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Best Foundation Repair Companies in Grinnell, IA (2026)

5 foundation repair companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Grinnell: American Perfection Basement Waterproofing, CR Score 61/100; 4.6★ from 24 Google reviews; open 24/7.

  2. 3

    Best for emergencies (open 24/7): Millmiers Home Improvement, posts 24/7 hours; ranked #3 of 5.

  3. 2

    Most-reviewed: The Hawkeye State Foundation Repair Co, 24 Google reviews at 4.0★, tied for the most of 5 ranked; ranked #2.

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

5 Grinnell foundation repair companies are ranked here by CR Score, from ten published factors. 3 are open 24/7, 4 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.6★ across 5 rated businesses.

Top 5 foundation repair companies in Grinnell at a glance

Top 5 foundation repair companies in Grinnell at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1American Perfection Basement Waterproofing614.6★ (24)Clive, 35 mi away24/7Overall
2The Hawkeye State Foundation Repair Co524.0★ (24)Altoona, 39 mi awaySun · EveningsMost reviews
3Millmiers Home Improvement514.6★ (11)Oskaloosa, 36 mi away24/7Emergencies
4Kendra's Remediation495.0★ (6)Clive, 37 mi away24/7—
5Kahuna Boys LLC455.0★ (3)Altoona, 37 mi awaySat · Sun · Evenings—

The 5 best foundation repair companies in Grinnell, 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.

  5. #5 Kahuna Boys LLC

    Based in Altoona, 37 mi away

    45/100CR Score

    Ranked #5 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Roofing contractor”.

    • 5.0★ from 3 Google reviews
    Hours
    Mon–Sun 7 AM–10:45 PM
    Address
    2097 NE 88th St, Altoona, IA 50009
    View profile for Kahuna Boys LLC(515) 210-3296

How much do foundation repair companies cost in Grinnell?

National price ranges in USD, not adjusted for Grinnell. Each row names its basis and the month we checked it.

How much do foundation repair companies cost in Grinnell?
JobLowTypicalHighBasisChecked
Foundation repair$2,225$5,174$8,133Per project: typical range of customer-reported repairs. US national rangeOctober 2026

How we ranked Grinnell foundation repair companies

We scored 5 Grinnell foundation repair companies 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 Grinnell 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

Foundation repair companies in Grinnell: frequently asked questions

Who is the best foundation repair company in Grinnell?

By CR Score, the highest-ranked foundation repair company in Grinnell, IA is American Perfection Basement Waterproofing with a CR Score of 61/100. It has 4.6★ from 24 Google reviews. It is open 24/7. The Hawkeye State Foundation Repair Co (#2) and Millmiers Home Improvement (#3) follow. We ranked 5 foundation repair companies on ten factors, last updated October 22, 2026.

How many foundation repair companies are there in Grinnell?

ContractorsRanked ranks 5 foundation repair companies serving Grinnell, IA. Counts are as of October 2026.

Which foundation repair companies in Grinnell are open 24/7?

3 ranked foundation repair companies in Grinnell post 24/7 hours. The highest-ranked are American Perfection Basement Waterproofing (#1), Millmiers Home Improvement (#3) and Kendra's Remediation (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which foundation repair companies in Grinnell work on weekends?

4 of 5 ranked foundation repair companies post Saturday hours and 5 post Sunday hours. The highest-ranked open Saturdays are American Perfection Basement Waterproofing (#1), Millmiers Home Improvement (#3) and Kendra's Remediation (#4). Posted hours are office hours; crews may book weekend jobs separately.

How much does foundation repair cost in Grinnell?

Foundation repair typically costs $2,225 to $8,133, with $5,174 typical (Per project: typical range of customer-reported repairs. US national range). This is a national range, not adjusted for Grinnell. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Grinnell foundation repair companies have?

The median Google rating among 5 rated foundation repair companies in Grinnell is 4.6★, with a median of 11 reviews. American Perfection Basement Waterproofing has the most, 24 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank foundation repair companies?

Each foundation repair company 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 foundation repair companies outside Grinnell count in this ranking?

Yes, if they are within 40 mi of the Grinnell city center, our service radius for foundation repair companies. 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.

Update log for Grinnell

  1. October 2026: CR Scores recalculated for 5 foundation repair companies serving Grinnell.

More foundation repair companies and Grinnell pages