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Walker Medical Building 12855 N 40 Dr 463 - 21,004 SF of Office/Medical Space Available in Saint Louis, MO 63141
Highlights
- 12855 N Forty Drive, the Walker Medical Building, is a Class A MOB with a multi-specialty tenant mix in West St. Louis.
- Affluent, health-conscious locale with an average annual household income of over $162,000 reported within a 3-mile radius.
- Minutes to three of the area’s major hospitals with direct access to Highway 40/Interstate 64, leading to Interstate 270 and MO-141.
- ADA-accessible property featuring a two-level parking garage, 24-hour card access, and a backup generator.
- Equipped for lab testing, dental practices, advanced imaging, physical therapy, surgery, concierge medicine, primary care, and much more.
All Available Spaces(6)
Display Rental Rate as
- Space
- Size
- Term
- Rental Rate
- Space Use
- Build-Out
- Available
- Rate includes utilities, building services and property expenses
- Mostly Open Floor Plan Layout
- Fully Built-Out as Standard Office
- Fits 3 - 10 People
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Mostly Open Floor Plan Layout
- Fully Built-Out as Standard Office
- Fits 18 - 57 People
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Laboratory
- Central Air Conditioning
- Fully Built-Out as Standard Office
- Fits 2 - 4 People
- Reception Area
- Wheelchair Accessible
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Laboratory
- Central Air Conditioning
- Fully Built-Out as Standard Office
- Fits 7 - 48 People
- Reception Area
- Wheelchair Accessible
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Can be combined with additional space(s) for up to 6,338 SF of adjacent space
- Reception Area
- Wheelchair Accessible
- Fully Built-Out as Standard Office
- Fits 8 - 25 People
- Laboratory
- Central Air Conditioning
- Rate includes utilities, building services and property expenses
- Mostly Open Floor Plan Layout
- Can be combined with additional space(s) for up to 6,338 SF of adjacent space
- Fully Built-Out as Standard Office
- Fits 5 - 25 People
| Space | Size | Term | Rental Rate | Space Use | Build-Out | Available |
| Lower Level, Ste LL3 | 1,143 SF | Negotiable | $44.08 CAD/SF/YR $3.67 CAD/SF/MO $50,383 CAD/YR $4,199 CAD/MO | Office/Medical | Full Build-Out | Now |
| 1st Floor, Ste 150 | 7,074 SF | Negotiable | $49.59 CAD/SF/YR $4.13 CAD/SF/MO $350,800 CAD/YR $29,233 CAD/MO | Office/Medical | Full Build-Out | 2026-06-01 |
| 1st Floor, Ste 180A | 463 SF | Negotiable | $44.08 CAD/SF/YR $3.67 CAD/SF/MO $20,409 CAD/YR $1,701 CAD/MO | Office/Medical | Full Build-Out | Now |
| 2nd Floor, Ste 200 | 2,500-5,986 SF | Negotiable | $44.08 CAD/SF/YR $3.67 CAD/SF/MO $263,863 CAD/YR $21,989 CAD/MO | Office/Medical | Full Build-Out | 30 Days |
| 2nd Floor, Ste 260 | 3,088 SF | Negotiable | $44.08 CAD/SF/YR $3.67 CAD/SF/MO $136,119 CAD/YR $11,343 CAD/MO | Office/Medical | Full Build-Out | Now |
| 2nd Floor, Ste 275 | 3,250 SF | Negotiable | $44.08 CAD/SF/YR $3.67 CAD/SF/MO $143,260 CAD/YR $11,938 CAD/MO | Office/Medical | Full Build-Out | Now |
Lower Level, Ste LL3
| Size |
| 1,143 SF |
| Term |
| Negotiable |
| Rental Rate |
| $44.08 CAD/SF/YR $3.67 CAD/SF/MO $50,383 CAD/YR $4,199 CAD/MO |
| Space Use |
| Office/Medical |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
1st Floor, Ste 150
| Size |
| 7,074 SF |
| Term |
| Negotiable |
| Rental Rate |
| $49.59 CAD/SF/YR $4.13 CAD/SF/MO $350,800 CAD/YR $29,233 CAD/MO |
| Space Use |
| Office/Medical |
| Build-Out |
| Full Build-Out |
| Available |
| 2026-06-01 |
1st Floor, Ste 180A
| Size |
| 463 SF |
| Term |
| Negotiable |
| Rental Rate |
| $44.08 CAD/SF/YR $3.67 CAD/SF/MO $20,409 CAD/YR $1,701 CAD/MO |
| Space Use |
| Office/Medical |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
2nd Floor, Ste 200
| Size |
| 2,500-5,986 SF |
| Term |
| Negotiable |
| Rental Rate |
| $44.08 CAD/SF/YR $3.67 CAD/SF/MO $263,863 CAD/YR $21,989 CAD/MO |
| Space Use |
| Office/Medical |
| Build-Out |
| Full Build-Out |
| Available |
| 30 Days |
2nd Floor, Ste 260
| Size |
| 3,088 SF |
| Term |
| Negotiable |
| Rental Rate |
| $44.08 CAD/SF/YR $3.67 CAD/SF/MO $136,119 CAD/YR $11,343 CAD/MO |
| Space Use |
| Office/Medical |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
2nd Floor, Ste 275
| Size |
| 3,250 SF |
| Term |
| Negotiable |
| Rental Rate |
| $44.08 CAD/SF/YR $3.67 CAD/SF/MO $143,260 CAD/YR $11,938 CAD/MO |
| Space Use |
| Office/Medical |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
1 of 11
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Lower Level, Ste LL3
| Size | 1,143 SF |
| Term | Negotiable |
