382 general contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Alton: STL Mount, CR Score 62/100; 5.0★ from 211 Google reviews; open 24/7.
Best for emergencies (open 24/7): Shipley's Helping Hand General Contracting and Landscape, posts 24/7 hours; ranked #3 of 382.
Most-reviewed: The Container Store, 412 Google reviews at 4.4★, the most of 382 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
382 Alton general contractors are ranked here by CR Score, from ten published factors. 14 are open 24/7, 90 open Saturdays and 42 open Sundays, based on posted hours. The median Google rating is 4.7★ across 382 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | STL Mount | 62 | 5.0★ (211) | Fairview Heights, 19 mi away | 24/7 | Overall |
| 2 | The Container Store | 58 | 4.4★ (412) | St. Louis, 20 mi away | Sat · Sun · Evenings | Most reviews |
| 3 | Shipley's Helping Hand General Contracting and Landscape | 58 | 5.0★ (21) | Hazelwood, 12 mi away | 24/7 | Emergencies |
| 4 | Schultz Contracting | 58 | 4.8★ (70) | Florissant, 9 mi away | Sat · Evenings | — |
| 5 | Miller Environmental Mitigation LLC | 57 | 4.9★ (52) | Glen Carbon, 15 mi away | Sat · Sun | — |
| 6 | Closets by Design - St. Louis | 57 | 4.5★ (293) | Maryland Heights, 19 mi away | Sat | — |
| 7 | Irish Construction St. Louis | 57 | 4.6★ (226) | Bridgeton, 20 mi away | Sat | — |
| 8 | More For Less Remodeling | 55 | 5.0★ (216) | St. Louis, 25 mi away | — | — |
| 9 | Pat Gallagher Enterprises | 55 | 4.6★ (27) | Creve Coeur, 20 mi away | 24/7 | — |
| 10 | Challenge Unlimited | 55 | 4.0★ (67) | Alton | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 211 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 20 mi away
Ranked #2 because of its Google rating and review volume: 4.4★ from 412 Google reviews, the most in Alton.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hazelwood, 12 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florissant, 9 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 70 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glen Carbon, 15 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 52 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Maryland Heights, 19 mi away
Ranked #6 because of its Google rating and trade focus: 4.5★ from 293 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 20 mi away
Ranked #7 because of its Google rating and trade focus: 4.6★ from 226 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 25 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 216 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Creve Coeur, 20 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 27 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alton
Ranked #10 because of its Google rating and trade focus: 4.0★ from 67 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brentwood, 19 mi away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 29 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Granite City, 12 mi away
Ranked #12 because of its Google rating and review volume: 5.0★ from 85 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Alton, 20 mi away
Ranked #13 because of its Google rating and trade focus: 4.4★ from 19 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 22 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 15 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 18 mi away
Ranked #15 because of its Google rating and trade focus: 4.4★ from 13 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Florissant, 11 mi away
Ranked #16 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 20 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 19 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 79 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 18 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 20 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wood River, 6 mi away
Ranked #20 because of its Google rating and trade focus: 4.3★ from 12 Google reviews, listed on Google as “Construction company”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in East Alton, 4 mi away
Ranked #21 because of its Google rating and trade focus: 3.8★ from 13 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Saint Louis, 17 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 54 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 18 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 64 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Alton
Ranked #24 because of its Google rating and trade focus: 4.5★ from 4 Google reviews, listed on Google as “Contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in O'Fallon, 23 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Typical prices in USD, adjusted for Illinois with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Kitchen remodel | $13,850 | $25,610 | $39,490 | Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 0.95 East North Central factor (2025 Cost vs. Value Report) | October 2026 |
| Bathroom remodel | $6,340 | $11,580 | $16,830 | Per bathroom: typical range of customer-reported remodels. US national range × 0.95 East North Central factor (2025 Cost vs. Value Report) | October 2026 |
We scored 382 Alton general contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Alton data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |