Chapter 18.83
Off-Street Parking and Loading Regulations

18.83.090 Design standards: General parking facilities

18.83.100 Design standards: Landscaping in Parking Facilities and Required Landscaped Areas

18.83.010 Specific purposes

18.83.015 Definitions

18.83.020 Applicability of regulations

18.83.030 Parking assessment districts and areas

18.83.040 Basic regulations

18.83.050 Schedule of off-street parking, loading and bicycle facility requirements

18.83.060 Design standards: Purpose

18.83.070 Design standards: Accessible parking

18.83.080 Design standards: Bicycle parking facilities

18.83.110 Design standards: Other

18.83.120 Adjustments to requirements by the director of planning and community environment

18.83.130 Adjustments to requirements in Parking Assessment Areas by the zoning administrator

18.83.090 Design standards: General parking facilities.
    1. Requirements for dimensions of parking facilities at, above, and below grade are contained in this section and in Figures 3-5 and Tables 3-10 of subsection (m).
    2. Stalls and aisles must be designed such that columns, walls, or other obstructions do not interfere with normal vehicle parking maneuvers. All required stall and aisle widths must be designed to be clear of such obstructions.
    3. The required stall widths shown in Tables 3-5b of subsection (m) shall be increased by 0.15 meter (0.5 foot) for any stall located immediately adjacent to a wall, whether on one or both sides.
    4. Dead end aisles shall be avoided to the greatest extent feasible.
    5. Except for at-grade parking facilities serving a maximum of two dwelling units, all parking facilities shall be set back a sufficient distance from the street so that vehicles need not back out into or over a public street (not including an alley) or sidewalk.
    6. Each standard off-street parking stall, except for compact or uni-class parking stalls, shall consist of a rectangular area not less than 2.6 meters (8.5 feet) wide by 5.5 meters (18 feet) long.
    7. As an alternate to the provision of standard and compact parking stalls specified in Tables 3, 4a, and 4b of subsection (m), uni-class parking stalls may be installed as specified in Tables 5a and 5b of subsection (m) for all uses requiring five or more parking stalls. Standard and compact parking stalls shall not be used on a site where uni-class parking stalls are used.
    8. Dimensions of standard, compact, and uni-class stalls for parallel parking shall be as follows. The minimum dimensions of such a stall located adjacent to a wall shall be 3.0 meters (10 feet) wide and 6.1 meters (20 feet) long. The minimum dimensions of such a stall located adjacent to a curb with a minimum 2-foot clearance to a wall shall be 2.4 meters (8 feet) wide and 6.1 meter (20 feet) long. These required stall widths are in addition to the required width of the access driveway or aisle.
    9. Each off-street loading space shall consist of a rectangular area not less than 3.7 meters (twelve feet) wide, 13.7 meters (forty-five feet) long, with a vertical clearance of not less than 4.3 meters (fifteen feet).
    10. Each parking and loading space shall have adequate drives, aisles, and turning and maneuvering areas for access and usability, and shall at all times have access to a public street or alley.
    11. Tandem parking shall be allowed only in the R-1 and R-E single-family residence districts, and in parking assessment areas as specified in Section 18.83.130.
    12. The slope of driveways shall not exceed 15 percent in the hazardous fire area (i.e., that area west of Interstate 280).
    13. Figure 3-5 and Table 3-10.
palo3.gif

 
 
Table 3. Parking Lot Layout Dimensions for Standard
Size Parking Stalls, 2.5-meter/8.5-foot Width (B)a
 
Dimension
On Diagram
Meters
Parking Angle (A)

45° 60° 75° 90° 

Feet
Parking Angle (A)

