Post-tension slab repair cost in Phoenix runs anywhere from about $500 for a single broken tendon to $50,000 or more for a major slab-leveling job with extensive underpinning — and that gap is exactly why so many Arizona homeowners feel blindsided by a quote. Foundation repair here is fulfilled by Concrete Repairman®, and the honest answer to “how much will this cost” always starts the same way: it depends on which problem you actually have.
Why post-tension repair costs span such a wide range
Post-tension (PT) slabs are reinforced with steel cables, or tendons, stressed inside plastic sheathing and anchored at the slab’s edge. When something goes wrong with a PT slab, it can mean one of three very different problems: a single tendon that snapped or lost tension, soil movement causing the whole slab to settle unevenly, or a combination of both. A snapped tendon near an accessible edge is a targeted, contained repair. A slab that has dropped an inch or more across a room because of expansive clay soil is a structural leveling project. Quoting “post-tension slab repair” as one price ignores that these are fundamentally different scopes of work, which is why published cost ranges look so wide — they’re really describing several different jobs.
Cost by problem type
Single broken tendon repair
A single broken or de-tensioned cable, caught early and located precisely, is usually the least expensive fix on the spectrum — often in the low hundreds to low thousands of dollars. The work involves exposing the anchor, releasing tension safely, splicing or replacing the damaged section, and re-stressing the tendon to spec. Cost climbs quickly if the break is mid-slab rather than at an accessible edge, since reaching it means more demolition and patching.
Slab leveling / underpinning
When the real issue is soil-driven settlement rather than a bad tendon, the fix shifts from cable repair to concrete leveling. Some contractors address large settlement with steel piers driven to bearing soil — an industry method, but not one Concrete Repairman® performs. Concrete Repairman® approaches settlement through targeted concrete leveling and, where the slab structure itself is compromised, coordinates tendon and reinforcement work alongside it. A leveling job that covers multiple rooms, or a slab affecting a garage or patio addition, is naturally going to land far above a one-tendon repair — this is where quotes reach into the tens of thousands.
What drives the price (access, engineering, extent)
A handful of factors move a post-tension repair up or down the cost scale more than anything else:
- Locating the tendons. Before anyone drills or cuts into a PT slab, the cables have to be mapped with ground-penetrating radar (GPR). Cutting a live, tensioned cable is a real safety hazard, so GPR locating is a non-negotiable line item, not an upsell.
- Access. A tendon anchor at the slab edge under an open patio is far cheaper to reach than one buried under a finished interior floor, tile, or a load-bearing wall.
- Engineering review. Any repair touching structural post-tension elements should involve engineering judgment on re-stressing sequence and load — that professional oversight is priced into the job, especially on multi-tendon or leveling work.
- Extent of the damage. One cable versus several, one room versus the whole slab, cosmetic cracking versus visible slab movement — extent is the single biggest swing factor in the final number.
- Finish restoration. Flooring, drywall, and patio surfaces disturbed during access and repair need to be patched or replaced, and that cost rides along with the structural work.
Arizona’s expansive clay soils make settlement-driven PT problems more common here than in many other markets, which is part of why post-tension slabs fail in Arizona more often than the national conversation around PT construction suggests. A Phoenix plumbing repair that requires slab penetration is a frequent trigger for a subsequent tendon issue, since a cable nicked or cut during that work has to be properly repaired and re-stressed afterward.
James Belville, founder of Concrete Repairman®, has spent more than 30 years diagnosing Arizona foundation problems using ICRI/ACI-aligned practices — and the firm’s 5.0-star rating across 269 Google reviews reflects a track record built on getting the diagnosis right before the price is set.
Why a written estimate follows an inspection
No honest post-tension repair number exists before someone has actually located the tendons, assessed whether the movement is a cable problem or a soil problem, and measured the extent of it. That’s why Concrete Repairman® starts every project with a foundation inspection rather than a phone-quote guess. The inspection determines which category the repair falls into — a contained tendon fix, a leveling project, or both — and only then does a written estimate get put together with real numbers attached to real scope. If you want a broader sense of how PT costs compare to other foundation repair cost categories in Phoenix, that’s a useful starting point before booking an inspection.
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→ Request a Written EstimateFrequently Asked Questions
How much does post-tension slab repair cost?
Typical Phoenix-area post-tension repairs range from around $500 for a straightforward single-tendon fix to $50,000 or more for a major slab-leveling project involving multiple areas and significant reinforcement work. Where a specific job falls in that range depends on the number of tendons affected, access, and whether soil settlement is also involved.
How much does it cost to fix a broken tendon?
A single broken tendon, especially one located near an accessible edge, is generally the lower end of the cost spectrum — often a few hundred to a few thousand dollars once GPR locating, the splice or replacement, and re-stressing are all accounted for. Mid-slab breaks that require more demolition to reach cost more.
Why is post-tension repair so expensive?
PT repair carries costs that ordinary crack repair doesn’t: GPR locating to avoid cutting a live cable, engineering oversight on re-stressing, and finish restoration once the slab is reopened. On larger jobs, the price also reflects that the real fix is slab leveling for settlement, not just patching a cable — a structural scope, not a cosmetic one.
Is a post-tension slab worth repairing?
In almost every case, yes. Repairing a damaged tendon or leveling a settled PT slab is dramatically less expensive than the alternative of slab replacement, and it addresses the safety concern of an unstressed or corroding cable directly. An inspection will confirm whether the slab’s structural integrity can be restored with targeted repair, which is the outcome in the large majority of Phoenix cases.
Does insurance cover post-tension slab repair?
It depends on the cause and the policy. Sudden, accidental damage — such as a cable cut during unrelated plumbing work — is more likely to have coverage discussion than gradual soil-settlement damage, which most standard homeowner policies exclude. A written estimate with a documented cause is what an insurer will typically ask for, so getting that paperwork from the inspection matters either way.
Get a written estimate for post-tension slab repair
Guessing at a post-tension repair cost from a description over the phone isn’t realistic — GPR locating and a hands-on inspection are what turn a wide published range into an actual number for your slab. Concrete Repairman® can walk your Phoenix property, locate the tendons, and put a written estimate together based on what’s actually happening under your slab. Learn more about the post-tension slab repair process, or visit the contact page to book an inspection.