Foundation Repair
Broken Piers, Failing Supports, or Damage Under Your Home?
Cal Star repairs mobile home foundations across Southern California — damaged piers and pads, failed supports, moisture problems, earthquake bracing, and 433A retrofits under homes that are already on site.
Warning Signs
Signs Something Under Your Home Needs Repair
Foundation problems in mobile homes usually show up gradually under the home before they spread inside. If you notice any of these, it is worth having Cal Star inspect underneath before the damage gets worse.
- Visible leaning, cracked, or sunken piers under the home
- Wood or concrete pads that have shifted, cracked, or broken apart
- Moisture, standing water, or a torn vapor barrier under the home
- Rust, rot, or failed supports and braces
- Gaps appearing around trim, cabinets, or skirting
- Cracks in interior walls or ceiling seams
- Insurance company asking for earthquake bracing documentation
- Lender, buyer, or title company asking for a permanent foundation or 433A
Real Results
Pier Replacement: Before and After
A failed pier puts uneven weight on the rest of the home. Cal Star replaces damaged piers and pads so the structure carries load evenly again.
BeforeAfterdrag the orange handle or use the slider below.
How We Inspect
We Look Under the Home Before Recommending Repairs
Foundation repair starts with understanding what failed underneath — not guessing from symptoms inside the home. Cal Star inspects piers, pads, supports, and moisture conditions before any work is scoped.
Our crews go under the home and document what they find: cracked or leaning piers, failed pads, moisture intrusion, and anything that is no longer carrying load the way it should.
When leveling is part of the repair plan, Cal Star also measures the frame with a hydrostatic water level so adjustments are based on real readings — not a visual guess from the floor above.
- 1
Set the reference point
The reservoir is filled and placed at a fixed benchmark so the crew has a consistent zero to measure from.
- 2
Read each corner
The hose end is moved to piers and frame points around the home to check elevation at every support.
- 3
Compare the readings
The water line shows how far each section has settled relative to the reference — down to small fractions of an inch.
- 4
Plan the repair
Those measurements tell us which piers need adjustment, how much to shim, and what needs to be replaced.
Hydrostatic water level 
Reading elevation under the home
The Fix
What Cal Star Fixes
Our crews inspect the full support system under your home and repair what is actually causing the problem — not just the symptom you can see.
Pier & Pad Repair
We repair or replace damaged piers, pads, and blocks that have shifted, cracked, or sunk over time.
Support & Brace Replacement
Failed supports and braces are replaced so the weight of the home is carried evenly across the foundation.
Earthquake Resistant Bracing System
We install earthquake bracing systems that help secure your mobile home to its foundation. This work is becoming more important as some insurance companies now ask homeowners to show proof of earthquake-resistant bracing before renewing a policy.
Permanent Foundation & 433A
If a lender or buyer needs a 433A, Cal Star retrofits a qualifying permanent foundation under your existing home and helps with the documentation. We do not install or set new mobile homes.
Learn about permanent foundations & 433AMoisture & Vapor Barrier Repair
Moisture under the home accelerates foundation damage. We repair vapor barriers as part of a lasting fix.
Re-Leveling When Needed
If supports have settled and the frame is out of level, Cal Star can bring the home back to level as part of the repair — or see our dedicated re-leveling page if settling is your main concern.
Permanent Foundation
433A Foundation Specialist — Retrofit for Existing Homes
If a lender, buyer, or title company has asked for a 433A on a home that is already on the property, you are in the right place. Cal Star does not install or set new mobile homes.
A 433A is the permanent foundation document used with manufactured and mobile homes in California. Once the foundation under an existing home meets the required standards, the form is stamped and recorded with the county. Lenders and buyers often require it before a loan or sale can move forward.
Cal Star retrofits permanent foundation systems under homes that are already on site and helps homeowners through the 433A documentation path. We explain what your home needs, what the paperwork is for, and how it fits into your estimate — in plain language.
