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Building Department

The Alamosa Building Department ensures a safe, resilient, and high-quality built environment for the entire community. Our core mission is to protect public well-being and investment by working collaboratively with residents and contractors. We achieve this by conducting thorough plan reviews, issuing necessary permits, and performing critical inspections to guarantee that all construction—new developments and modifications—strictly adheres to current life-safety, fire, structural, and energy codes. We are your partner in preserving property value and building a safer future for Alamosa. 

Local Climate & Design Specs

Winter

  • Ground Snow Load: 30
  • Winter Design Temp: −16°F
  • Ice barrier underlayment is required in valleys and at eaves.
  • Air Freezing Index: 3000
  • Mean Annual Temp: 45°F
HVAC 
2018 International Residential Code (IRC)
CHAPTER 3 BUILDING PLANNING
TABLE R301.2(1)
CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
GROUND
SNOW
LOADo
WIND DESIGN SEISMIC
DESIGN
CATEGORYf
SUBJECT TO DAMAGE FROM WINTER
DESIGN
TEMPe
ICE BARRIER
UNDERLAYMENT
REQUIREDh
FLOOD
HAZARDSg
AIR FREEZING
INDEXi
MEAN ANNUAL
TEMPj
Speedd
(mph)
Topographic
effectsk
Special wind
regionl
Wind-borne
debris zonem
Weatheringa Frost line
depthb
Termitec
MANUAL J DESIGN CRITERIAn
Elevation Latitude Winter
heating
Summer
cooling
Altitude
correction factor
Indoor design
temperature
Design temperature
cooling
Cooling temperature
difference
Wind velocity
heating
Wind velocity
cooling
Coincident
wet bulb
Daily
range
Winter
humidity
Summer
humidity

Source: Adapted from the 2018 International Residential Code (IRC), Table R301.2(1), Climatic and Geographic Design Criteria. This table is provided for reference and jurisdictional data entry only and is not a substitute for the official code. For the authoritative language, see ICC IRC 2018 Section R301.2 .

For SI: 1 pound per square foot = 0.0479 kPa, 1 mile per hour = 0.447 m/s.

  1. a.Where weathering requires a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code, the frost line depth strength required for weathering shall govern. The weathering column shall be filled in with the weathering index, “negligible,” “moderate” or “severe” for concrete as determined from Figure R301.2(4). The grade of masonry units shall be determined from ASTM C34, C55, C62, C73, C90, C129, C145, C216 or C652.
  2. b.Where the frost line depth requires deeper footings than indicated in Figure R403.1(1), the frost line depth strength required for weathering shall govern. The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade.
  3. c.The jurisdiction shall fill in this part of the table to indicate the need for protection depending on whether there has been a history of local subterranean termite damage.
  4. d.The jurisdiction shall fill in this part of the table with the wind speed from the basic wind speed map [Figure R301.2(5)A]. Wind exposure category shall be determined on a site-specific basis in accordance with Section R301.2.1.4.
  5. e.The outdoor design dry-bulb temperature shall be selected from the columns of 971/2-percent values for winter from Appendix D of the International Plumbing Code. Deviations from the Appendix D temperatures shall be permitted to reflect local climates or local weather experience as determined by the building official. [Also see Figure R301.2(1).]
  6. f.The jurisdiction shall fill in this part of the table with the seismic design category determined from Section R301.2.2.1.
  7. g.The jurisdiction shall fill in this part of the table with (a) the date of the jurisdiction’s entry into the National Flood Insurance Program (date of adoption of the first code or ordinance for management of flood hazard areas), (b) the date(s) of the Flood Insurance Study and (c) the panel numbers and dates of the currently effective FIRMs and FBFMs or other flood hazard map adopted by the authority having jurisdiction, as amended.
  8. h.In accordance with Sections R905.1.2R905.4.3.1R905.5.3.1R905.6.3.1R905.7.3.1 and R905.8.3.1, where there has been a history of local damage from the effects of ice damming, the jurisdiction shall fill in this part of the table with “YES.” Otherwise, the jurisdiction shall fill in this part of the table with “NO.”
  9. i.The jurisdiction shall fill in this part of the table with the 100-year return period air freezing index (BF-days) from Figure R403.3(2) or from the 100-year (99 percent) value on the National Climatic Data Center data table “Air Freezing Index-USA Method (Base 32°F).”
  10. j.The jurisdiction shall fill in this part of the table with the mean annual temperature from the National Climatic Data Center data table “Air Freezing Index-USA Method (Base 32°F).”
  11. k.In accordance with Section R301.2.1.5, where there is local historical data documenting structural damage to buildings due to topographic wind speed-up effects, the jurisdiction shall fill in this part of the table with “YES.” Otherwise, the jurisdiction shall indicate “NO” in this part of the table.
  12. l.In accordance with Figure R301.2(5)A, where there is local historical data documenting unusual wind conditions, the jurisdiction shall fill in this part of the table with “YES” and identify any specific requirements. Otherwise, the jurisdiction shall indicate “NO” in this part of the table.
  13. m.In accordance with Section R301.2.1.2 the jurisdiction shall indicate the wind-borne debris wind zone(s). Otherwise, the jurisdiction shall indicate “NO” in this part of the table.
  14. n.The jurisdiction shall fill in these sections of the table to establish the design criteria using Table 1a or 1b from ACCA Manual J or established criteria determined by the jurisdiction.
  15. o.The jurisdiction shall fill in this section of the table using the Ground Snow Loads in Figure R301.2(6).

