Zoning Regulations in Pasadena

There are some special rules for ADU construction in Pasadena that we should know. Different rules apply in different areas of the city. ADUs are allowed in residential areas, but certain conditions have to be met. ADUs are not allowed in commercial and industrial areas. It is very important to follow the zoning rules.

Zoning Regulations

ADU Size Limitations

The size of the ADU depends on the size of your main house and the area of the plot. Small ADUs can be built on small plots. Large ADUs are allowed on large plots. We have to keep in mind that the size of the ADU is according to the rules. Non-compliance with the rules can lead to fines.

Plot size and permissible area

Plot Size  Single-family (maximum area) Duplex and multi-family (maximum area)
6,500 1,400 sqft 900 sqft
8,000 1,700 sqft 1,100 sqft
12,000 2,000 sqft 1,400 sqft
16,000 2,600 sqft 1,800 sqft
22,000 3,200 sqft 2,200 sqft

ADU Height Limitations

Special rules apply in Pasadena for the height of the ADU. The maximum height of a single-storey ADU can be up to fifteen feet. For a two-story ADU we get permission up to twenty-five feet in height. The height is determined by taking into account the height of the main building and the surrounding houses.

Building coverage

There   is a limit to how much space the ADU can occupy on the ground. The main house and the ADU together cannot occupy more than fifty percent of the area of the plot. It is important to have an open space so that the movement of air and light is maintained. It is also necessary to leave enough space for greenery.

Location

The status of the ADU should be carefully selected which conforms to the rules. ADUs can be built behind or next to the main building. Cannot make ADU on the front. Select the location keeping in mind the privacy of the neighbors.

Single-Family Homes:

  • Detached ADUs: Separate ADUs should be at least ten feet away from the main house. This distance is necessary for privacy and security.
  • Attached ADUs: Connected ADUs should be integrated with the main house. It is necessary to have separate entrances.

Duplexes and Multi-family:

  • General Requirements: Additional parking will have to be arranged for ADU in duplexes. Adherence to all safety standards is essential.
  • Zoning Specifics: Special zoning regulations apply for ADUs in multi-family buildings. It is mandatory to follow them.

Exterior details

The exterior design of the ADU should match the main house which is beautiful in appearance. Carefully choose colors and materials that look attractive. The roof design should resemble the main building. Locate windows and doors in such a way that the light and air are good.

Parking

Additional parking may have to be arranged for ADU which is as per rules. The provision of parking of a car is mandatory unless exempted. Access to the parking lot should be easy. ADUs near public transport may get discounts in parking.

Setbacks and Buffer Zones

Setback rules are related to leaving empty space around the ADU. A setback of twenty feet is a must at the front. A setback of five feet will have to be placed at the back and side. This empty space helps in an emergency.

Minimum Lot Area (RF Zone)

There is a rule of minimum plot area for building ADUs in the RF zone. ADUs are not allowed on small plots. The size of the plot should be at least four thousand square feet. There is more flexibility in building ADUs on larger plots.

Minimum plot area according to residential area

zone Minimum plot area
R-22 5,500 sqft
R-12 8,000 sqft
R-8 11,000 sqft
R-6 16,000 sqft
R-3 22,000 sqft

Connection For Utilities

It is very important for ADUs to have proper utility connections that are secure and reliable. The connection of electricity, water and sewer line should be separate from the main house. Meters will have to be arranged separately. The gas line connection must be in accordance with safety standards.

For utility connections, the services of a qualified contractor who is experienced should be taken. All connections must be installed as per municipal rules. There should be regular checks and maintenance. Shut-off valves should be easily accessible for emergencies.

Fire Safety

It is important to follow stringent rules for fire safety that save lives. Smoke detectors and carbon monoxide alarms will have to be mandatorily installed. There should be a provision for emergency exit. The need for a fire sprinkler system depends on the size of the building.

Room Specifications

Room Specifications

  • Sleeping Areas: The minimum size of the bedroom should be seven feet by ten feet. It is mandatory to have a window that helps with emergency evacuation. Electrical switches and plug points should be in convenient locations.
  • Kitchen: The kitchen should have adequate ventilation and lighting. The minimum area of the countertop should be twenty square feet. Keep proper distance between the sink and stove.
  • Bathroom:  The bathroom should have a mandatory arrangement of toilet, washbasin and shower. It is important to install an exhaust fan. The floor should be of non-slippery material.
  • Storage Spaces: At least fifty square feet of space is required for storage. Shelves and shelves should be at a convenient height. The luggage space should be organized.

Short-term Rentals and Home Occupations Regulations

Short-term renting requires special permission as per rules. To run a business from home, a separate license has to be taken. Rules governing noise and traffic apply. It is necessary to immediately pay attention to the complaints of neighbors.

Building Codes

It is mandatory to follow all the rules of the Building Construction Code which ensure safety. Selection of construction materials and techniques has to be done according to the standards.  It is necessary to get the inspection done from time to time. Strict action can be taken for violating the rules.

