Part 2: What Do RS-1-13 and RM-1-1 Mean?

If you found your property on the zoning map, you probably noticed one of two designations:

🟨 RS-1-13

🟫 RM-1-1

But what do those letters and numbers actually mean?

The short answer is...

They are base zoning districts established by the City of San Diego.  Residential Base Zones

Every property within the city has a zoning designation that establishes the baseline rules for how land may be used and developed.

RS-1-13

RS stands for Residential Single Unit.

The purpose of the RS zone is to provide neighborhoods primarily intended for detached single-family homes.

These neighborhoods generally have lower residential density and development standards intended to preserve their residential character.

RM-1-1

RM stands for Residential Multiple Unit.

The RM zone was created to accommodate a broader range of residential development and generally allows higher residential density than the RS zone.

Although every RM property within San Diego Rancho La Cresta is currently developed with detached single-family homes, the underlying zoning classification is different.

Why Is This Important?

Here's an interesting example.

Imagine two homeowners with nearly identical homes.

They may have:

• The same builder.

• The same floor plan.

• The same HOA.

• The same CC&Rs.

Yet they may have different underlying zoning.

That's because zoning follows the City's zoning map—not the model homes built by the developer.

For most homeowners, this difference has little impact on day-to-day life.

However, when someone considers expanding a home, building an ADU, or making other significant improvements, the property's zoning becomes one of several important factors that determine what may be permitted.

Zoning Is Only One Piece of the Puzzle

Understanding your property's zoning is important, but it is only one part of the picture.

Homeowners are also subject to:

• California housing laws

• City development regulations

• HOA CC&Rs

• Architectural Review standards

Each of these serves a different purpose.

California law establishes statewide requirements.

The City establishes zoning and development regulations.

Our HOA helps preserve the architectural character and appearance of the neighborhood by applying its governing documents consistently throughout the community.

Together, these layers create the framework that governs residential development within San Diego Rancho La Cresta.

Looking Ahead

Over the past decade, California has enacted numerous housing laws that have changed residential development throughout the state.

Some of these laws apply differently depending on a property's zoning.

Others apply broadly across nearly all residential neighborhoods.

In Part 3, we'll begin exploring how these state housing laws interact with City zoning and our HOA governing documents—and what they may mean for homeowners in San Diego Rancho La Cresta. As long as you continue living in your home without making significant changes, you may never think about your property's zoning designation. However, if you decide to add onto your home, build an Accessory Dwelling Unit (ADU), or make other substantial improvements, your property's zoning becomes one of several important factors that determine what may be allowed.

Why Our HOA Matters

One of the strengths of living in a planned community is that our HOA provides a consistent architectural vision for the neighborhood.

While zoning establishes the City's land-use regulations, our CC&Rs and Architectural Review process help preserve the appearance and character that attracted many of us to this community in the first place.

Even though two homes may have different underlying zoning, homeowners generally expect the neighborhood to maintain a consistent look and feel. That's one of the important purposes of an HOA—to apply architectural standards fairly and consistently throughout the community while complying with applicable law.

One of the HOA's most important responsibilities is to apply its governing documents consistently and fairly. Consistent architectural review helps ensure that homeowners are treated consistently while preserving the character of the community.