Skip to content
ContractorsRanked

KOSL BUILDING GROUPGeneral contractor in Mamaroneck, NY

KOSL BUILDING GROUP is a general contractor at 875 Mamaroneck Ave, Mamaroneck, NY 10543, rated 4.5 from 16 Google reviews. Open Monday to Friday.

Mamaroneck, NY0 paid placements in any rankingHow we rank

Call (914) 777-0007Website ↗

Key facts

Key facts about KOSL BUILDING GROUP
Address875 Mamaroneck Ave, Mamaroneck, NY 10543Get directions
Phone(914) 777-0007
Websitekoslbuilding.com
HoursMonday to Friday: 8 AM – 4 PM
Google rating4.5 from 16 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • General Contractingmain tradeGoogle main category

Service area

Serves Mamaroneck and 11 towns within 25 miles: Harrison, Larchmont, Rye, Wykagyl, Eastchester, New Rochelle, Scarsdale, Tuckahoe, Port Chester, Greenville and Pelham.

Based in Mamaroneck, NYView on map

Opening hours

Opening hours for KOSL BUILDING GROUP
DayHours
Monday8 AM – 4 PM
Tuesday8 AM – 4 PM
Wednesday8 AM – 4 PM
Thursday8 AM – 4 PM
Friday8 AM – 4 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 × 1.10 Middle Atlantic factor (2025 Cost vs. Value Report)$16,000$29,600$45,640
Bathroom remodelPer bathroom: typical range of customer-reported remodels. US national range × 1.15 Middle Atlantic factor (2025 Cost vs. Value Report)$7,670$14,020$20,380

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

4.5from 16 Google reviews

Hired KOSL BUILDING GROUP? Write a review

Questions about KOSL BUILDING GROUP

What are KOSL BUILDING GROUP’s hours?

KOSL BUILDING GROUP is open Monday to Friday. Its listed hours are Monday to Friday, 8 AM – 4 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does KOSL BUILDING GROUP serve?

Serves Mamaroneck and 11 towns within 25 miles: Harrison, Larchmont, Rye, Wykagyl, Eastchester, New Rochelle, Scarsdale, Tuckahoe, Port Chester, Greenville and Pelham. 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 KOSL BUILDING GROUP?

KOSL BUILDING GROUP has a rating of 4.5 from 16 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 KOSL BUILDING GROUP?

Call KOSL BUILDING GROUP on (914) 777-0007. The business is at 875 Mamaroneck Ave, Mamaroneck, NY 10543. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

Own KOSL BUILDING GROUP? Claim this profile.

Claiming is free. Correct your hours, trades and service area. The CR Score is recalculated from corrected data; payment never changes it.

Claim this profile