How Do I Stop My Neighbor From Building a Second Story Addition?

Local ordinances and permitting requirements may give you grounds on which to block a neighbor's new construction.


I live in a neighborhood of mostly single-level homes. My neighbor wants to add a second story to her house. I am concerned that this addition will change the character of my neighborhood and that the new second story will shade my backyard. The shade may kill my garden and lawn. How do I stop my neighbor from building a second story addition?


Since this type of development can proceed quickly, your best bet is to promptly determine the status of any development application, including applications for building and land use permits, filed by your neighbor. To determine whether applications have been filed, and if so, the status of those applications, contact both your local planning department and building department.

When you do, have your neighbor’s address available, since the application may not be under her name.

It is possible that your neighbor will need to obtain both a land use permit and a building permit. Land use permits are often required when owners seek to change the use of their land (for example, from single-family residential to multifamily), or construct a new commercial or multifamily project on their property. You can typically determine whether a land use permit is necessary by reviewing the local zoning ordinance. If the ordinance is unclear, you can seek clarification from the local planning department or a land use attorney.

Regardless of whether a land use permit is required or not, your neighbor will certainly need to obtain a building permit. Building permits are required to ensure public health, safety, and general welfare. A landowner must ordinarily obtain a building permit in order to construct, enlarge, convert, add onto, or demolish a structure. And the owner must obtain the permit before, not after, beginning construction.

As part of the building permit application process, city or county staff will review the application by for compliance with not only the building code, but also the zoning ordinance (sometimes called a “development code”). Others who might review the application include the road master, fire marshal, local law enforcement agency, and the city or county engineer.

If the planned addition is prohibited by the building code or zoning ordinance (or any other code or ordinance), the permit may be denied. In some situations, the applicant may be able to apply for a “variance,” which allows the development to proceed despite some inconsistencies with a code or ordinance.

Whether a proposed second story addition is in compliance with all codes and ordinances will require a detailed review of both the proposed addition and applicable codes and ordinances. Some common issues, though, that a person adding on to a house may encounter include:

  • Height restrictions. Many residential zones have height restrictions that limit the height of a new building to between 28 and 35 feet. These restrictions exist primarily for fire and building safety. However, height restrictions are also provided for aesthetic reasons, like preserving mountain or ocean views. If your neighbor’s proposed second story addition will violate the applicable height restriction, you should alert the building department. Your neighbor may be able to redesign the addition to comply, but by making sure the height restriction is enforced, you at least can minimize the impact the second story will have on your property.
  • Solar access. Solar access or solar setbacks are intended to make sure existing development continues to receive sunlight without obstruction from new buildings and additions. If it exists, a solar access provision will normally be found in your local zoning ordinance and state something like:

“The purpose of this solar access provision is to provide as much solar access as feasible during the winter solar heating hours to existing or potential buildings by requiring all new structures to be constructed as far south on their lots as is necessary and feasible.”

If your local zoning ordinance includes such a provision, make sure the proposed second story addition complies with the stated rule. Typically, there are exceptions written into solar access provisions to allow development in cases where strict compliance with the provision would make development impractical. So again, this provision may not stop development of the second story, but by making sure the solar access provision is enforced to the extent possible, you can minimize the impact of the addition.

  • Setbacks. A “setback” requires that a building be a certain distance from a property line. In residential zones, there may be a front yard setback (such as 20 feet), side yard setback (perhaps five feet), and backyard setback (such as 15 feet). If a second story addition does not change the building’s footprint, the setback codes are not likely to be an issue for your neighbor. However, if the addition will require enlarging the house’s footprint, you will want to confirm that the addition complies with applicable setbacks.
  • Lot coverage. In many single family residential zones, lot coverage requirements minimize the amount of space the house can cover on a lot. For example, on lots that are greater than 5,000 square feet, a local jurisdiction may allow the house to cover 35% of the lot. Similar to the setbacks, if the second story addition will enlarge the house footprint, you should confirm that it does not violate the applicable lot coverage requirement. If it does, your neighbor may have to redesign the addition.
  • Historic districts. If you live in an older neighborhood, you and your neighbor may be located in a historic district. If so, your neighbor will have an additional set of standards she must comply with when remodeling or adding on to her property. In short, any addition must be consistent with the historic character of the existing building and neighborhood. This can add significant expense and complexity to any building project. If you are in a historic district, and your neighbor’s second story addition is not consistent with development in the neighborhood, you may be in a good position to argue that the addition should be denied.

In addition to building code and zoning ordinance provisions that may provide arguments for why your neighbor’s second story addition should not be approved, you may also want to look into whether any private agreements limit development. For example, is your property located in a subdivision with Covenants, Conditions, and Restrictions (“CC&Rs”) that prohibit second stories? Be sure to review any CC&Rs that apply in your neighborhood.

In addition to CC&Rs, other private agreements may limit development on your neighbor’s property. For example, a previous owner of your house may have, after agreement with the owner of your neighbor’s property, created and recorded an easement that protects your right to sunlight or a view, by limiting development on your neighbor’s property. If you are unaware of any such agreement, you may need to go down to the County Clerk or County Recorder to search the public records. A title company or real estate attorney can help you with this type of search.

A real estate or land use attorney should be able to help you work through the possible arguments you may have and help you properly challenge your neighbor’s second story addition. You should move promptly to protect your rights. Missing a deadline may bar you from being able to challenge the addition, even if the addition will violate the law.

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