- Permanent foundation retrofit under existing mobile homes
- We do not install, set, or place new manufactured homes
- 433A documentation help for loans, refinances, and sales
- Clear written estimates with senior, veteran & first responder discounts
Why It Matters
Why Foundation Problems Should Not Wait
A mobile home's foundation carries everything else — the structure, the plumbing, the flooring, and the roofline. When piers fail or supports rot, the stress moves into the rest of the home. Small gaps become wall cracks. A soft spot under one corner becomes a plumbing leak.
In Southern California, earthquake bracing is also worth taking seriously. Some insurance companies are now asking homeowners to show proof of an earthquake-resistant bracing system before renewing coverage. Cal Star can inspect what you have, install bracing where it is needed, and help you understand what documentation may be required.
If you are selling, refinancing, or converting how the home is titled, a permanent foundation and 433A may be part of that process. Catching foundation issues early almost always costs less than repairing the damage they cause later. If your main concern is sloping floors or sticking doors rather than visible pier damage, our re-leveling service may be the better place to start — Cal Star handles both.
Need a 433A for a home that's already on site?
Cal Star retrofits a qualifying permanent foundation under existing mobile homes and helps with 433A documentation. We do not install or set new homes.
See permanent foundation & 433A services
Our Process
What Happens After You Request an Estimate?
- 01
Request an Estimate
Call or send the form. It takes about a minute.
- 02
We Review Your Project
A team member reaches out to understand what is going on.
- 03
On-Site Inspection
We look at the actual problem — not just the symptom.
- 04
Clear Proposal
You get a straightforward estimate with no pressure.
- 05
Professional Repair or Remodel
Experienced crews complete the work and clean up after.
Related Services
Homeowners Also Ask About
Service Areas
Where We Provide Foundation Repair
FAQ
Foundation Repair Questions, Answered
How do I know if my mobile home needs foundation repair?
The most common signs are visible damage under the home — leaning or cracked piers, failed pads, moisture, or rusted supports — along with interior cracks or gaps that keep getting worse. The only way to know for sure is an inspection underneath, which Cal Star provides as part of a free estimate.
How does Cal Star measure whether a mobile home is level?
Cal Star uses a hydrostatic water level — a reservoir connected to a long hose filled with water. Because water in the hose always settles to the same height, the crew can compare the water line at different points under the home and see exactly how much each section has settled. It is more accurate than eyeballing the floor and works well in the tight spaces under a mobile home.
How long does mobile home foundation repair take?
Most pier, pad, and re-leveling work is completed quickly once the inspection is done and materials are on site. Your estimate will include a clear timeline for your specific home.
What is a 433A?
A 433A is the permanent foundation document used with manufactured and mobile homes in California. After a qualifying permanent foundation is in place under the home, the form is stamped and recorded with the county. Lenders and buyers often ask for it by name when a home is being financed or sold. Cal Star retrofits permanent foundations under existing homes and helps with the 433A documentation process. We do not install or set new mobile homes.
Does Cal Star install permanent foundations and handle 433A paperwork?
Yes — as a retrofit under a mobile home that is already on the property. Cal Star is a 433A Foundation Specialist. We do not install, set, or place new manufactured homes. If your home is already on site and a lender or title company has asked for a 433A, request a free estimate.
Can Cal Star install an earthquake bracing system on my mobile home?
Yes. Cal Star installs earthquake resistant bracing systems designed to help secure a mobile home to its foundation. If your insurance company has asked for proof of earthquake bracing, mention that when you request your estimate so we can inspect your home and explain what is needed.
Do you offer discounts?
Yes. Cal Star offers senior, veteran, and first responder discounts. Mention it when you request your estimate.
Reviews
What Foundation Repair Customers Say
“Met with David Harris who inspected our home and he did a thorough job in explaining what repairs were needed for our foundation.”
Review 1 of 4
Free Estimate
Request a Free Foundation Repair Estimate
Tell us a little about your project and a member of the Cal Star team will get back to you. Estimates are always free.
- Free, no-pressure estimates
- Senior, veteran & first responder discounts
- Locally owned & operated in Corona, CA
Need Help With Your Mobile Home?
Free estimates. Clear answers. Crews who specialize in mobile homes.
Free estimates · Licensed & insured · CSLB #989323 · Serving Southern California since 2014