Mello-Roos (Community Facilities District) taxes: many newer San Diego County communities levy special taxes to fund infrastructure. They can add hundreds of dollars per month for decades — always get the exact figure, in writing, before you underwrite.
HOA dues in new communities can rise as the builder hands control to homeowners. Review the HOA budget and reserve study, not just the brochure number.
Builder incentives are negotiable, especially near phase closeouts — but bring your own representation. The onsite sales team works for the builder, not for you.
Get inspections anyway: new does not mean perfect. Phase inspections during construction catch what a final walkthrough will not.
Lot premiums and design-center upgrades add up fast. Price the home you will actually buy — not the model with everything in it.
If you are buying pre-completion, have an explicit plan for rate movement during the build, including what happens if your lock expires.