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Law Office of Sean M. O’NeillGeneral practice lawyer in Newark, CA

Law Office of Sean M. O’Neill is a general practice lawyer at 39899 Balentine Dr #200, Newark, CA 94560, ranked #26 of 585 general practice lawyers in Newark and rated 5.0 from 7 Google reviews. Open 7 days a week.

Facts on this profile come from public sources and from the firm. This is not legal advice, and contacting the firm does not make it your lawyer. Check the lawyer’s standing with the state bar or law society before you hire.

Newark, CAUpdated 0 paid placements in any rankingHow we rank

Call (510) 933-8321Website ↗

Key facts

Key facts about Law Office of Sean M. O’Neill
Address39899 Balentine Dr #200, Newark, CA 94560Get directions
Phone(510) 933-8321
Websiteoneillplc.com
HoursMonday to Thursday: 9 AM – 5 PM; Friday to Sunday: 10 AM – 6 PM
Google rating5.0 from 7 Google reviews

Practice areas

Each practice area shows the evidence we matched it on.

Service area

Serves Newark and 11 towns within 25 miles: Fremont, Union City, Milpitas, East Palo Alto, Palo Alto, Mountain View, Sunnyvale, Fairview, Hayward, Menlo Park and Los Altos.

Based in Newark, CAView on map

Opening hours

Opening hours for Law Office of Sean M. O’Neill
DayHours
Monday9 AM – 5 PM
Tuesday9 AM – 5 PM
Wednesday9 AM – 5 PM
Thursday9 AM – 5 PM
Friday10 AM – 6 PM
Saturday10 AM – 6 PM
Sunday10 AM – 6 PM
  • Open evenings — no
  • Open Saturdays
  • Open Sundays

Questions about Law Office of Sean M. O’Neill

How is Law Office of Sean M. O’Neill ranked in Newark?

Law Office of Sean M. O’Neill is ranked #26 of 585 general practice lawyers in Newark by LFR Score, with 63 out of 100 as of November 2026. The score weighs reputation, bar status, review volume, recency, availability, practice focus, proximity, claimed profile and law firms ranked reviews. No business can pay to change its rank.

What are Law Office of Sean M. O’Neill’s hours?

Law Office of Sean M. O’Neill is open 7 days a week. Its listed hours are Monday to Thursday, 9 AM – 5 PM; Friday to Sunday, 10 AM – 6 PM. On Saturdays it is open 10 AM to 6 PM, and on Sundays 10 AM to 6 PM. Hours come from the business listing; holiday hours may differ.

What areas does Law Office of Sean M. O’Neill serve?

Serves Newark and 11 towns within 25 miles: Fremont, Union City, Milpitas, East Palo Alto, Palo Alto, Mountain View, Sunnyvale, Fairview, Hayward, Menlo Park and Los Altos. The list is based on the business's location and the usual service radius for general legal matters. Confirm your address is covered when you call.

What do Google reviews say about Law Office of Sean M. O’Neill?

Law Office of Sean M. O’Neill has a rating of 5.0 from 7 Google reviews. The LFR 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 Law Office of Sean M. O’Neill?

Call Law Office of Sean M. O’Neill on (510) 933-8321. The business is at 39899 Balentine Dr #200, Newark, CA 94560. Its website is linked in the key facts on this page. Ask how the firm charges before the first meeting, and keep confidential details for after its conflict check.

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Compare nearby general practice lawyers

Law Office of Sean M. O’Neill compared with nearby businesses
BusinessRankLFR ScoreGoogle ratingSaturdaySundayDistance away
Law Office of Sean M. O’Neill (this business)—635.0 (7)YesYes
Gimbel Law Firm PC#24635.0 (74)NoNo12.0 mi
The Law Offices of Nadeem H Makada#25634.9 (184)NoNo19.6 mi
Noel Hibbard Law Office#27634.7 (92)——16.8 mi

See all 585 ranked general practice lawyers in Newark