Most single-family roof replacements in St. George and Washington County land somewhere between $9,000 and $30,000, and that spread is honest, not evasive. An architectural-shingle replacement on a single-story rambler sits near the bottom of it. A full tile re-felt or a standing-seam metal roof on a two-story home sits near the top. The material on your roof, the material going on next, and six specific cost drivers decide where in that range your home actually falls. This guide walks through all of them, so the estimates you collect make sense line by line.
Typical Market Ranges by Roofing Material
| Roof Type | Typical Installed Range (per square*) | Typical Whole-Roof Range** |
|---|---|---|
| Architectural asphalt shingle | $450 – $750 | $9,000 – $16,000 |
| Tile re-felt (reuse existing tile, replace underlayment) | $550 – $900 | $11,000 – $20,000 |
| New concrete tile | $900 – $1,500 | $18,000 – $30,000+ |
| Standing-seam metal | $900 – $1,600 | $18,000 – $32,000+ |
| Flat / low-slope membrane (TPO or similar) | $600 – $1,100 | Varies with deck condition |
| Elastomeric coating over sound flat roof | $150 – $350 | $3,000 – $8,000 |
*A "square" is roofing's unit of measure: 100 square feet of roof surface. A typical St. George single-story home runs 20–30 squares.
**Whole-roof figures reflect typical Washington County market pricing for single-family homes. They are market ranges, not quotes. Every real number starts with a measured, photographed inspection.
Two rows in that table are the ones St. George homeowners most often don't know exist. The tile re-felt is the middle path between "do nothing" and "all-new roof," available because concrete tile outlives the underlayment beneath it by decades: the tile is fine, the felt is finished, and replacing only the felt saves the difference. Our tile roofing page covers the re-felt in depth. The coating row is the flat-roof equivalent, available only while the existing membrane is still dry and sound, which is a condition with a deadline. The coat-or-replace decision lives on our flat roofing page.
The Six Drivers That Move Your Number
1. Tear-off
Removing the old roof is real labor and real disposal tonnage, and it scales with layers. A roof that was overlaid once already costs more to strip. Concrete tile tear-off costs more than shingle tear-off for the least mysterious reason in construction: each tile weighs roughly ten pounds, and there are thousands of them.
2. Pitch and stories
Steep pitches slow every trade and add safety rigging; second stories add staging and material hoisting. Two homes with identical square footage can differ by thousands on these two lines alone.
3. Decking condition
The plywood or plank deck under your roofing is priced by the sheet when replacement is needed, and nobody honestly knows how many sheets until tear-off exposes the deck. A written estimate should state the per-sheet price up front, so this line can never become a surprise.
4. Underlayment and heat
St. George's UV load and rooftop temperatures push many roofs here toward high-temperature-rated synthetic underlayments, especially under tile and metal. It's a real upgrade with a real line-item cost, and this climate is the textbook case for it.
5. Penetrations and complexity
Every vent, skylight, chimney, and evaporative cooler curb is flashing work. Complex rooflines with multiple valleys and dormers carry more of these than simple gable roofs, and valleys are where water concentrates and workmanship matters most.
6. Permits and disposal
Washington County municipalities require permits for roof replacement, and landfill disposal fees scale with tonnage, which is why tile disposal costs more than shingle. Both belong as visible lines on an honest estimate, not padding buried in "overhead."
Cost Questions With Straight Answers
Is overlaying new shingles over old ones a legitimate way to save money?
It's cheaper today and more expensive at every point after today. Overlays shorten the new roof's life through trapped heat, complicate leak diagnosis, and double the tear-off bill next time. Utah code limits how many layers a roof may carry, and most quality-focused roofers in this market will recommend against overlay even where code allows it.
Why did I get three estimates that are thousands apart?
Usually because they aren't bidding the same job. One includes deck repair allowances, high-temp underlayment, and new flashing; another reuses flashing and omits allowances, and the difference hides in what's not written down. Line-item estimates exist so you can compare scope, not just totals. Our roof replacement page walks through what a complete scope includes.
Does a new roof pay for itself when I sell?
Partially and situationally, but the real financial event is usually insurance: an aging roof is increasingly a policy-renewal problem, and impact-rated Class 4 shingles earn premium discounts from many insurers writing Utah policies. Ask your carrier what your roof's age is costing you now; that number belongs in the replacement math.
When is the cheapest time of year to replace a roof in St. George?
Winter, genuinely, and it's one of this market's quiet advantages. Roofing here continues year-round while northern Utah crews sit out the snow, and scheduling pressure eases outside monsoon season. Summer replacements happen daily, but crews start at dawn to beat rooftop temperatures for good reason.
What a Written Estimate Should Show You
A real estimate has your measured roof area, the material and underlayment specified by name, tear-off and disposal as visible lines, a stated per-sheet deck repair price, flashing scope, permit handling, and photos of the conditions driving each line. If any of those are missing from an estimate, ask why before you sign, whoever's letterhead is at the top. That includes ours.
Start With the Real Number
A free, photo-documented inspection turns every range on this page into one honest figure for your roof.
Schedule My Free Inspection Or call: 435-222-7141