45° 60° 75° 90° 

Stall width, parallel to aisle
C
3.66
2.99
2.68
2.59
12.0
9.8
8.8
8.5
Stall length of line, wall
D
7.53
6.71
6.16
5.49
24.7
22.0
20.2
18.0
Stall length of line, interlock
D
6.58
6.16
5.94
5.49
21.6
20.2
19.5
18.0
Stall depth to wall
E
5.33
5.79
5.94
5.49
17.5
19.0
19.5
18.0
Stall depth to interlock
F
4.66
5.33
5.73
5.49
15.3
17.5
18.8
18.0
Aisle width between stall lines
G
3.96
5.49
7.62
8.53
13.0
18.0
25.0
28.0
Module, wall to wall
H
14.63
17.07
19.51
19.51
48
56
64
64
Module, wall to interlock
I
14.02
16.76
19.20
19.51
46
55
63
64
Module, interlocking
J
13.41
16.15
19.20
19.51
44
53
63
64
Bumper overhang (typical)
K
0.61
0.70
0.76
0.76
2.0
2.3
2.5
2.5
Offset
L
1.92
0.82
0.15
0.00
6.3
2.7
0.5
0.0
Setback
M
3.35
2.53
1.52
0.00
11.0
8.3
5.0
0.0
Cross aisle, one-way
N
4.27
4.27
4.27
4.27
14.0
14.0
14.0
14.0
Cross aisle, two-way
N
7.32
7.32
7.32
7.32
24.0
24.0
24.0
24.0
a. The required stall widths shall be increased by 0.15 meter/0.5 foot if a stall is immediately adjacent to a wall on one or both sides. If there are walls on both sides of a stall, the increase shall still be 0.15 meter/0.5 foot.

Table 4a. Parking Lot Layout Dimensions for Standard and
Compact Parking Stallsa,b,c for Various Stall Widths (Meters)
On Diagram:              
A
B
C
D/D'
E
F
G
H
I
J
Parking Dimensions, Meters
Parking Angle and Vehicle Size
 
Stall Width
Stall Width Parallel to Aisle
 
Stall Length
Stall Depth to Wall
Stall Depth to Interlock
Aisle Width Between Stall Lines
Module, Wall to Wall
Module, Wall to Interlock
Module, Interlock to Interlock
                   
45° Parking                
Standard
2.59
3.66
7.53/6.58
5.33
4.66
3.96
14.63
14.02
13.41
Standard
2.74
3.87
7.53/6.58
5.33
4.66
3.66
14.33
13.79
13.11
Standard
2.90
4.08
7.53/6.58
5.33
4.66
3.35
14.02
13.41
12.80
Compact
2.29
3.20
7.32/6.46
5.18
4.57
3.35
13.72
13.11
12.50
                   
60° Parking                
Standard
2.59
2.99
6.71/6.16
5.79
5.33
5.49
17.07
16.76
16.15
Standard
2.74
3.17
6.71/6.16
5.79
5.33
4.88
16.50
16.15
15.54
Standard
2.90
3.35
6.71/6.16
5.79
5.33
4.57
16.15
15.85
15.24
Compact
2.29
2.65
6.28/5.30
5.43
4.97
4.39
15.24
14.94
14.33
                   
75° Parking                
Standard
2.59
2.68
6.16/5.94
5.94
5.73
7.62
19.51
19.20
19.20
Standard
2.74
2.83
6.16/5.94
5.94
5.73
7.62
18.90
18.59
18.59
Standard
2.90
2.99
6.16/5.94
5.94
5.73
6.71
18.59
18.29
18.29
Compact
2.29
2.38
5.46/5.30
5.27
5.12
5.30
15.85
15.85
15.54
                   
90° Parking                
Standard 2.59
2.59
5.49/5.49
5.49
5.49
8.53
19.51
19.51
19.51
Standard 2.74
2.74
5.49/5.49
5.49
5.49
7.92
18.90
18.90
18.90
Standard 2.90
2.90
5.49/5.49
5.49
5.49
7.62
18.59
18.59
18.59
Compact 2.29
2.29
4.88/4.88
4.88
4.88
6.10
15.85
15.85
15.85
 

  1. Compact stalls may only be mixed with standard stalls. Compact Stalls shall not be utilized (mixed) with uni-class stalls (noted in Tables 5a and 5b) on the same site.
  2. See Table 6 for number of compact stalls permitted.
  3. The required stall widths shall be increased by 0.15 meter if a stall is immediately adjacent to a wall on one or both sides. If there are walls on both sides of a stall, the increase shall still be 0.15 meter.

