Sine & Monaghan Realtors

$2.6M revenue • 12 employees • 18412 Mack Ave, Grosse Pointe, MI, 48236, United States

Last Updated Apr 27, 2026

Company Overview

Company Name

Sine & Monaghan Realtors

Address

18412 Mack Ave, Grosse Pointe, MI, 48236, United States

Approx. Annual Revenue

$2.6M

Employees

12

Established

2010

Google Reviews

4.9 (271 reviews)

Locations

4

About Sine & Monaghan Realtors

Sine & Monaghan Realtors is a real estate company based in Grosse Pointe, Michigan, with approximately 51 employees. Established in 2010, the company operates in the Grosse Pointe, St. Clair, and surrounding areas, providing digital resources for buying and selling homes. With four offices in the metro Detroit area, Sine & Monaghan Realtors aims to serve clients with real-time market data and property listings.

Business Profile

Read from the Sine & Monaghan Realtors website on Oct 13, 2026. Hover an item to see the exact wording it came from.

About the website

Website quality (AI-assessed)
6/10 · Copyright notice says 2023; Listing data current to 2026
Footer copyright year
2023

Recent changes

What changed on the Sine & Monaghan Realtors website and Google listing, as detected by Coldlytics on each visit.

  1. Google reviews went from 155 to 156

Coldlytics tracks changes like these across millions of businesses, so you can reach companies the moment they add a pixel, start hiring, or switch software.

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Sine & Monaghan Realtors locations

4 Google Business Profile listings.

LocationGoogle categoryReviewsStatus
18412 Mack Ave, Grosse Pointe, MIprimary— 4.9 (271)Claimed
201 N Riverside Ave, St Clair, MIReal estate agency 4.9 (156)Claimed
4181 Pointe Tremble Rd, Clay Township, MIReal estate agency 4.9 (40)Claimed
408 S Lafayette Ave, Royal Oak, MIReal estate agency 4.6 (25)Claimed

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Frequently Asked Questions about Sine & Monaghan Realtors

Categories

Technologies Used

Social Profiles

Key Decision Makers

Mark Monaghan Broker/Owner
LinkedIn