This table is a reformatted reference based on Table R301.2(1) of the 2018 International Residential Code (IRC). It is not a substitute for the official code and may not include all requirements, exceptions, or local amendments. The authoritative source is the International Code Council (ICC): IRC 2018 Section R301.2 .

The City of Alamosa has adopted the following codes:

IBC 2018  |   IRC 2018 |    IMC  2018 |   IECC 2018
IFC 2018  |   IPMC 2018  IEBC 2018  |  ICCA 2009

The State of Colorado has adopted the following codes:

NEC 2023  |   IPC 2021 |  IFGC 2021

Schedule an Inspection

To schedule an inspection or meeting with the building inspector, please call the office at (719) 589-6631.

The administrative assistants will work with you to schedule a time.

Inspections need to be scheduled at least one day in advance, and they will take place between 10am and 4pm.

Electrical and plumbing inspections are not completed by our office, they are done by the state.

Learn More about electrical and plumbing permits.

Permit Fee Schedules 
What Can I Do Without a Permit? 

A PERMIT IS NEEDED FOR EVERYTHING except the following… 

  • One-story detached accessory structures used as tool and storage shed, playhouses and similar uses, provided the floor area does not exceed 200 square feet
  • Fences not over 7 feet high
  •  Oil derricks
  • Retaining walls which are not over 4 feet height measured from the bottom of the footing to the top wall, unless supporting a surcharge or impounding Class I, II, or III-A liquids
  • Water tanks that are supported directly on grade if the capacity does not exceed 5,000 gallons and the ratio of height to diameter or width does not exceed 2 to 1
  • Sidewalks and driveways (these may require a ROW permit from Public Works)
  • Painting, papering, tiling, carpeting, cabinets, counter tops, and similar finish work
  • Temporary motion picture, television, and theater stage sets and scenery
  • Prefabricated swimming pools that are less than 24 inches deep
  • Shade cloth structures constructed for nursery or agricultural purposes and not including service systems
  • Swings and other playground equipment accessory to detached one- and two family dwellings
  • Window awnings supported by an exterior wall which do not project more than 54 inches from the exterior wall and do not require additional support of Group R3, as applicable in section 101.2, and Group U occupancies
  • Movable cases, counters, and partitions not over 5 feet 9 inches in height
  • Decks not exceeding 200 square feet in area, not more than 30 inches above grade at any point, not attached to a dwelling, and that do not serve the exit door required by section R 311.4
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