Homeowner

Del Mar Zoning Rules Homeowners Should Know: STR Caps, Home Businesses & ADUs

By Hedda ParashosOctober 21, 2026

Del Mar enforces some of the tightest zoning rules in San Diego County. Before you buy, renovate, or plan a rental strategy there, here is what the city actually allows — and what it does not.

Del Mar zoning rules are stricter than most San Diego coastal cities, and they catch buyers off guard more often than you would expect. If you are purchasing in Del Mar with plans to rent short-term, run a home business, or add a backyard structure, the city has specific rules that will shape what you can do from day one.

The Short-Term Rental Cap Is a Hard Stop

Del Mar caps short-term rentals at 129 permits citywide. As of now, 150 registered STRs already exceed that cap, so new permits are on hold. If you buy a Del Mar home expecting to list it on Airbnb or Vrbo, you cannot get a permit today. You can join a waitlist, but there is no timeline on when that list will move.

When permits do open, the rules are specific. The rental must be your primary residence, and guests must stay a minimum of three nights. This is a meaningful constraint for anyone modeling investment returns on a short-term rental strategy. Find out what your home is worth →

The City of Del Mar publishes current permit status and STR ordinance details on its official website if you want to track any changes.

Del Mar Zoning Rules for Home Businesses and Sheds

Del Mar does allow home-based businesses in residential zones, but the restrictions are tight. The business must run entirely inside the house, operated only by a resident family member. No employees may work on site, no signs or displays are permitted, no customer traffic, no deliveries, and no stock stored on the property. If your business model depends on any of those things, Del Mar's rules will not accommodate it.

Accessory structures like sheds follow different setback rules depending on your zone. In R1-10, R1-14, and R1-40 zones, a shed must meet the full zone setbacks: 20 feet front, 25 feet rear, and 7.5 feet interior side. In other residential zones, a one-story accessory building up to 500 square feet can be placed without rear setbacks, and without side setbacks if it sits in the rear 30 percent of the lot. Knowing your specific zone before you build anything saves you from a costly permit rejection.

What This Means For You

• If you are buying Del Mar as an investment rental, the STR permit freeze is a deal-defining factor. Model your returns using long-term rental income only, unless you already hold a permit.

• Home businesses that involve any outside activity, client visits, or deliveries are not permitted in residential zones. Remote, solo, interior-only work is the only setup Del Mar allows.

• Accessory structure placement depends on your specific residential zone designation. Pull your zone classification before drawing any plans.

• Del Mar's rules change. Buyers who close today should bookmark the city's ordinance page and revisit it annually, especially on STR policy. Find out what your home is worth →

Del Mar is one of the most desirable coastal cities in San Diego County, and its zoning code reflects a deliberate effort to preserve residential character. That is useful to understand whether you are buying, selling, or already living there. If you are still building your search and want to compare Del Mar's environment with other coastal options like La Jolla, the differences in what each city permits are worth mapping out before you commit. Tell us your budget, timeline, and priorities, and we will help you build a La Jolla neighborhood shortlist.

Frequently Asked Questions

Can I get a short-term rental permit in Del Mar right now?

No. Del Mar caps STR permits at 129 citywide, and current registrations already exceed that number. New applicants can only join a waitlist, with no guaranteed timeline for availability.

What are the Del Mar zoning rules for accessory structures like sheds?

Setbacks depend on your residential zone. In R1-10, R1-14, and R1-40 zones, full setbacks apply: 20 feet front, 25 feet rear, 7.5 feet interior side. In other residential zones, a one-story structure up to 500 square feet may qualify for reduced rear and side setbacks if placed in the rear 30 percent of the lot.

Does Del Mar allow home-based businesses in residential areas?

Yes, with strict limits. The business must operate entirely inside the home, run by a resident family member only, with no employees, no customer visits, no signage, no deliveries, and no on-site stock. Any business that requires outside activity or client traffic does not qualify under Del Mar's home occupation rules.

Source: townpermitguide.com