Tankless Water Heater Installation cost: Billings vs Brentwood (2026)
In 2026, tankless water heater installation is about 2% more expensive in Billings than in Brentwood. Most homeowners pay around $4,200 in Billings versus $4,100 in Brentwood — a gap of roughly $100.
Billings MT
Typically around $4,200
Brentwood TN
Lower costTypically around $4,100
Billings vs Brentwood: full breakdown
| Factor | Billings | Brentwood |
|---|---|---|
| Typical 2026 cost | $4,200 | $4,100 |
| Estimated range | $2,650–$5,700 | $2,550–$5,600 |
| Labor index (vs US) | ×0.96 | ×0.97 |
| Climate zone | Cold | Mixed |
| Climate factor | ×1.04 | ×1 |
| Local permit | $150 | $150 |
| Labor share | $2,300 | $2,250 |
| Materials/equipment | $1,900 | $1,850 |
Tankless water heater installation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Is the price difference a dealbreaker?
2% is within noise for tankless water heater installation — contractor selection and timing move the price more than which of these two metros you're in.
Tankless water heater installation by type: Billings vs Brentwood
We localize each tankless water heater installation type separately for both metros, applying the same labor, climate and permit adjustments each time, so you're comparing like for like.
| Type | Billings | Brentwood |
|---|---|---|
| Gas tankless | $3,150–$6,600 | $3,050–$6,450 |
| Electric tankless | $1,850–$3,350 | $1,800–$3,250 |
Tankless water heater installation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Tankless water heater installation by flow rate (GPM): Billings vs Brentwood
Tankless units are sized by flow rate — gallons per minute (GPM) — rather than tank size. Add up the fixtures you'd run at once: a shower is ~2 GPM, so a larger household needs a higher-GPM unit (or two).
| Size | Billings | Brentwood |
|---|---|---|
| 5–7 GPM (1–2 people, 1 bath) | $2,350–$4,350 | $2,300–$4,200 |
| 7–9 GPM (2–3 people, 2 baths) | $2,750–$5,000 | $2,650–$4,900 |
| 9–11 GPM (3–4 people, 2–3 baths) | $3,150–$5,500 | $3,050–$5,400 |
| 11+ GPM (5+ people / whole-home) | $3,650–$6,000 | $3,550–$5,850 |
Treat these as 2026 localized estimates for tankless water heater installation, not quotes from a contractor.
What water heaters pros earn in each metro
About 55% of a tankless water heater installation bill goes to labor, so wage differences between these two metros matter more than almost anything else. These are real, government-sourced (BLS OEWS) installer wages, not estimates.
No BLS metro wage series for Billings; we use Montana regional price parity instead.
Nashville-Davidson--Murfreesboro--Franklin metro · about 6% below the US average installer wage.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
Cheapest time for tankless water heater installation in either city
Winter is when tanks fail most, because cold incoming water and heavy demand push an aging unit past its limit — right when everyone needs an emergency replacement at emergency prices. Swap it proactively in a slower month instead.
Tank or tankless — and what should you budget?
The format choice drives both upfront cost and lifetime value. How our editors think about it.
The simple-swap case
When money is the constraint and the existing tank has kept up with the household, dropping in the same fuel type and capacity is the least disruptive move. No venting rework, no new gas line, no panel space to find — a plumber can pull the old unit and set the new one before lunch.
The tankless case
The tankless premium buys longevity and endless supply: nothing sitting hot around the clock, a lifespan roughly double a tank's, and no cold showers when demand spikes. The catch lives in the setup, since most retrofits need a bigger gas line or an electrical upgrade first. Larger households planning to stay put recover that cost fastest.
The heat-pump case
A heat-pump (hybrid) water heater costs the most upfront but slashes operating cost and earns the strongest utility rebates where offered — the long-run winner where the install location suits it.
There's no universally "best" water heater — only the one that fits your budget and timeline. Tight budget, go tank; want endless hot water, go tankless; optimizing for the lowest bill, go heat-pump.
Billings vs Brentwood
Is tankless water heater installation cheaper in Billings or Brentwood?
Yes — Billings costs more. Expect around $4,200 for tankless water heater installation there against $4,100 in Brentwood, about $100 (2%) apart in 2026.
Why does tankless water heater installation cost more in Billings than Brentwood?
The main driver is local labor rates: Billings's labor index is 0.96 versus 0.97 in Brentwood. Climate zone (cold vs mixed) also shift the total.
How much is tankless water heater installation in Billings, MT?
In Billings, tankless water heater installation typically runs $2,650–$5,700 in 2026, with most homeowners paying around $4,200.
When is the cheapest time to buy tankless water heater installation — and does it differ by city?
It doesn't vary by location — Spring and early fall is the discount window in both Billings and Brentwood (roughly 5–10% off), while deep winter (failure season) tends to be the most expensive in either city.
Should I choose where to live based on tankless water heater installation cost?
Rarely. The $100 difference is real but one-time, and you can often close most of it in Billings by buying in the off-season and getting tighter, apples-to-apples bids. Ongoing factors — energy prices, climate and home condition — matter more over the life of the system.
Compare tankless water heater installation in other cities
Updated June 2026 · By Serhat Özçelik