ApplyingBuilding Permit applications are completed online. Please go to the ePermits Online Portal and enter the information directly into the County’s Permitting System.
Plans and Drawings RequirementsThe following are required when applying for an Addition Permit:
- Site/Plot Plans — Indicate the location
- Structural and Architectural Drawings
Addition and alteration construction is a miscellaneous grouping of home improvement and renovation projects generally geared toward enhancing an existing principal structure. Exterior and interior additions/alterations fall into this category. There are numerous home improvement projects within this classification, some of which may require multiple permits.
Residential AdditionsResidential additions can extend outward or upward from the existing structure. They are extensions of your living space. Living areas can often be altered or created through renovations to an existing structure without the benefit of outward physical expansion. For example, a basement can be finished as a family recreation room and/or den, or it can be divided and partitioned to create an additional bedroom.
In order to perform new construction or to alter an existing structure, one must obtain a building permit and submit site plans showing existing and proposed structure location(s), including well and/or septic (if applicable). Structural plans are also required.
Electrical WorkElectrical work for additions or alterations of existing dwellings requires an application for an Electrical Permit by a Master Electrician licensed by the State of Maryland.
Health & PlumbingAdditionally, the Health Department’s Division of Environmental Health checks to ensure that the existing septic system is sized adequately for any proposed increase to living area(s), where applicable.
Like electrical work, the installation of plumbing or natural gas piping requires an application by a Registered Master Plumber/Gasfitter licensed by WSSC. Generally, the installation of plumbing by homeowners is not permitted. Installation of natural gas piping and appliances by an entity other than a Registered Master Gasfitter is strictly prohibited.
For sprinklered homes, all additions (including sunrooms and patio enclosures) must be protected by an automatic sprinkler system in accordance with NFPA 13D.