El Mirage, AZ Foundation Crack & Settlement Repair

El Mirage then and now

El Mirage began as a small farming settlement on the west bank of the Agua Fria River, and for most of its history it stayed small. That changed in the 2000s, when large subdivisions filled in much of the city in just a few years. Today the vast majority of El Mirage homes date from that building boom, with a small number of older homes in the original townsite.

That history tells us a lot before we ever arrive. A 2000s El Mirage home is almost certainly on a post-tension slab. It’s probably on a fairly flat lot with narrow side yards. And it’s now old enough that driveways, patios and the soil around the foundation have had fifteen to twenty years to react to irrigation and storm water.

The Agua Fria River and El Mirage soils

The City of El Mirage sits along the Agua Fria River, which forms the eastern edge of the city. Rivers in the desert build their floodplains from layers of sand, silt and gravel laid down by floods, and those layers can vary a lot over short distances. Where subdivisions were graded on or near river-deposited soils, builders often placed fill to level the lots, and fill under flatwork tends to be less compacted than fill under the house.

What that means in practice:

• Soil conditions can change from one lot to the next, so two identical homes on the same street may behave differently
• Driveways and patios over fill often settle before the house does
• Water that soaks into loose, layered soil can cause it to compress, especially where it concentrates along one side of the house

The Arizona Geological Survey describes this kind of behavior in its guidance on problem soils, noting that loose, dry desert deposits can collapse when wetted.

Flat lots and drainage

El Mirage is flat, and flat lots don’t shed water on their own. When a monsoon storm drops heavy rain in a short time, water that can’t run off quickly ponds against the stem wall or in narrow side yards between houses. Add downspouts that discharge right at the foundation and drip emitters in planter beds against the stucco, and one side of the slab can stay wet for days.

Those are the conditions behind most of the foundation calls we get from El Mirage: a driveway dropping at the garage, a back patio tilting toward the house, drywall cracks above doors on one side, or doors that drift out of square.

El Mirage neighborhoods we serve

• Original El Mirage townsite (south of Thunderbird Road): the city’s oldest homes, some predating modern slab practices, where stem wall cracks and older plumbing come up
• Rancho El Mirage: 2000s subdivisions with post-tension slabs and HOA-maintained common areas
• El Mirage Road and Thunderbird Road corridor: dense 2000s neighborhoods with narrow side yards where drainage between homes is a frequent issue

The neighborhoods around Gateway Park, one of the city’s main parks, are typical of El Mirage’s newer housing: post-tension slabs, irrigated landscaping and plenty of concrete flatwork that is now reaching the age when settlement shows.

Living near Luke Air Force Base

El Mirage lies north of Luke Air Force Base, and the broader area falls within the Arizona Department of Water Resources’ West Valley land-subsidence area. The Arizona Geological Survey also maps earth fissures in its study area around the base. That’s regional information, not a statement about any El Mirage street. Most El Mirage foundation problems still come from local drainage and soil moisture, but buyers can check an address on the state’s hazard viewer, and we’re happy to show you how.

Foundation repair services in El Mirage

Because El Mirage’s housing stock is so consistent, the same few services cover most homes:

• Post-tension slab repair, including radar scanning to locate tendons before any drilling, and repair of corroded anchors or broken tendons
• Drainage and soil stabilization for flat lots, narrow side yards and downspouts that send water toward the slab
• Foundation crack repair for slab and stem wall cracks, after the cause has been identified

What to check in your El Mirage home

You can do a quick check yourself before calling:

1. Walk the side yards after watering or a storm and look for standing water against the house.
2. Check where each downspout discharges, and whether it lands on bare soil next to the foundation.
3. Look at the garage-to-driveway joint for a step or a widening gap.
4. Open and close interior doors, noting any that stick or won’t latch.
5. Look along the slab edge for grout patches with rust stains, which can signal post-tension anchor corrosion.

If you find more than one of these, an evaluation with floor-elevation readings will tell you whether the slab has moved and why.

HOAs and exterior work

Many El Mirage neighborhoods have homeowners associations with rules about landscaping, grading and exterior changes. Drainage work such as regrading or adding surface drains sometimes needs association approval, so check before scheduling. We can provide a written description of the proposed work to include with your request.

Building permits in El Mirage

The City of El Mirage issues its own building permits through its development services staff. Structural foundation work such as piering generally requires a permit and may require an engineer’s plan. Confirm current requirements with the city before work starts.

Nearby service areas

El Mirage sits just across the Agua Fria from Youngtown, whose 1950s homes are a sharp contrast to El Mirage’s newer tracts, and borders Surprise to the west and north, where post-tension slabs and drainage issues look very similar. Visit our service areas page to see every community we cover.

El Mirage foundation repair FAQs