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Cornerstone CompanyGeneral contractor in Altadena, CA

Cornerstone Company is a general contractor in Altadena, CA. Open Monday to Friday.

Altadena, CA0 paid placements in any rankingHow we rank

Call (626) 577-5400Website ↗

Key facts

Key facts about Cornerstone Company
Phone(626) 577-5400
Websitecornerstonecompany.net
HoursMonday to Friday: 8 AM – 5 PM

Trades

Each trade shows the evidence we matched it on.

  • General Contractingmain tradeGoogle main category
  • Kitchen Remodeladditional Google category
  • Bathroom Remodeladditional Google category
  • Water Damage Restorationadditional Google category
  • Home Builderadditional Google category

Service area

Serves Altadena and 12 towns within 25 miles: Lomita, West Carson, Carson, Rolling Hills Estates, San Pedro, Torrance, Palos Verdes Estates, Rancho Palos Verdes, Long Beach, Redondo Beach, Gardena and Alondra Park.

Based in Altadena, CAView on map

Opening hours

Opening hours for Cornerstone Company
DayHours
Monday8 AM – 5 PM
Tuesday8 AM – 5 PM
Wednesday8 AM – 5 PM
Thursday8 AM – 5 PM
Friday8 AM – 5 PM
SaturdayClosed
SundayClosed
  • Open evenings — no
  • Open Saturdays — no
  • Open Sundays — no

Typical general contracting prices

Typical general contracting prices
JobLowTypicalHigh
Kitchen remodelPer project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.04 Pacific factor (2025 Cost vs. Value Report)$15,240$28,190$43,470
Bathroom remodelPer bathroom: typical range of customer-reported remodels. US national range × 1.06 Pacific factor (2025 Cost vs. Value Report)$7,050$12,880$18,720

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

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Questions about Cornerstone Company

What are Cornerstone Company’s hours?

Cornerstone Company is open Monday to Friday. Its listed hours are Monday to Friday, 8 AM – 5 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does Cornerstone Company serve?

Serves Altadena and 12 towns within 25 miles: Lomita, West Carson, Carson, Rolling Hills Estates, San Pedro, Torrance, Palos Verdes Estates, Rancho Palos Verdes, Long Beach, Redondo Beach, Gardena and Alondra Park. The list is based on the business's location and the usual service radius for general contracting. Confirm your address is covered when you call.

How do I contact Cornerstone Company?

Call Cornerstone Company on (626) 577-5400. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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