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Best Siding Contractors in O'Fallon, IL (2026)

226 siding contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in O'Fallon: Accredited Roofing, CR Score 59/100; 4.9★ from 298 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Westside Construction, posts 24/7 hours; ranked #2 of 226.

  3. 3

    Most-reviewed: Advocate Construction, 833 Google reviews at 4.8★, the most of 226 ranked; ranked #3.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

226 O'Fallon siding contractors are ranked here by CR Score, from ten published factors. 35 are open 24/7, 119 open Saturdays and 55 open Sundays, based on posted hours. The median Google rating is 4.7★ across 226 rated businesses.

Most of this list also appears on the Siding contractors in Belleville ranking. See Siding contractors in Belleville

Top 10 siding contractors in O'Fallon at a glance

Top 10 siding contractors in O'Fallon at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Accredited Roofing594.9★ (298)Fairview Heights, 3 mi away24/7Overall
2Westside Construction594.8★ (175)St. Louis, 26 mi away24/7Emergencies
3Advocate Construction584.8★ (833)St. Louis, 27 mi away—Most reviews
4L&D Wilson's Siding & Roofing Inc564.8★ (50)Collinsville, 6 mi away——
5Hulsey Roofing564.8★ (251)St. Louis, 21 mi away24/7—
6Storm Guard Roofing & Construction of SW St. Louis554.9★ (393)Murphy, 31 mi away24/7—
7Colonial Construction554.9★ (128)St. Louis, 24 mi away——
8Revolve Construction554.8★ (24)St. Louis, 26 mi awaySat · Sun · Evenings—
9SunSent Roofing554.7★ (57)Saint Charles, 35 mi awaySat · Sun · Evenings—
10Cardinal Contractors554.8★ (634)Saint Peters, 39 mi away24/7—

The 226 best siding contractors in O'Fallon, ranked

Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in O'Fallon

    #1 Accredited Roofing

    Based in Fairview Heights, 3 mi away

    59/100CR Score

    Ranked #1 because of its Google rating and review volume: 4.9★ from 298 Google reviews.

    • 4.9★ from 298 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    705 Lincoln Hwy, Fairview Heights, IL 62208
    View profile for Accredited Roofing(618) 616-7515

  2. #2 Westside Construction

    Based in St. Louis, 26 mi away

    59/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.8★ from 175 Google reviews, listed on Google as “Siding contractor”.

    • 4.8★ from 175 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    9463 Dielman Rock Island Industrl Dr, St. Louis, MO 63132
    View profile for Westside Construction(314) 250-6250

  3. #3 Advocate Construction

    Based in St. Louis, 27 mi away

    58/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.8★ from 833 Google reviews, listed on Google as “Siding contractor”.

    • 4.8★ from 833 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    Address
    1280 Research Blvd, St. Louis, MO 63132
    View profile for Advocate Construction(314) 266-6811

  5. #5 Hulsey Roofing

    Based in St. Louis, 21 mi away

    56/100CR Score

    Ranked #5 because of its Google rating and review volume: 4.8★ from 251 Google reviews.

    • 4.8★ from 251 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3810 Paule Ave, St. Louis, MO 63125
    View profile for Hulsey Roofing(314) 846-7663

  7. #7 Colonial Construction

    Based in St. Louis, 24 mi away

    55/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.9★ from 128 Google reviews, listed on Google as “Siding contractor”.

    • 4.9★ from 128 Google reviews
    Hours
    Mon–Fri 9 AM–4 PM · Sat–Sun closed
    Address
    10120 Fite Cir, St. Louis, MO 63123
    View profile for Colonial Construction(314) 725-6080

  9. #9 SunSent Roofing

    Based in Saint Charles, 35 mi away

    55/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.7★ from 57 Google reviews, listed on Google as “Siding contractor”.

    • 4.7★ from 57 Google reviews
    Hours
    Mon–Fri 7:30 AM–7:30 PM · Sat 8 AM–5 PM · Sun 9 AM–5 PM
    Address
    1710 Scherer Pkwy, St Charles, MO 63303
    View profile for SunSent Roofing(636) 242-5905

  12. #12 Total Roofing

    Based in St. Louis, 31 mi away

    55/100CR Score

    Ranked #12 because of its Google rating and review volume: 5.0★ from 198 Google reviews.

    • 5.0★ from 198 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    12747 Olive Blvd Suite 300, St. Louis, MO 63141
    View profile for Total Roofing(618) 719-6767

  13. #13 Lagunas Roofing

    Based in Fairview Heights, 3 mi away

    54/100CR Score

    Ranked #13 because of its Google rating and review volume: 4.7★ from 256 Google reviews.