ADU Permit Pasadena Guidelines

Keep all the necessary documents ready to obtain a permit that will simplify the process. Plans and maps should be clear and detailed. Ensure compliance with all standards at the time of inspection. Keep in mind the time limit.

Cost of Permit

Permit Type cost
Building Permits ₹2,500 – ₹5,500
Electrical Permit ₹300 – ₹600
Plumbing Permit ₹250 – ₹450
Mechanical Permit ₹200 – ₹400
Demolition Permit ₹150 – ₹250
Landscaping Permit ₹100 – ₹150

Property Requirements

Meeting the property requirements is the first step of ADU construction. The size of the plot should be as per the rules. The slope of the ground should not exceed fifteen percent. It is necessary to get the soil tested so that the foundation can be strengthened.

Parking

Parking arrangements will have to be made according to the rules which are convenient. Parking of a vehicle is mandatory unless special discounts are obtained. Access to the parking lot should be easy. ADUs near public transport get discounts in parking.

Front setbacks

Enough space has to be left in front which conforms to the rules. A distance of twenty feet from the main road is mandatory. Landscaping can be done for beauty and safety. Trees and plants can be planted in the setback.

Side and rear setbacks

A setback of five feet on the sides and back is a must. This place comes in handy in case of emergency. The privacy of neighbors should be respected. Useful plants can be planted in the setback area.

Open space and rear yards

Having open spaces is essential for a healthy life that creates a ventilated environment. Keep at least three hundred square feet of space open in the backyard. There should be space for children to play. Try to maintain greenery.

Properties That Qualify

The property must meet certain criteria to build an ADU in Pasadena. ADUs are allowed in both single family housing and duplexes. The size of the plot should exceed the minimum requirement. It is necessary to have direct access to the road.

Second paragraph: There should not be any illegal construction already on the property that follows the rules. There should be no outstanding taxes or penalties. The building meets safety standards. Parking and utility connections should be possible.

Development Standards

Single-family

  • Attached: The connected ADU should look integrated with the main house that looks beautiful. The entrance door should be different but the design should be similar. The interior structure can be attached to the main house. Privacy should be taken care of.
  • Detached: The separate ADU should be at least ten feet away from the main house. Arrange independent utility connections. The exterior appearance should match the main house. There should be separate parking arrangements.

Duplex properties

  • Attached: Special rules apply for attached ADUs in duplexes. Each unit should have a separate entrance. Utility connections should be separate for each unit. Adherence to standards of privacy and security is essential.
  • Detached: The land of the duplex should be large enough for separate ADUs. Maintain proper distance from both existing units. Additional parking arrangements will have to be made. All facilities should be freely available.

Multifamily properties

  • Attached:  Special permits are required for connected ADUs in multi-family buildings. The amenities of existing residents should not be affected. Additional fire safety measures will have to be taken. The use of common areas should be controlled.
  • Detached: The multi-family property should have enough open space for separate ADU. Proper parking arrangements are mandatory. Noise control measures have to be taken. Consent of all residents is required.

Junior ADUs (JADUs)

Junior ADU is built inside the main house which is smaller than 500 square feet. The kitchen can be used for shared use. It is necessary to have separate entrances. The bathroom can be private or shared.

Property Designations

Property Designations

  • Flood Zones: Special care has to be taken to build ADUs in the flood zone. The height of the foundation should be above the flood level. Make proper drainage arrangements. Insurance coverage is mandatory.
  • Geohazard Zones: Special construction techniques have to be used in earthquake prone areas. Get the soil thoroughly tested. ADUs are not allowed in landslide prone areas. Be sure to seek expert advice.
  • Historic Designation: Special permission is required to build ADUs in buildings of historical importance. It is necessary to maintain the original architecture. The design of the new construction should match the old architecture. The concurrence of the Heritage Conservation Committee is necessary.
  • Easements: ADUs cannot be formed in areas reserved for public use. The utility element must be left blank. Do not affect the neighbor’s facilities. Scrutiny of legal documents is necessary.

Pre-Approved Pasadena ADUs

There are some ADU designs already approved in Pasadena that simplify the process. All the necessary standards have been adhered to in these designs. The cost and time of construction is reduced. Permits are easy to obtain.

There are various sizes and styles available in pre-approved designs that offer options. Small changes can be made to these designs as needed. Energy efficiency standards are already included. Quality and safety are ensured.

Start Your ADU Project Today!

At ADU Builders CA we are committed to making your ADU construction a success. Our expert team will guide you every step of the way. Contact us today for a free consultation. We will get our full support in making the ADU of your dreams.

FAQs

You need site plans, floor plans, structural designs, and energy compliance documents.

 

The process typically takes 2-3 months, depending on project complexity.

Some cities offer pre-approved designs; check with the Pasadena Planning Department.

A soil report may be necessary, especially for hillside properties.

Impact fees may apply for ADUs larger than 750 sq. ft.

Yes, with proper planning, construction can minimize disruptions.

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