Howard County, Maryland requires a building permit for construction countywide, issued through the Department of Inspections, Licenses & Permits1. The County Council has zoned the entire county into districts, so what you can build and where depends on your parcel's zoning district2. If your land is not on public sewer, the Howard County Health Department, not the state, is the approving authority for your septic system3.
At a glance
- Building permit
- Required countywide, issued by the Department of Inspections, Licenses & Permits14
- Zoning
- Countywide zoning districts set by the County Council25
- Septic permit
- Required; Howard County Health Department is the approving authority36
- Well permit
- Required statewide; Howard County's fee is $1607
- Owner-builder exemption
- Yes, for alterations/additions to your own primary residence89
- Manufactured/modular homes
- Allowed in any zone permitting single-family use, once titled as real property10
- Driveway permit
- Free, but required if you change the driveway footprint11
Who to call
Building permits
Howard County Department of Inspections, Licenses & Permits (DILP)
Building permits, plan review and construction inspections countywide, including for the New Town District
3430 Courthouse Drive, Ellicott City, MD 21043
Planning & zoning
Howard County Department of Planning and Zoning
Zoning administration, subdivision review, and land-use planning countywide
3430 Court House Drive, Ellicott City, MD 21043
Septic permits
Howard County Health Department, Bureau of Environmental Health
Reviews and permits well and septic system installations and repairs, and administers Maryland's delegated onsite sewage disposal program for Howard County
8930 Stanford Blvd, Columbia, MD 21045
Contact details are copied from each office’s official page and were checked against it on September 24, 2026.
Do you need a building permit in Howard County, Maryland?
Yes. A building permit is required for construction everywhere in Howard County, including in the New Town (NT) Zoning District that covers Columbia, an unincorporated planned community112. Homeowners of one- and two-family dwellings may act as their own general contractor for alterations and additions if they own the property and it is their primary residence; if the home is a rental or not your primary residence, Maryland law requires a licensed Home Improvement or Home Builders contractor instead89. Howard County is one of the Maryland counties that sits outside the state's general county building-authority statute, so its permitting power comes from its own charter and code rather than that statute13. Once construction is done, a final Use and Occupancy certificate is required before you can use or occupy the building, a requirement Maryland sets as a statewide minimum on top of the county's own process1415.
Who issues building permits in Howard County, and how do you reach them?
The Department of Inspections, Licenses & Permits (DILP) is at 3430 Courthouse Drive in Ellicott City, and its Permits Division can be reached at 410-313-2455; questions about an active project or code requirements go to DILP Inspections & Enforcement at 410-313-1823 instead4. Residential building permits are submitted electronically through the county's online portal, along with project-specific applications, checklists and fee schedules16. Inspections are required at each construction stage and depend on the type of work, covering everything from life-safety and mechanical/HVAC to plumbing, electrical and accessibility1718.
Does Howard County have zoning?
Yes, countywide. The Howard County Charter and Code empower the County Council to adopt maps dividing the county into zoning districts, and each district's regulations decide whether a given use is permitted, not permitted, or conditioned219. The Department of Planning and Zoning administers those districts and is the office to call about a specific parcel5. Columbia, Howard County's large unincorporated planned community, sits in the New Town (NT) Zoning District, where minimum lot size, setbacks, building height and lot coverage come from that development's own approved Comprehensive Sketch Plan criteria rather than one countywide number the way most of the rest of the county works20212223. A minimum dwelling-size requirement for the county overall is unconfirmed in the county's own published material; ask Planning and Zoning about the number for your specific district before you finalize plans5.
How do septic permits work in Howard County?
The Howard County Health Department has been designated the state's Approving Authority for onsite sewage disposal, meaning it, not a state office, reviews plans and inspects installations for compliance with state and local rules324. The county's fee schedule lists a new, upgrade or Bay Restoration Fund septic system permit at $496, an innovative or alternative system permit at $750, and commercial permits ranging from $496 up to 1,000 gallons per day to $925 over 5,000 gallons per day25. Statewide, a septic construction permit is valid for no more than two years, and no part of the system may be covered or used until the Approving Authority (here, the Health Department) inspects and approves it2627. Connecting to public water or sewer, once the main is built and in service, is voluntary unless the Health Department orders it, and the property owner must use a Howard County licensed On-Site Utility Contractor to make the connection28. A private well needs its own statewide construction permit, with a $160 Howard County Well Permit, Inspection, and Sampling fee729. Soil data explains why the Health Department's review matters here: only 9.9% of Howard County's soils rate free of severe limitations for a conventional septic drain field under USDA's soil survey, so budget for the county's site evaluation to likely require an engineered system30. Whether off-grid sanitation methods other than a permitted septic system, such as composting toilets, are allowed is unconfirmed in the county's published material; ask the Bureau of Environmental Health directly before relying on one6.
Can you live in an RV or tiny home on your land in Howard County?
Both questions are unconfirmed in Howard County's own published zoning and planning material, and the county's site does not state a specific rule allowing, limiting or prohibiting long-term RV occupancy, temporary camping, or tiny-home occupancy as a distinct housing type; ask the Department of Planning and Zoning directly before assuming either is allowed5. A related but different rule covers manufactured and modular homes: Maryland law bars a local government from prohibiting a new manufactured or modular home in any zone that allows single-family residential use, once the home is converted to real property with a permanent foundation and a recorded affidavit of affixation, though this does not require the county to allow a mobile home on wheels or a temporary foundation, and local building and zoning codes can still apply10. Maryland has also separately required local governments to adopt a law allowing accessory dwelling units on lots with a single-family detached home, which is a distinct question from occupying a tiny home as a property's only residence31.
