Cardiff by the Sea has its own elementary district, the Cardiff School District, not Encinitas Union. Cardiff School serves grades K to 2 and Ada Harris School serves grades 3 to 6. San Dieguito then assigns the Cardiff district area to Oak Crest Middle School and La Costa Canyon High School.
Which School District Serves Cardiff?
Cardiff is part of the city of Encinitas, but it has its own elementary district. The Cardiff School District runs two schools: Cardiff School for kindergarten through 2nd grade and Ada Harris School for grades 3 to 6. Assuming Encinitas Union for a Cardiff address is a common mistake.
The district lists Cardiff School at 1888 Montgomery Avenue and Ada Harris School at 1508 Windsor Road (Cardiff School District, retrieved October 29, 2026).
Encinitas Union describes its own area as the city of Encinitas and the Rancho La Costa area of south Carlsbad, and San Dieguito's policy names the Cardiff and Encinitas districts separately, which confirms they are different districts (EUSD and SDUHSD, retrieved October 29, 2026).
Where Do Cardiff Students Go After 6th Grade?
San Dieguito Union High School District's boundary policy assigns the Cardiff Elementary District to Oak Crest Middle School for grades 7 and 8, and includes the Cardiff district in the La Costa Canyon High School boundary. Two schools of choice, Canyon Crest Academy and San Dieguito Academy, take students by application.
Confirm the exact address with each district before you rely on it. Boundary policies can change through board action.
Cardiff School Path From the District Sources
Grades | School | Source |
|---|---|---|
K to 2 | Cardiff School, 1888 Montgomery Avenue | Cardiff School District |
3 to 6 | Ada Harris School, 1508 Windsor Road | Cardiff School District |
7 to 8 | Oak Crest Middle School | SDUHSD boundary policy |
9 to 12 | La Costa Canyon High School, or Canyon Crest Academy or San Dieguito Academy by application | SDUHSD boundary policy |
How Do Cardiff's Micro Areas Differ?
Cardiff is small, but its pockets feel different, from the walkable blocks near the beach to the hillside streets with views and the areas east of Interstate 5. The right pocket depends on whether you value walking to the coast, lot size, or quiet. We describe them from local experience, not a data set.
We think of Cardiff as an old legacy community. Many original style bungalows remain, alongside new modern luxury homes built on legacy lots.
The tradeoff we talk through with buyers is a smaller home in a great location and neighborhood versus a much larger home with somewhat less lot.
Cardiff Buyer Checklist
- Confirm the address with the Cardiff School District office.
- Confirm middle and high school assignment with SDUHSD.
- Read the Natural Hazard Disclosure for flood and fire zones.
- Check the tax bill for school district Mello-Roos lines.
- If you plan to remodel, ask the city about coastal permit requirements.
- Walk the block at different times of day.
What Else Should Cardiff Buyers Check?
Check the same items you would anywhere on the coast: flood and fire zone disclosures, coastal permit history if you plan to remodel, and whether the parcel pays any school district Mello-Roos. The tax bill and the Natural Hazard Disclosure settle most of these quickly, so request both early in escrow.
The city's Cardiff-by-the-Sea Specific Plan covers about 17.09 acres, and San Elijo Lagoon on Cardiff's edge is a county park and state ecological reserve (relayed, City of Encinitas). Ask the city whether a parcel falls inside the Specific Plan before planning changes.
The County Auditor's FY 2026-2027 list includes several San Dieguito Union High School District Community Facilities Districts. Whether a Cardiff parcel pays one shows on its tax bill (County of San Diego Auditor and Controller, retrieved October 29, 2026).
Frequently Asked Questions
Here are direct answers to the questions buyers ask us most about this topic. Each answer is based on the sources listed below, retrieved October 29, 2026. Where a detail depends on your situation, the answer says so, and we are glad to walk through yours in a short conversation.
Is Cardiff in Encinitas Union School District?
No. Cardiff by the Sea has its own elementary district, the Cardiff School District. Cardiff School serves grades K to 2 and Ada Harris School serves grades 3 to 6. Confirm the specific address with the district.
What middle school do Cardiff students attend?
San Dieguito Union High School District's boundary policy assigns the Cardiff Elementary District to Oak Crest Middle School for grades 7 and 8. Confirm the address with the district before relying on it.
What high school serves Cardiff?
San Dieguito's policy includes the Cardiff school district area in the La Costa Canyon High School boundary. Canyon Crest Academy and San Dieguito Academy are schools of choice that take district students through an application process.
How many schools are in the Cardiff School District?
Two. Cardiff School at 1888 Montgomery Avenue serves grades K to 2, and Ada Harris School at 1508 Windsor Road serves grades 3 to 6, according to the district.
Do Cardiff homes pay Mello-Roos?
Some parcels may. The County Auditor lists several active San Dieguito Union High School District Community Facilities Districts. Whether a specific Cardiff home pays one appears on its property tax bill, which you should review in escrow.
Sources
- Cardiff School District, cardiffschools.com (Cardiff School grades K-2, Ada Harris School grades 3-6), retrieved October 29, 2026
- San Dieguito Union High School District, "Boundaries Map" attendance boundary policy, sduhsd.net/Our-District/About-Us-History/Boundaries-Map-/, retrieved October 29, 2026
- Encinitas Union School District, "Our District," eusd.net/our-district, retrieved October 29, 2026
- County of San Diego Auditor and Controller, Active Mello-Roos Districts (CFD) list, FY 2026-2027, sandiegocounty.gov/content/dam/sdc/auditor/pdf/cfd.pdf, retrieved October 29, 2026
- City of Encinitas, Cardiff-by-the-Sea Specific Plan page, encinitasca.gov (relayed from Marketing Director browser check, October 29, 2026; page returned 403 to our fetch)