City facts, housing, address checks, school districts and local rules, each with its source.
San Marcos is an incorporated city in North County, about 40 miles north of downtown San Diego, with 94,833 residents at the 2020 Census. Homes range from single-family subdivisions to townhomes, condos, apartments and mobile home parks. Before you make an offer, check the exact address for HOA documents and Mello-Roos, fire and flood zones, the airport influence area and assigned schools. The City says short-term rentals are not permitted in residential zones, and it runs a Permit-Ready ADU program.
General information only, not legal advice. See the note near the end of this page.
Want a San Marcos real estate agent to look at a specific home with you? Karina Somenzari, REALTOR®, works with buyers and sellers in San Marcos and across San Diego County's cities and communities, in English or Portuguese; contracts and escrow documents are in English.
| Topic | What the official record shows |
|---|---|
| City status | Incorporated January 28, 1963. It is one of San Diego County's 18 incorporated cities. City Hall is at 1 Civic Center Drive, San Marcos, CA 92069, and the City Council has four districts, each with a council member, plus a mayor. |
| Location | In the central part of North County, about 40 miles north of downtown San Diego, by the City's description. Vista and Carlsbad border it on the west, Escondido on the east, and County land lies to the north and south. There are no airports inside city limits. |
| Land area | 24.57 square miles of land (Census Bureau, 2025 Gazetteer). |
| Population | 94,833 at the 2020 Census. |
| ZIP codes | 92069 and 92078 appear on official City addresses. Confirm the city for any home near the edge. |
| Colleges | Palomar College and California State University San Marcos are in the city. |
The City's General Plan background report describes San Marcos as primarily residential. Its land use categories range from single-family homes in subdivisions to duplexes, townhomes, condominiums and apartments, and mobile home parks are allowed in some categories. The report also says the city has a large number of specific plan areas (more than 80). Named plans include San Elijo Hills, Santa Fe Hills (Paloma) and the San Marcos Creek Specific Plan.
The City says 18 mobile home parks operate in San Marcos. It has a rent review ordinance for them. Under the City's page, the review process starts only if a petition is submitted by 51 percent of affected residents.
If you're buying a resale home in a homeowners association (HOA), California Civil Code 4525 lists what the owner must give you before closing, including the governing documents, the latest budget report, current assessments and fees, and any unpaid assessments or fines. No HOA count is published, so ask about each address and read the documents before your contingencies end.
A Community Facilities District (CFD), often called Mello-Roos, charges owners inside it a special tax each year, often to repay bonds or pay for services. The City publishes a CFD page. Its list includes CFD 88-1 (Paloma/Santa Fe Hills), CFD 98-02 (Lighting and Landscaping), CFD 99-01 (San Elijo Hills) and CFD 2002-01 (University Commons), as well as districts for police and fire. The County Auditor's FY 2025-2026 list also shows several San Marcos districts. San Marcos Unified School District levies school CFDs and posts CFD disclosure documents.
Whether a home pays a special tax depends on its parcel. Check the current tax bill through the San Diego County Treasurer-Tax Collector and the seller's disclosures.
CAL FIRE's 2025 map for San Marcos's local responsibility area puts roughly half of the city's land in the Very High Fire Hazard Severity Zone, with smaller areas in High and Moderate. Use CAL FIRE's viewer to see where one address falls. The seller's Natural Hazard Disclosure report states whether a home sits in a mapped fire zone. For homes in High and Very High zones, state law has also required documentation on defensible space since July 1, 2021 (Civil Code 1102.19).
Some parts of the city, mainly along San Marcos Creek and its tributaries, are mapped in FEMA flood zones. Look up the address at the FEMA Flood Map Service Center. A home inside a FEMA Special Flood Hazard Area needs flood insurance if the mortgage comes from a federally regulated, supervised or insured lender.
McClellan-Palomar Airport is in Carlsbad, about 2.5 miles west of San Marcos. The General Plan background report says most of the planning area lies in the airport's influence area, where limits on building heights are the main land use restriction. A Notice of Airport in Vicinity may apply to a resale. Check the address on the Airport Authority's ALUCP mapping tool.
The County's coastal zone map shows no coastal zone land inside San Marcos city limits. Confirm any address on the Coastal Commission map.
Karina's free property report can pre-check fire, flood and fault zones for an address.
San Marcos Unified School District serves nearly all of the city. A few edges of the city fall in other school districts, and district lines don't follow city limits, so the exact address decides.
| District | Address lookup |
|---|---|
| San Marcos Unified School District | MySchool Locator (enter a street address) |
If the locator doesn't return a San Marcos Unified school, the address may be in another district. Ask that district for its own boundary lookup. Only the district can confirm an attendance boundary. This page doesn't rate or rank schools.