Table 4b. Parking Lot Layout Dimensions for Standard and
Compact Parking Stallsa,b,c for Various Stall Widths (Feet)
On Diagram:              
A
B
C
D/D'
E
F
G
H
I
J
Parking Dimensions, Feetd
Parking Angle and Vehicle Size
 
Stall Width
Stall Width Parallel to Aisle
 
Stall Length
Stall Depth to Wall
Stall Depth to Interlock
Aisle Width Between Stall Lines
Module, Wall to Wall
Module, Wall to Interlock
Module, Interlock to Interlock
                   
45° Parking                
Standard
8.5
12.0
24.7/21.6
17.50
15.30
13.0
48
46
44
Standard
9.0
12.7
24.7/21.6
17.50
15.30
12.0
47
45
43
Standard
9.5
13.4
24.7/21.6
17.50
15.30
11.0
46
44
42
Compact
7.5
10.5
24.0/21.2
17.00
15.00
11.0
45
43
41
                   
60° Parking                
Standard
8.5
9.8
22.0/20.2
19.00
17.50
18.0
56
55
53
Standard
9.0
10.4
22.0/20.2
19.00
17.50
16.0
54
53
51
Standard
9.5
11.0
22.0/20.2
19.00
17.50
15.0
53
52
50
Compact
7.5
8.7
20.6/18.8
17.80
16.30
14.4
50
49
47
                   
75° Parking                
Standard
8.5
8.8
20.2/19.5
19.50
18.80
25.0
64
63
63
Standard
9.0
9.3
20.2/19.5
19.50
18.80
23.0
62
61
61
Standard
9.5
9.8
20.2/19.5
19.50
18.80
22.0
61
60
60
Compact
7.5
7.8
17.9/17.4
17.30
16.80
17.4
52
52
51
                   
90° Parking                
Standard 8.5
8.5
18.0/18.0
18.00
18.00
28.0
64
64
64
Standard 9.0
9.0
18.0/18.0
18.00
18.00
26.0
62
62
62
Standard 9.5
9.5
18.0/18.0
18.00
18.00
25.0
61
61
61
Compact 7.5
7.5
16.0/16.0
16.00
16.00
20.0
52
52
52
 

  1. Compact stalls may only be mixed with standard stalls. Compact Stalls shall not be utilized (mixed) with uni-class stalls (noted in Tables 5a and 5b) on the same site.
  2. See Table 6 for number of compact stalls permitted.
  3. The required stall widths shall be increased by 0.5 foot if a stall is immediately adjacent to a wall on one or both sides. If there are walls on both sides of a stall, the increase shall still be 0.5 foot.
  4. Module widths rounded to whole foot.
 
 
Table 5a. Parking Lot Layout Dimensions Uni-Class Parking Stallsa,b for Various Stall Widths (Meters)
On Diagram:              
A
B
C
D/D'
E
F
G
H
I
J
Parking Dimensions, Meters
Parking Angle and Vehicle Size
 
Stall Width
Stall Width Parallel to Aisle
 
Stall Length
Stall Depth to Wall
Stall Depth to Interlock
Aisle Width Between Stall Lines
Module, Wall to Wall
Module, Wall to Interlock
Module, Interlock to Interlock
                   
