Home maintenance for Aliso Viejo homeowners

Home maintenance help in Aliso Viejo

Homes in Aliso Viejo, at a glance

• When homes were built

  Homes counted

  About 20,507

  Built before 1970

  2.0%

  Built in the 1970s

  3.6%

  Built in the 1980s

  19.2%

  Built in the 1990s

  51.2%

  Built 2000 to 2009

  15.5%

  Built 2010 or later

  8.5%

  Detached houses

  36.4%

  Attached single-family homes

  24.5%

  Units in buildings of two or more

  About 38%

  At 25 to 35 years old, most are due for a first roof and original furnaces and air conditioners, and in an attached home the association's documents decide which of those are yours.

  Source: Census Reporter, ACS 2020-2024 five-year tables B25034, B25035 and B25024

• History

  Aliso Viejo was part of the 22,000-acre Moulton Ranch. The Mission Viejo Company bought the last 6,600 acres in 1976, the county approved the master plan in 1979, and the first homes went on sale by March 1982. Voters approved cityhood on March 6, 2001 with 93.3 percent in favor, and the city incorporated on July 1, 2001 as Orange County's 34th city.

  Source: City of Aliso Viejo, About Aliso Viejo

• Homeowners association (HOA) review

  The city handles building and safety, fire safety, planning, police and public works. The Aliso Viejo Community Association, a master homeowners association, maintains common areas including parks, greenbelts, parkways and slopes, and enforces the CC&Rs (covenants, conditions and restrictions), which the city says cover paint colors, property maintenance and many aesthetic issues. Association approval is a separate step from a city permit.

  Source: City of Aliso Viejo, Role of City and Aliso Viejo Community Association

• Expansive soil

  The city's residential submittal checklist, updated December 31, 2025, says expansive soils are common here and asks for footings at least 24 inches below undisturbed soil. It also says high sulfate levels are common, so concrete in contact with soil must be 4,500 psi with Type V cement and a water-cement ratio of 0.45.

  Source: City of Aliso Viejo Building Department, Residential Submittal Checklist

• Window and door permits

  Every door and window replacement needs a building permit, filed on the online portal as a residential windows and doors application. The city's handout warns that a retrofit window set inside the old frame shrinks the opening by about 7 inches each way, which matters for bedroom escape windows, and requires tempered windows in the High and Very High fire severity zones.

  Source: City of Aliso Viejo Building Department, Door and Window Replacements handout

• Fire service

  Fire protection comes from the Orange County Fire Authority. Station 57, at 57 Journey, houses five firefighters including two paramedics and serves as a division headquarters, and the city notes that most residential site improvements need some level of fire authority review.

  Source: City of Aliso Viejo, Fire Authority

Real neighborhoods in Aliso Viejo

Water, permits, and local rules in Aliso Viejo

• Wildfire zones

  The fire hazard map the city publishes, dated March 24, 2025, runs the Very High tier the length of the western side and around the south end, next to the wilderness park, with bands of High and then Moderate just inside it; the eastern part of the city is unzoned. The City Council adopted the maps by ordinance on May 21, 2025, and the Building and Safety page links a GIS address lookup.

  Source: Cal Fire Fire Hazard Severity Zones map for Aliso Viejo, published by the city

• Wildfire history

  The Aliso Fire of June 2, 2018 started along a canyon trail near Soka University, burned 175 acres by Cal Fire's count and forced evacuations in Aliso Viejo and Laguna Beach without damaging structures. The May 11, 2022 Coastal Fire started in the wilderness park and burned 202.10 acres, none inside the city, destroying 20 homes in Laguna Niguel. The city's hazard plan says major wildfires have affected Aliso Viejo about once every five years since 2001.

  Source: City of Aliso Viejo 2024 Local Hazard Mitigation Plan, with Cal Fire and the Orange County Fire Authority's after action report

• Landslides

  The hazard plan calls landslides and debris flows the dominant geologic risk, because the hills are shales and siltstones that weaken when wet. Most land was mass graded with slide areas stabilized by engineered fill, and some slopes exceed 30 percent. On February 25, 2005 the association-maintained Hollyleaf slope collapsed, leaving a 17-by-70-foot gap a few feet from two homes.

  Source: City of Aliso Viejo 2024 Local Hazard Mitigation Plan

• Earthquakes and liquefaction

  The Safety Element adopted March 4, 2026 finds no active faults, no Alquist-Priolo zones, no mapped tsunami zone and no dam inundation zone in the city. Shaking is the earthquake risk, with the San Joaquin Hills fault about 3.3 miles away. Liquefaction zones follow El Toro Road on the western border and the Aliso Creek watershed on the east, mostly in open space and parks.

  Source: City of Aliso Viejo General Plan Safety Element, adopted March 4, 2026

• Flood zones

  FEMA's 100-year and 500-year flood zones follow two channels: Aliso Creek on the east, near several parks and Aliso Niguel High School, and Wood Canyon along El Toro Road on the west. In December 2010, 14.90 inches of rain over six days pushed Wood Canyon's creek over its banks. FEMA's 2023 data shows 21 flood policies in the city, one paid loss and no repetitive loss properties.

  Source: City of Aliso Viejo 2024 Local Hazard Mitigation Plan

• Mello-Roos tax

  Mello-Roos is on most tax bills. The city has one district of its own, Community Facilities District 2005-01, covering a small number of properties with bonds maturing in 2038, and says two other Mello-Roos districts affect almost all properties in the city. The page does not name those two; your county tax bill lists them.

  Source: City of Aliso Viejo Financial Services, Mello-Roos

What OakTend does

Guides for Aliso Viejo homeowners

• Roof replacement cost

  Half the roofs here went on in the 1990s, and city rules allow no wood shake.

• Water heater replacement cost

  Imported water at 15.45 grains per gallon shortens tank life across the city.

• Santa Ana wind and wildfire prep

  For the Very High zone streets along Aliso and Wood Canyons Wilderness Park.

• Orange County home maintenance checklist

  Includes the slope drain and brush checks a canyon-edge lot needs before fall.

Adding an EV charger, heat pump or solar? See electrical panel upgrade cost.

Maintenance that matters in Aliso Viejo

• How to test smoke and carbon monoxide alarms

  The median Aliso Viejo home was built in 1995, so alarms that came with the house are past the 10 years the U.S. Fire Administration gives one.

• Fire hazard severity zones in Orange County

  Check whether your Aliso Viejo street is in a mapped fire hazard severity zone.

• How to clean your gutters before the rain

  Clear the gutters before the first rain and after a Santa Ana event.

Nearby cities

• Laguna Niguel
• Laguna Hills
• Laguna Woods
• Laguna Beach

Questions from Aliso Viejo homeowners

Local facts on this page last checked October 9, 2026.