Building a home in Howard County, Maryland: the steps, in order
- Confirm the zoning district for your parcel with the Department of Planning and Zoning, since Columbia's New Town District follows its own development-plan criteria instead of countywide numbers52.
- If you are dividing land rather than building on an existing lot, go through subdivision review; a residential or agricultural parcel split into four or fewer lots is a minor subdivision, and five or more lots makes it a major subdivision32.
- If your lot is not on public sewer, get septic plans reviewed and permitted by the Health Department's Bureau of Environmental Health before or alongside your building permit6325.
- If you need a private well, apply for the statewide well construction permit; Howard County's fee for the well permit, inspection and sampling is $160729.
- Submit your residential building permit application electronically through DILP's online portal416.
- Schedule the required construction-stage inspections with DILP as work proceeds417.
- If you are changing your driveway's footprint, get Howard County's free driveway permit before starting; ordinary repairs and maintenance do not need one, but a driveway onto a state highway needs a separate MDOT State Highway Administration permit instead1133.
- Get your final Use and Occupancy certificate from DILP before moving in1415.
What to check before you buy land in Howard County, Maryland
Confirm the zoning district with Planning and Zoning first, since a parcel inside Columbia's New Town District plays by different bulk rules than the rest of the county520. Budget for a real septic evaluation, not a simple drain field: just 9.9% of the county's soils rate free of severe limitations for a conventional system under USDA's survey30. If any part of the property falls in a FEMA-mapped 100-year floodplain, a local floodplain development permit is required for grading, filling, clearing, or building there, and construction in wetlands or waterways needs a separate state permit from Maryland's Department of the Environment3435. Severe drought affects the county in only about 1.3% of years, a comparatively low share36. The county sits about 16 miles from the nearest metro area, reflecting its position between Baltimore and Washington37. Typical property tax bills run around $6,814 a year at an effective rate near 1.2%; confirm the number for the specific parcel before you close3839. If you are eyeing the land for a short-term rental or want to know about agricultural exemptions from zoning or building rules, treat both as unconfirmed and call Planning and Zoning directly, since the county's published material does not state a general rule for either5.
Watch-outs
- Whether Howard County allows long-term RV occupancy, temporary camping, or a tiny home as a distinct housing type on private land is unconfirmed; ask the Department of Planning and Zoning directly rather than assuming5.
- If your parcel is in Columbia's New Town (NT) Zoning District, minimum lot size, setbacks, building height and lot coverage come from that development's own Comprehensive Sketch Plan, not a single countywide number20.
- Off-grid sanitation methods other than a permitted septic system are unconfirmed for Howard County; ask the Health Department's Bureau of Environmental Health before relying on one6.
Sources
- New Town Development Process (2026 county census)
- Zoning Regulations (2026 county census)
- Well & Septic Program (2026 county census)
- Howard County Department of Inspections, Licenses & Permits (DILP) (howardcountymd.gov)
- Howard County Department of Planning and Zoning (howardcountymd.gov)
- Howard County Health Department, Bureau of Environmental Health (howardcountymd.gov)
- Well Construction Permit Applications and Forms, quoted and re-checked
- Inspections, Licenses & Permits (2026 county census)
- Inspections, Licenses & Permits, quoted and re-checked
- Housing Expansion and Affordability Act (HB 538) Frequently Asked Questions, quoted and re-checked
- Driveway Permits, quoted and re-checked
- New Town Development Process, quoted and re-checked
- Maryland Code, Local Government Article, §§ 13-901 through 13-906 (Maryland statewide rule), quoted and re-checked
- Inspections & Enforcement Division, quoted and re-checked
- Maryland Public Safety Article § 12-505 (Maryland statewide rule), quoted and re-checked
- Permits, quoted and re-checked
- Inspections & Enforcement Division, quoted and re-checked
- Maryland Public Safety Article § 12-505 (Maryland statewide rule), quoted and re-checked
- Zoning Regulations, quoted and re-checked
- New Town Development Process, quoted and re-checked
- New Town Development Process, quoted and re-checked
- New Town Development Process, quoted and re-checked
- New Town Development Process, quoted and re-checked
- Well & Septic Program, quoted and re-checked
- Bureau of Environmental Health Fee Schedule, quoted and re-checked
- COMAR 26.04.02.03 On-Site Sewage Disposal Permits (Maryland statewide rule), quoted and re-checked
- COMAR 26.04.02.02 General Provisions (Maryland statewide rule), quoted and re-checked
- Utility Design Division, quoted and re-checked
- Well Construction Permit Applications and Forms (Maryland statewide rule), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Maryland Land Use Article §4-502 (Maryland statewide rule), quoted and re-checked
- Development Process and Procedures, quoted and re-checked
- Access Management/Permits - MDOT SHA (Maryland statewide rule), quoted and re-checked
- Floodplain Permitting in Maryland (Maryland statewide rule), quoted and re-checked
- Nontidal Wetland and Waterway Permits, Approvals and Certifications (Maryland statewide rule), quoted and re-checked
- Share of years in severe drought: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
Written September 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.