The City runs a Permit-Ready ADU program with pre-approved, detached one-story plans. The City says it is meant to save time and money by avoiding initial design and review costs. The plans can't be altered; a customized ADU needs a standard ADU building permit. The City says it will approve or deny an application within 30 days of receiving a complete one. State law (Civil Code 4751) voids HOA rules that effectively prohibit or unreasonably restrict ADUs on single-family lots. This page doesn't cover size limits, fees or parking, so ask the City's Planning and Building divisions before you plan one.
The City's Transient Occupancy Tax page says short-term rentals are not permitted in residential zones. The San Marcos TOT rate is 10%, and the tax is required when a property is used for short-term lodging. The City also says a bed and breakfast may apply for a Conditional Use Permit in certain zones. Confirm with the Planning Division before you buy for short-term rental use.
The City's housing pages list state housing-production laws and a mobile home rent review ordinance. Those pages don't mention a local rent cap or just-cause rule for apartments, and this page doesn't review the municipal code. California's statewide tenant rules apply, so ask the City or a real estate attorney about a specific rental.
Regional access is by State Route 78, an east-west highway that links Interstate 5 with Interstate 15. NCTD's SPRINTER hybrid rail line also runs through the city. It spans 22 miles, connects Oceanside, Vista, San Marcos and Escondido, and has 15 stations along the Highway 78 corridor. Palomar College is a SPRINTER stop in San Marcos, and BREEZE buses serve the San Marcos Civic Center and Cal State San Marcos. In Oceanside, the SPRINTER connects to the COASTER. See NCTD for current schedules.
The City says it has 44 parks on over 300 acres, two pools, three recreation centers and a 72-mile trail network for hiking, biking, running and equestrian use. Its nickname is "San Parkos." Named City facilities include Bradley Park and the 3.4-acre Bradley Bike Park, Buelow Park, Civic Center Park, and Cerro de las Posas Park and Pool, which has a 25-yard heated recreational pool. Jack's Pond Nature Center is at 986 La Moree Road. The City also posts an interactive trail map on its hikes and ranger program page.
If you own in San Marcos, several of the checks above are part of your disclosure package: the Natural Hazard Disclosure report, any airport notice, HOA documents, any Mello-Roos notice and, in High and Very High fire zones, the defensible-space documentation. They go along with the other forms California requires, starting with the Transfer Disclosure Statement, so this isn't a complete list. See selling a house in San Diego for the disclosure list, costs and timing, or request a free home value estimate.
Karina Somenzari, REALTOR®, is a real estate agent licensed in California (DRE# 02248263) with eXp Realty of California, Inc. She represents buyers and sellers in San Marcos and across San Diego County. You can work with her in English or Portuguese; contracts and escrow documents are in English.
To start, tell her about your plans, call 619-369-4598 or, if you're selling, ask what your San Marcos home is worth. If you'd rather talk in Portuguese, read about working with a Portuguese-speaking real estate agent.
San Marcos is its own city in northern San Diego County, separate from the City of San Diego. It incorporated on January 28, 1963, and it is one of the county's 18 incorporated cities. The City describes itself as in the central part of North County, about 40 miles north of downtown San Diego. Vista and Carlsbad border it on the west and Escondido on the east, and County land lies to the north and south.
San Marcos Unified School District serves nearly all of the city. A few edges of the city fall in other districts, so the address decides. Enter the street address in the district's MySchool Locator, then confirm the assignment with the district before you rely on it. This page doesn't rate or rank schools.
Yes. The NCTD SPRINTER hybrid rail line runs 22 miles through Oceanside, Vista, San Marcos and Escondido, with 15 stations along the Highway 78 corridor. Palomar College is a SPRINTER stop in San Marcos, and BREEZE buses connect to the San Marcos Civic Center and Cal State San Marcos. The SPRINTER connects to the COASTER in Oceanside. Check NCTD for current schedules.
Many addresses do. The City lists Community Facilities Districts, including CFD 88-1 (Paloma/Santa Fe Hills), CFD 99-01 (San Elijo Hills) and CFD 2002-01 (University Commons), and San Marcos Unified School District levies school CFDs of its own. Whether a home pays a special tax depends on its parcel. Check the property tax bill and the seller's Mello-Roos disclosure notice.
The City's Transient Occupancy Tax page states that short-term rentals are not permitted in residential zones. The San Marcos transient occupancy tax rate is 10%. Confirm with the City's Planning Division before you buy a home you plan to use for short-term rental.
Use CAL FIRE's fire hazard severity zone viewer, the FEMA Flood Map Service Center and the Airport Authority's ALUCP mapping tool for McClellan-Palomar Airport. For one specific home, the seller's Natural Hazard Disclosure report names the zones. Karina's free property report can pre-check fire, flood and fault zones for an address before you make an offer.
Karina offers a free, no-pressure conversation in English or Portuguese, whether you're buying or selling in San Marcos (contracts and escrow documents are in English). Bring an address, and she'll go over these checks with you.