12 Danforth Rd is one of the Midwest's most stunning estates, with breathtaking views of The Great River Road and Mississippi River. Originally built in 1927, the home has had thoughtful updates made over time, with major renovations completed in 2013, including an underground tunnel connecting the main residence to the guest house and 11-car garage. The 7 bedrooms each offer private suite features. Located approximately 35 minutes from Lambert International, and 15 minutes from a private airstrip, the estate offers convenient transportation options. The charming towns of Alton and nearby Grafton provide marina access to major waterways. The residence, its systems and grounds have been meticulously cared for. Known as the "Olin Mansion," this exquisite property has approximately 15,000 sq.ft. of space in the main residence, and is situated on 32 acres of land in the Fairmont subdivision, a private development. We invite you to reach out to learn more about this remarkable estate.
Single-familyProperty Type
1927Year Built
32.21 acresLot Size
$197Est. Price/Sq.Ft.
11 car garageParking
Listed by Nicholas Schranck• Landmark Realty
Listed by Don Brown• Jameson Sotheby's Internationa
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Beds
7
Baths
9.5
Stories
2
Lot width
—
Lot depth
—
Lot size
10 Acres
Year renovated
1940
Sq. Ft.
13,830
Year built
1927
Style
Single Family Residential
County
Madison County
APN
242070303301003
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 21, 2026.
Property details
Parking
Parking Information
Covered Spaces: 11
Parking Features: Accessible Parking, Additional Parking, Carriage House, Carriage House w/Apt, Garage Door Opener, Oversized, Workshop in Garage
Garage Spaces: 11
Carport Spaces: 0
Has Garage
Interior
Virtual Tour
Bedroom Information
# of Bedrooms: 9
# of Bedrooms Main: 2
Bathroom Information
# of Full Baths (Total): 9
# of Half Baths (Total): 4
# of Main Level Bathrooms (Total): 3
# of Main and Upper Bathrooms: 11
Main Level # of Half Bathrooms: 2
Main Level # of Full Bathrooms: 1
Basement Information
Has Basement
Basement Features: Stone/Rock
Other Rooms Information
# of Rooms: 34
Fireplace Information
Has Fireplace
# of Fireplaces: 7
Fireplace Features: Gas
Heating & Cooling
Has Heating
Heating Information: Radiant Floor, Radiator(s)
Cooling Information: Electric
Interior Features
Interior Features: Bookcases, Cathedral Ceiling(s), Carpets, Special Millwork, Window Treatments, Vaulted Ceiling, Walk-in Closet(s), Some Wood Floors
Appliances: Grill, Central Vacuum, Dishwasher, Disposal, Double Oven, Microwave, Range, Range Hood, Refrigerator, Stainless Steel Appliance(s)
Exterior
Building Information
Construction Materials: Brick
Pool Information
Has Private Pool
Property Information
Ownership Type: Private
Property Type: Residential
Property Sub Type: Residential
Other Structures: Garage(s), Guest House, Outdoor Kitchen, Pergola, RV/Boat Storage, Second Garage, Tennis Court(s), Workshop
Above Grade Finished Area: 15,972
Above Grade Finished Area Source: Other
Below Grade Finished Area: 5,263
Below Grade Finished Area Source: Other
Lot Information
Lot Features: Backs to Trees/Woods, Creek, Park View, River, Sidewalks, Streetlights, Water View, Wooded
Lot Size Acres: 32.21
Lot Size Dimensions: +/- 32.2 acres
Lot Size Source: County Records
Financial
Tax Information
Tax Annual Amount: $65,406
Tax Year: 2021
Utilities
Utility Information
Water Source: Public
Sewer: Septic Tank
Location
HOA Information
Association Amenities: Elevator in Residence, Spa/Hot Tub, Private Inground Pool, Security Lighting, Tennis Court(s), Underground Utilities, Workshop Area
School Information
Elementary School: ALTON DIST 11
Middle Or Junior High School: ALTON DIST 11
High School: Alton
High School District: Alton DIST 11
Public facts
Beds: 7
Baths: 9.5
Sq. Ft.: 13,830
Stories: 2.0
Lot Size: 10 acres
Style: Single Family Residential
Year Built: 1927
Year Renovated: 1940
County: Madison County
APN: 242070303301003
Home facts updated by county records on Jul 21, 2026
Other
Home Information
Living Area: 20235
Levels: Three Or More
Around this home
Schools
West Elementary School
Public 2-5 • Assigned • 1.1mi
3/10
Alton Middle School
Public 6-8 • Assigned • 3.3mi
4/10
Alton High School
Public 9-12 • Assigned • 3.5mi
3/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
2/10 Fire Factor
0.00% chance of being in a wildfire in next 30 years
4/10 Heat Factor
7 days above 107° expected this year, 19 days in 30 years
2/10 Wind Factor
1% chance of strong winds in next 30 years
3/10 Air Factor
2 unhealthy days expected this year, 4 days in 30 years
Provided by First Street
Historical weather
Alton, IL • 62002
Average low and high temperatures (°F)
36
19
45
27
64
41
70
50
74
56
85
67
89
73
86
67
83
62
73
52
56
41
44
29
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 9.8 hours in
June and 4.1 hours in December, which is comparable to the
U.S. average for solar exposure.
9.8 hrs
4.1 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$3.79M – $4.59M
Reach more buyers when you sell with Redfin. Save up to $39,861 in fees.3 minutes to get started.
Get a free, detailed breakdown of how we calculated your estimate.