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Welcome to Monahan Lake

Monahan Lake is a small lake in Green Oak Township, Livingston County, inside the Whitmore Lake community, which takes in the area around Monahan Lake on its northeast side (Wikipedia). It's in the 48189 ZIP code (federal GNIS feature record) and about 24.1 miles from downtown Fenton. When I checked in October 2026, my site had no Monahan Lake homes for sale, so the button above shows all Green Oak Township waterfront homes, and I'm happy to set up a saved search just for Monahan Lake.

Lake Overview

• Location: Green Oak Township, Livingston County, in the Whitmore Lake area (Wikipedia).
• Size: about 19 acres in DNR data (Michigan's Named Inland Lakes, DNR data via MLSA); EGLE MiEnviro inland lakes mapping also shows about 19 acres, while the federal GNIS feature record lists 14 acres. Published depth figures don't agree, so I'd treat depth as unconfirmed.
• Boating: I didn't find a Michigan DNR local watercraft control naming Monahan Lake (Michigan DNR Livingston County watercraft controls).
• Public access: I didn't find a published public boat launch for Monahan Lake. Ask me, and we'll confirm what applies to a specific home.
• Shoreline: Microsoft building-footprint map data shows about 27 buildings near the shore.

Living on Monahan Lake

Monahan Lake is a tucked-away small lake in the Whitmore Lake community, which sits about 9 miles north of Ann Arbor and 9 miles south of Brighton, with US-23 running along its west side (Wikipedia).

Green Oak Township & Schools

Monahan Lake homes are in Green Oak Township with Whitmore Lake addresses. Green Oak Township waterfront homes on my site today are in Brighton Area Schools, South Lyon Community Schools or Whitmore Lake Public Schools, so I confirm the school district and utilities for every address.

Tips for Buyers

• Understand riparian rights. Michigan waterfront ("riparian") owners generally have rights to dock and reach the water (EGLE inland lakes guide). "Lake privileges" or a shared lot is different, so read the deed and any easement.
• Know the local rules. I'll check Green Oak Township zoning, association rules, and any dock or shoreline rules for the specific parcel.
• Seawalls and permanent docks generally need an EGLE permit, while seasonal docks usually don't (EGLE dock handout). Ask for permit records.
• Confirm sewer or septic and well, and schedule inspections for any private system.
• Check the address on FEMA's Flood Map Service Center and get a flood insurance quote early.
• I didn't find a published lake association or lake special assessment for Monahan Lake. The lake weed projects posted by Green Oak Township special projects are for Briggs Lake and Whitmore Lake. I'll confirm any dues or assessments on the parcel in writing.
• Taxable value generally "uncaps" after a sale (MCL 211.27a), so don't budget off the seller's tax bill.
• On a small lake, ask about frontage width, water depth at the dock and any shared access lots nearby.

Tips for Sellers

• Lead with the quiet water and the quick US-23 commute.
• Say "Monahan Lake, Green Oak Township, Whitmore Lake" so local buyers find you.
• Have survey, dock and well, septic or sewer details ready.

FAQ

Where is Monahan Lake?

In Green Oak Township, in the Whitmore Lake community (Wikipedia).

How big is Monahan Lake?

About 19 acres in DNR data (Michigan's Named Inland Lakes, DNR data via MLSA).

Is there a public launch on Monahan Lake?

I didn't find a published public boat launch.

Let's Talk Lake Life

Dreaming of a small, quiet lake with an easy commute? I'd love to help you watch for a home on Monahan Lake. Give me a call at (810) 962-4908.