How much does it cost to repipe a condo building per unit?

Multifamily repipes are typically priced per unit, with national costs of roughly $3,000-$8,000 per unit including drywall repair. In the expensive Bay Area market, contractors quote $2,500-$5,000 per unit for the pipe work itself, with larger buildings getting lower per-unit pricing through volume. Single condo units repiped individually can run $4,000-$15,000.

How long do pipes last before an HOA needs a repipe?

Copper piping generally lasts 40-70 years, PEX and CPVC roughly 40-50 years, and galvanized steel 40-50 years though it often fails sooner from internal corrosion. Polybutylene pipe (installed widely in the late 1970s-1990s) is a known failure risk at 25-30 years and should be prioritized for replacement. Water chemistry and pressure can shorten any of these ranges.

Should an HOA reserve study include plumbing replacement?

Yes — many state statutes require reserving for any common component with a remaining useful life under 30 years, and piping qualifies in most buildings older than about 20 years. In practice many reserve studies omit plumbing entirely, leaving boards to fund a six- or seven-figure project with special assessments or 15-20 year loans. Ask your reserve analyst to add piping once the building passes roughly 25-30 years of age.

Mechanical & Utilities

Common-Area Plumbing Repipe: Useful Life & Replacement Cost for HOAs

Domestic water piping typically lasts 40-60 years before a full repipe, at roughly $3,000-$8,000 per residential unit including wall repair and repainting. Cost is driven by pipe material (PEX versus copper), unit size, building configuration, and access; buildings with galvanized steel or polybutylene pipe often need replacement sooner, at 25-40 years. Per-unit pricing usually drops as building size increases because crews gain volume efficiency.

Last verified 2026-07-06

Typical useful life

40–60 years

2026 replacement cost

$3,000–$8,000

per unit (residential), national range

Typical HOA quantity

24-unit building repipe

Reserve budgeting

Quantify by counting total residential units served by common piping, and confirm the reserve study actually includes piping — many studies omit it entirely, which is a leading cause of surprise special assessments and emergency loans. Keep a leak log; once pinhole leaks recur annually, cumulative repair and water-damage costs usually justify moving the repipe forward. Phasing by building or riser stack spreads cost across several fiscal years.

Extending its life

Keep system water pressure below about 80 psi with a working pressure-reducing valve, since high velocity erodes copper. Monitor water chemistry (aggressive or softened water accelerates pinhole corrosion), inspect exposed piping in mechanical rooms annually, and repair and document every leak so the board can spot failure trends early.

Regional variation

High-labor markets like the Bay Area, Los Angeles, and the Northeast run 25-50% above national averages, and slab-on-grade or high-rise construction adds access cost anywhere.

Estimate your common-area plumbing repipe budget

National 2026 ranges · verify with local bids.

Quantity (per unit (residential))

Typical small HOA: 24-unit building repipe

Replacement cost range$72,000 – $192,000

Suggested annual set-aside$1,200 – $4,800/yr

Set-aside = replacement cost ÷ useful life (40–60 years). A new installation funds toward the long end; an aging one needs catch-up funding — run the full calculator for that.

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Common-Area Plumbing Repipe questions, answered

Sources

Retrieved and verified 2026-07-06. National planning ranges — local bids govern. Informational only; not engineering, legal, or financial advice, and not a substitute for a professional reserve study. Report a data issue.

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