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Onyx Building Group IncGeneral contractor in El Cajon, CA

Onyx Building Group Inc is a general contractor at 555 Raleigh Ave, El Cajon, CA 92020, rated 4.3 from 11 Google reviews. Open Monday to Friday.

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Call (619) 324-1440Website ↗

Key facts

Key facts about Onyx Building Group Inc
Address555 Raleigh Ave, El Cajon, CA 92020Get directions
Phone(619) 324-1440
Websiteonyxbuilding.com
HoursMonday to Friday: 7 AM – 5 PM
Google rating4.3 from 11 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • General Contractingmain tradeGoogle main category

Service area

Serves El Cajon and 11 towns within 25 miles: Bostonia, Casa de Oro-Mount Helix, Santee, Winter Gardens, La Mesa, Spring Valley, Rancho San Diego, Lakeside, Lemon Grove, Eucalyptus Hills and La Presa.

Based in El Cajon, CAView on map

Opening hours

Opening hours for Onyx Building Group Inc
DayHours
Monday7 AM – 5 PM
Tuesday7 AM – 5 PM
Wednesday7 AM – 5 PM
Thursday7 AM – 5 PM
Friday7 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.

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.3from 11 Google reviews

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Questions about Onyx Building Group Inc

What are Onyx Building Group Inc’s hours?

Onyx Building Group Inc is open Monday to Friday. Its listed hours are Monday to Friday, 7 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 Onyx Building Group Inc serve?

Serves El Cajon and 11 towns within 25 miles: Bostonia, Casa de Oro-Mount Helix, Santee, Winter Gardens, La Mesa, Spring Valley, Rancho San Diego, Lakeside, Lemon Grove, Eucalyptus Hills and La Presa. 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.

What do Google reviews say about Onyx Building Group Inc?

Onyx Building Group Inc has a rating of 4.3 from 11 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Onyx Building Group Inc?

Call Onyx Building Group Inc on (619) 324-1440. The business is at 555 Raleigh Ave, El Cajon, CA 92020. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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