| Rental Rate | $44.08 CAD/SF/YR |
| Space Use | Office/Medical |
| Build-Out | Full Build-Out |
| Available | Now |
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Fits 3 - 10 People
1 of 2
Videos
Matterport 3D Exterior
Matterport 3D Tour
Photos
Street View
Street
Map
1st Floor, Ste 150
| Size | 7,074 SF |
| Term | Negotiable |
| Rental Rate | $49.59 CAD/SF/YR |
| Space Use | Office/Medical |
| Build-Out | Full Build-Out |
| Available | 2026-06-01 |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Fits 18 - 57 People
1 of 12
Videos
Matterport 3D Exterior
Matterport 3D Tour
Photos
Street View
Street
Map
1st Floor, Ste 180A
| Size | 463 SF |
| Term | Negotiable |
| Rental Rate | $44.08 CAD/SF/YR |
| Space Use | Office/Medical |
| Build-Out | Full Build-Out |
| Available | Now |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Office intensive layout
- Fits 2 - 4 People
- Laboratory
- Reception Area
- Central Air Conditioning
- Wheelchair Accessible
1 of 12
Videos
Matterport 3D Exterior
Matterport 3D Tour
Photos
Street View
Street
Map
2nd Floor, Ste 200
| Size | 2,500-5,986 SF |
| Term | Negotiable |
| Rental Rate | $44.08 CAD/SF/YR |
| Space Use | Office/Medical |
| Build-Out | Full Build-Out |
| Available | 30 Days |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Office intensive layout
- Fits 7 - 48 People
- Laboratory
- Reception Area
- Central Air Conditioning
- Wheelchair Accessible
1 of 12
Videos
Matterport 3D Exterior
Matterport 3D Tour
Photos
Street View
Street
Map
2nd Floor, Ste 260
| Size | 3,088 SF |
| Term | Negotiable |
| Rental Rate | $44.08 CAD/SF/YR |
| Space Use | Office/Medical |
| Build-Out | Full Build-Out |
| Available | Now |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Office intensive layout
- Fits 8 - 25 People
- Can be combined with additional space(s) for up to 6,338 SF of adjacent space
- Laboratory
- Reception Area
- Central Air Conditioning
- Wheelchair Accessible
2nd Floor, Ste 275
| Size | 3,250 SF |
| Term | Negotiable |
| Rental Rate | $44.08 CAD/SF/YR |
| Space Use | Office/Medical |
| Build-Out | Full Build-Out |
| Available | Now |
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Fits 5 - 25 People
- Can be combined with additional space(s) for up to 6,338 SF of adjacent space
Property Overview
Join the ranks of leading healthcare specialists and take advantage of superior visibility and connectivity with one of the high-end suites offered at 12855 N Forty Drive, the Walker Medical Building. 12855 N Forty Drive spans approximately 150,000 square feet across four stories and features a two-story parking garage, 24-hour access, ADA accessibility, and a backup generator for seamless operations and access. New tenants will be in good company with co-occupants in pediatrics, gastroenterology, neurosurgery, cardiology, family medicine, podiatry, general surgery, psychiatry, and more, a diverse mix to broaden referral networks. Walker Medical Building benefits from proximity to three major hospitals, Mercy (formerly St. John’s), Missouri Baptist, and St. Luke's, all of which are less than 10 minutes from the property. Local residents report a high payor mix and prioritize health and wellness with some of the most prestigious communities nearby, such as Town and Country, Chesterfield, Clarkson Valley, Ladue, and Des Peres. Connections to these patient pools are streamlined via direct access to Interstate 64 and other close arterial roadways. Many residents are organically drawn here, making this a convenient destination, with several local schools, colleges, country clubs, parks, and shopping districts moments away.
- 24 Hour Access
- Bio-Tech/ Lab Space
- Wheelchair Accessible
- Backup Power / Generators
Property Facts
Building Type
Office
Year Built/Renovated
1983/2006
Building Height
4 Stories
Building Size
151,844 SF
Building Class
A
Typical Floor Size
37,961 SF
Unfinished Ceiling Height
8’
Parking
434 Surface Parking Spaces
437 Covered Parking Spaces
Select Tenants
- Floor
- Tenant Name
- Industry
- LL
- Arch Cancer Care
- Health Care and Social Assistance
- 1st
- Gateway Endoscopy Center
- Health Care and Social Assistance
- 2nd
- Mercy Clinic Internal Medicine - Creve Coeur
- Health Care and Social Assistance
- 1st
- Neurosurgery of St. Louis
- Health Care and Social Assistance
- 3rd
- Urology of St. Louis
- Health Care and Social Assistance
Fairly walkable
40/100
Exceptionally drivable
100/100
Somewhat bikeable
30/100
1 of 14
Videos
Matterport 3D Exterior
Matterport 3D Tour
Photos
Street View
Street
Map
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Walker Medical Building | 12855 N 40 Dr
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