Earlier editions: 2026-09
Title 14 — BUILDING REGULATIONS
La Mesa Municipal Code Ch. 14.12 Residential Code
La Mesa Municipal Code · 2026-10 edition · updated 2026-10-04 · La Mesa
Cite as: La Mesa Municipal Code Chapter 14.12 · Text as of 2026-10-04
Footnotes:
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Editor's note— Ord. 2019-2874, § 8, adopted November 12, 2019, repealed ch. 14.12, §§ 14.12.010—14.12.040 and enacted a new ch. 14.12 as set out herein. Former ch. 14.12 pertained to similar subject matter and derived from Ord. 2016-2849, § 7, adopted November 22, 2016.
14.12.010 - Adoption of the California Residential Code.¶
There is hereby adopted by reference the California Residential Code, 2025 Edition (Part 2.5, Title 24, California Code of Regulations), incorporating the International Residential Code, 2024 Edition, published by the International Code Council. Said document is hereby adopted as the Residential Code of the city of La Mesa for regulating the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, maintenance, removal and demolition of every detached one- and two-family dwelling, efficiency dwelling unit, and townhouse not more than three stories above grade plane in height with a separate means of egress and structures accessory thereto within the city of La Mesa. There is one copy of said Code on file in the office of the city clerk for use and examination by the public as required by law.
(Ord. 2019-2874, § 8, November 12, 2019; Ord. 2022-2900, § 7, November 22, 2022; Ord. 2025-2923, § 7, December 9, 2025)
14.12.020 - Climatic and geographic design criteria.¶
Table R301.2(1) of the California Residential Code, 2022 Edition, adopted by reference in Section 14.12.010 hereof is hereby amended to read as follows:
TABLE R301.2(1) CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
| GROUND SNOW LOAD | WIND DESIGN | WIND DESIGN | SEISMIC DESIGN CATE- GORY | SUBJECT TO DAMAGE FROM | SUBJECT TO DAMAGE FROM | SUBJECT TO DAMAGE FROM | WINTER DESIGN TEMP e | ICE BARRIER UNDERLAYMENT REQUIRED h | FLOOD HAZARD g | AIR FREEZ- ING INDEX i | MEAN ANNUAL TEMP j |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GROUND SNOW LOAD | Wind Speed d (mph) | Topo- graphic effects k | SEISMIC DESIGN CATE- GORY | Weathering a | Frost line Depth b | Termite c | WINTER DESIGN TEMP e | ICE BARRIER UNDERLAYMENT REQUIRED h | FLOOD HAZARD g | AIR FREEZ- ING INDEX i | MEAN ANNUAL TEMP j |
| Zero | 95 | No | D 1 | Negligible | 12" | Very Heavy | 44;deg;F | No | Footnote 'g' | Zero | 63.4;deg;F |
For SI: 1 pound per square foot = 0.0479kPa, 1 mile per hour = 0.447m/s.
Footnotes:
a. Weathering may require a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code. The weathering column shall be filled in with the weathering index (i.e., "negligible, "moderate" or "severe") for concrete as determined from the Weathering Probability Map [Figure R301.2(3)]. The grade of masonry units shall be determined from ASTM C34, C55, C62, C73, C90, C129, C145, C216 or C652.
b. The frost line depth may require deeper footings than indicated in Figure R403.1(1). The jurisdiction shall fill in the frost depth column with the minimum depth of footing below finish grade.
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.
d. The jurisdiction shall fill in this part of the table with the wind speed from the basic wind speed map [Figure R301.2(4)]. Wind exposure category shall be determined on a site-specific basis in accordance with Section R301.2.1.4.
e. Temperatures shall be permitted to reflect local climates or local weather experience as determined by the Building Official.
f. The jurisdiction shall fill in this part of the table with the seismic design category determined from Section R301.2.2.1.
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), i.e., city of La Mesa Ordinance 2002-2721 06/25/2002,
(b) the date(s) of the Flood Insurance Study, i.e., Study date 01/31/2001 adopted by Ordinance 2002-2721;
(c) the panel numbers and dates of all currently effective FIRMs and FBFMs or other flood hazard map adopted by the authority having jurisdiction, as amended, i.e., Panel 06073C1643H current effective date 09/28/2006; Panel 06073C1644G current effective date 09/05/2006.
h. In accordance with Sections R905.2.7.1, R905.4.3.1, R905.5.3.1, R905.6.3.1, R905.7.3.1 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".
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%) value on the National Climatic Data Center data table "Air Freezing Index - USA Method (Base 32o)" at www.ncdc.noaa.gov/fpsf.html.
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 32oF)" at www.ncdc.noaa.gov/fpsf.html.
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.
(Ord. 2019-2874, § 8, November 12, 2019; Ord. 2022-2900, § 7, November 22, 2022; Ord. 2025-2923, § 7, December 9, 2025)
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