45° Parking                
 
2.59
3.66
7.44/6.46
5.28
4.57
3.96
14.63
14.02
13.11
 
2.74
3.87
7.44/6.46
5.28
4.57
3.66
14.33
13.79
12.80
 
2.90
4.08
7.44/6.46
5.28
4.57
3.35
14.02
13.41
12.50
                   
60° Parking                
 
2.59
2.99
7.74/7.10
5.64
5.18
5.49
16.76
16.50
15.85
 
2.74
3.17
7.74/7.10
5.64
5.18
4.88
16.15
15.85
15.24
 
2.90
3.35
7.74/7.10
5.64
5.18
4.57
15.85
15.54
14.94
                   
75° Parking                
 
2.59
2.68
6.37/6.16
5.64
5.49
7.01
18.29
17.98
17.68
 
2.74
2.83
6.37/6.16
5.64
5.49
6.71
17.98
17.68
17.37
 
2.90
2.99
6.37/6.16
5.64
5.49
6.40
17.68
17.37
17.07
                   
90° Parking                
  2.59
2.59
5.33/5.33
5.33
5.33
7.62
18.29
18.29
18.29
  2.74
2.74
5.33/5.33
5.33
5.33
7.32
17.98
17.98
17.98
  2.90
2.90
5.33/5.33
5.33
5.33
7.01
17.68
17.68
17.68
 
  1. Compact stalls (noted in Tables 4a and 4b) and uni-class stalls shall not be utilized (mixed) together on the same site.
  2. The required stall widths shall be increased by 0.15 meter if a stall is immediately adjacent to a wall on one or both sides. If there are walls on both sides of a stall, the increase shall still be 0.15 meter.
 
Table 5b. Parking Lot Layout Dimensions Uni-Class Parking Stallsa,b for Various Stall Widths (Feet)c
On Diagram:              
A
B
C
D/D'
E
F
G
H
I
J
Parking Dimensions, Feet
Parking Angle and Vehicle Size
 
Stall Width
Stall Width Parallel to Aisle
 
Stall Length
Stall Depth to Wall
Stall Depth to Interlock
Aisle Width Between Stall Lines
Module, Wall to Wall
Module, Wall to Interlock
Module, Interlock to Interlock
                   
45° Parking                
 
8.5
12.0
24.4/21.2
17.25
15.00
13.0
48
46
43
 
9.0
12.7
24.4/21.2
17.25
15.00
12.0
47
45
42
 
9.5
13.4
24.4/21.2
17.25
15.00
11.0
46
44
41
                   
60° Parking                
 
8.5
9.8
25.4/23.3
18.50
17.00
18.0
55
54
52
 
9.0
10.4
25.4/23.3
18.50
17.00
16.0
53
52
50
 
9.4
11.0
25.4/23.3
18.50
17.00
15.0
52
51
49
                   
75° Parking                
 
8.5
8.8
20.9/20.2
18.50
18.00
23.0
60
59
58
 
9.0
9.3
20.9/20.2
18.50
18.00
22.0
59
58
57
 
9.5
9.8
20.9/20.2
18.50
18.00
21.0
58
57
56
                   
90° Parking                
  8.5
8.5
17.5/17.5
17.50
17.50
25.0
60
60
60
  9.0
9.0
17.5/17.5
17.50
17.50
24.0
59
59
59
  9.5
9.5
17.5/17.5
17.50
17.50
23.0
58
58
58
 
  1. Compact stalls (noted in Tables 4a and 4b and uni-class stalls shall not be utilized (mixed) together on the same site.
  2. The required stall widths shall be increased by 0.5 foot if a stall is immediately adjacent to a wall on one or both sides. If there are walls on both sides of a stall, the increase shall still be 0.5 foot.
  3. Module widths rounded to whole foot.
 
Table 6. Maximum Allowable Number of Compact Car Parking Stalls
   
Total Stalls
in Parking Facility
Allowable Proportion
of Compact Car Stalls
   
0-4
0
5-49
25%
50-74
35%
75-99
40%
100 or greater
50%
 
 
Table 7. Driveway Dimensions (in Meters and Feet) For Multiple-family Residential Uses of 3 to 10 Units
         
 
Urban
Rural
Dimension
Meters
Feet
Meters
Feet
         
Width, excluding flares or curb radiusa,b      
Minimum (one-way)        
paved width
2.4
8
3.7
12
total widthc
3.0
10
3.7
12
Minimum (two-way)        
paved width
4.3
14
7.3
24
total widthc
4.9
16
7.3
24
Maximum (one-way)
6.1
20
9.1
30
Maximum (two-way)
10.1
33
10.7
35
         
Right turn radiusd        
Minimum
3.0
10
4.6
15
Maximum
9.1
30
15.2
50