The Low Density Residential Zone is intended for areas which are physically isolated from the developed portions of the City, and for which extension of sewer and water services would be prohibitively expensive; however, all new sewer and water connections for a proposed development shall comply with all City regulations. Lands in this zone must be able to support development with on-site sewage disposal systems, and comply with all local, state and federal requirements. Agriculture, open space and residential uses will be permitted in this zone subject to wetlands, weak foundation soils, and active dune constraints.
The following uses and their accessory uses are permitted in the R-40 zone if the Community Development Director determines that the uses conform to the standards in Sections 16.24.040 through 16.24.050, applicable Development Code standards, and other City laws:
A. 
Single-family detached dwelling.
B. 
Modular home.
C. 
Manufactured home subject to the standards in Chapter 16.168.
D. 
Residential home.
E. 
Residential (care) facility.
F. 
Day care.
G. 
Farming, grazing, truck gardening, orchards and production of nursery stock.
H. 
A temporary dwelling for no more than six months while building a permanent residence.
I. 
Accessory structure, no larger than 1,200 square feet, in conjunction with an existing residence on the same property, and subject to standards of Chapter 16.180.
J. 
Transportation facilities and improvements subject to the standards of Section 16.20.040.
K. 
Similar uses as stated above.
L. 
Community garden(s) (see definitions).
M. 
Incidental sales of firewood, cut flowers, produce grown on the premises, lemonade, and similar items.
N. 
Home occupations.
O. 
Accessory dwelling that complies with Section 16.180.040.
P. 
Homestay lodging subject to the standards in Chapter 8.24.
(Ord. 1175-A § 2, 2013; Ord. 1221 § 2, 2018; Ord. 1248 § 2, 2021)
The following uses and their accessory uses may be permitted in the R-40 zone when approved under Chapter 16.220:
A. 
Government buildings and uses, subject to standards of Sections 16.24.040(C) and 16.24.050.
B. 
Public utility structure.
C. 
Golf course.
D. 
Parks, playground and community center.
E. 
Bed and breakfast.
F. 
Church, synagogue, or other place of worship.
G. 
Master planned development with a minimum lot size of three contiguous acres, subject to the provisions in Chapter 16.224.
H. 
Accessory dwelling that complies with Section 16.180.040.
I. 
Child care center.
J. 
Similar uses as stated above.
(Ord. 1175-A § 3, 2013)
The following development standards are applicable in the R-40 zone:
A. 
Density Provisions.
1. 
Minimum lot area for residences with on-site sewage disposal systems: 40,000 square feet.
2. 
Minimum lot area for residences connected to the City of Warrenton sewer system: 10,000 square feet.
3. 
Minimum lot width at the front building line: 50 feet.
4. 
Minimum lot depth: 80 feet.
5. 
Not more than 35% of lot area shall be covered by buildings or other impervious surfaces, except as may be permitted by conditional use permit or variance.
6. 
Maximum building height: 30 feet.
7. 
Maximum building height for agricultural buildings, solar collectors, wind energy systems and radio receivers: 40 feet.
B. 
Setback Requirements.
1. 
Minimum front yard setback:
a. 
Lots of 40,000 square feet: 20 feet;
b. 
Lots of 10,000 square feet: 15 feet.
2. 
Minimum side yard setback: 10 feet.
3. 
Corner lot minimum street side, side yard setback: 10 feet.
4. 
Minimum rear yard setback: 10,000 square foot lot, 15 feet; except accessory structures that meet the criteria of Section 16.280.020, may extend to within five feet of the rear property line; and for 40,000 square foot lots the dwelling and any accessory structure must maintain a 15-foot setback.
5. 
Corner lot minimum rear yard setback: 10 feet.
C. 
Government Building. The following development standards are applicable:
1. 
Density provisions:
a. 
Minimum lot size, government building/uses: none.
b. 
Minimum lot width, government building/uses: none.
c. 
Minimum lot depth, government building/uses: none.
d. 
Maximum building height: 45 feet.
e. 
Maximum lot coverage, government building/uses: none.
2. 
Setback requirements:
a. 
Minimum front and rear yard setback, government building: 15 feet.
b. 
Minimum side yard setbacks, government building: 10 feet.
3. 
Landscaping requirements shall comply with Chapter 16.124 of the Development Code.
4. 
Any government building shall comply with Chapter 16.116 of the Development Code.
A. 
Outside sales and service areas shall be approved by the Warrenton Planning Commission if not enclosed by suitable vegetation, fencing or walls.
B. 
Outside storage areas shall be enclosed by suitable vegetation, fencing or walls, in conformance with Chapter 16.124.
C. 
All uses shall comply with access and parking standards in Chapters 16.116 and 16.128 except as may be permitted by conditional use or variance.
D. 
Signs shall comply with standards in Chapter 16.144.
E. 
All development shall comply with the wetland and riparian area protection standards of Chapter 16.156.
F. 
All other applicable Development Code requirements shall also be satisfied.
G. 
All uses must comply with parking standards in Chapter 16.128.
H. 
All uses must comply with the criteria of Chapter 16.124, Landscaping, Street Trees, Fences and Walls.
I. 
Manufactured homes must comply with the criteria of Section 16.168.010.
J. 
A garage or carport is required and shall conform to the standards of Chapter 16.180.
K. 
All new sewer and water connections for a proposed development shall comply with all City regulations.