    • 4.7★ from 256 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat 10 AM–1 PM · Sun closed
    Address
    2 Lexington Dr, Fairview Heights, IL 62208
    View profile for Lagunas Roofing(618) 300-5661

  18. #18 WCC Roofing Co.

    Based in Valley Park, 32 mi away

    54/100CR Score

    Ranked #18 because of its Google rating and review volume: 4.8★ from 221 Google reviews.

    • 4.8★ from 221 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    34 Front St, Valley Park, MO 63088
    View profile for WCC Roofing Co.(636) 226-4483

  20. #20 John Beal Roofing

    Based in Maryland Heights, 32 mi away

    53/100CR Score

    Ranked #20 because of its Google rating and review volume: 4.5★ from 466 Google reviews.

    • 4.5★ from 466 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    12181 Prichard Farm Rd, Maryland Heights, MO 63043
    View profile for John Beal Roofing(314) 625-9741

  21. #21 Renovation Team

    Based in Creve Coeur, 29 mi away

    53/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.8★ from 76 Google reviews, listed on Google as “Siding contractor”.

    • 4.8★ from 76 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat–Sun closed
    Address
    656 Office Pkwy, Creve Coeur, MO 63141
    View profile for Renovation Team(636) 939-1061

  22. #22 Alenco Inc.

    Based in Ballwin, 29 mi away

    53/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.4★ from 239 Google reviews, listed on Google as “Siding contractor”.

    • 4.4★ from 239 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    5 Cassens Ct, Fenton, MO 63026
    View profile for Alenco Inc.(314) 480-6264

  23. #23 Grace Exteriors

    Based in Kirkwood, 29 mi away

    53/100CR Score

    Ranked #23 because of its Google rating and trade focus: 3.7★ from 10 Google reviews, listed on Google as “Siding contractor”.

    • 3.7★ from 10 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1710 Fenpark Dr, Fenton, MO 63026
    View profile for Grace Exteriors(636) 600-9999

How much do siding contractors cost in O'Fallon?

Typical prices in USD, adjusted for Illinois with a published regional index. Each row names its basis and month.

How much do siding contractors cost in O'Fallon?
JobLowTypicalHighBasisChecked
Siding replacement$5,930$12,360$18,900Per house: typical range of customer-reported projects. US national range × 1.07 East North Central factor (2025 Cost vs. Value Report)October 2026

How we ranked O'Fallon siding contractors

We scored 226 O'Fallon siding 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn O'Fallon data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

Siding contractors in O'Fallon: frequently asked questions

Who is the best siding contractor in O'Fallon?

By CR Score, the highest-ranked siding contractor in O'Fallon, IL is Accredited Roofing with a CR Score of 59/100. It has 4.9★ from 298 Google reviews. It is open 24/7. Westside Construction (#2) and Advocate Construction (#3) follow. We ranked 226 siding contractors on ten factors, last updated October 22, 2026.

Which siding contractors in O'Fallon are open 24/7?

35 ranked siding contractors in O'Fallon post 24/7 hours. The highest-ranked are Accredited Roofing (#1), Westside Construction (#2) and Hulsey Roofing (#5). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which siding contractors in O'Fallon work on weekends?

119 of 226 ranked siding contractors post Saturday hours and 55 post Sunday hours. The highest-ranked open Saturdays are Accredited Roofing (#1), Westside Construction (#2) and Hulsey Roofing (#5). Posted hours are office hours; crews may book weekend jobs separately.

How much does siding replacement cost in O'Fallon?

Siding replacement typically costs $5,930 to $18,900, with $12,360 typical (Per house: typical range of customer-reported projects. US national range × 1.07 East North Central factor (2025 Cost vs. Value Report)). The range is adjusted for Illinois. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do O'Fallon siding contractors have?

The median Google rating among 226 rated siding contractors in O'Fallon is 4.7★, with a median of 34 reviews. Advocate Construction has the most, 833 reviews, and ranks #3. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank siding contractors?

Each siding contractor gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Do siding contractors outside O'Fallon count in this ranking?

Yes, if they are within 40 mi of the O'Fallon city center, our service radius for siding contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.

Can siding contractors pay to rank higher on ContractorsRanked?

No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.

Update log for O'Fallon

  1. October 2026: CR Scores recalculated for 226 siding contractors serving O'Fallon.
  2. October 2026: 1 duplicate listing merged.

More siding contractors and O'Fallon pages

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