revisions required for your permit. To view comments, follow the below instructions:
    1. Navigate to the online portal. 
    2. Locate the permit on the My Dashboard page.
    3. Select the expand icon next to the permit. Select the Action (magnifying glass) icon, which opens the Permit Application Info page. There are two ways to view comments and revisions required for your permit:
      1. From the Plan Review section:
        • Select the Open Plan Review button.
        • From the Upload Documents screen, select the Review Documents tab
        • Download the documents for review. Review the comments and feedback letter, documenting the required updates. Review the markups of submitted plans and documents.
      2. From the Tasks section:
        • Scroll to the Tasks section. If there are comments for review, you will see an Action (magnifying glass) icon in the Comments field to the right of the task’s Date Completed field.
        • Select the magnifying glass to see the comments.
  2. If all required information and documents are submitted, the application will be completed and application fees will be calculated.
  3. Applicants will receive a notification that the fees are ready for payment. Watch a video to learn how to pay application fees(link is external) or follow the instructions below:
    1. Navigate to the online portal. The My Dashboard page displays.
    2. Select the Applications with Fees Due box at the top-middle of the My Dashboard window.
    3. Scroll to the My Fees section, find the permit number and scroll to the right to the Actions section. You will see a magnifying glass icon and a credit card icon.
    4. To view details for the fees, select the magnifying glass icon.
    5. To pay the fees, select the credit card icon. (Note: Baltimore County only accepts Mastercard, Visa and PayPal electronic payments.)
  4. Once payment is received, the application will be sent to all reviewing departments for technical review. Watch a video to learn about the review and revision process(link is external).
  5. Once the reviews are completed and approved, the permit will be issued.

Once the permit has been issued, the applicant will be notified via email. Watch a video to learn how to access the permit and approved plans(link is external) in the applicant portal. Permits and approved plans must be available at the job site for inspections.

All construction must be completed exactly as stated on the approved permit and approved construction plans. Watch a video to learn how to schedule inspections(link is external) through the applicant portal.

APPLY FOR A PERMIT

Once you have reviewed the process outlined above and have gathered your required documentation, apply for your permit online using the buttons below.

APPLY FOR A COMMERCIAL ALTERATION PERMIT 

APPLY FOR A RESIDENTIAL ALTERATION PERMIT 

Explore Permits, Approvals and Inspections

  • Apply for a Permit
  • Permit Application FAQ
  • Schedule an Inspection
  • Rental Registration
  • Code Enforcement
  • Zoning
  • Development Management

Contact Us

Department of Permits, Approvals and Inspections

County Office Building
111 West Chesapeake Avenue
Towson, Maryland 21204

Hours

Monday through Friday
8:30 a.m. to 4:30 p.m.

Phone

410-887-3900
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