| Primary address | 399 Knollwood Road, White Plains |
| Zip code | 10603 |
| County | Westchester |
| Municipality | Greenburgh |
| Parcel ID | 7.410-221-21 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 05/28/2015 |
| Sale price | $24,500,000 |
| Arm's length | Register |
| Current property tax | $442,647 |
| Building class | Office Building (464) |
| Acreage | 5.38 |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
This Office Building (464) located at 399 Knollwood Road, White Plains, NY 10603 has a total of 142,460 square feet and a current price per square foot of $171.
What is the year built & the current market value of 399 Knollwood Road, White Plains, NY 10603?399 Knollwood Road, White Plains, NY 10603 was built in 1986 and has a current tax assessor's market value of $20,811,200.
How many commercial spaces does this building have?This building has 69 commercial spaces available for lease. There are 12 active listings at this address.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
| Listing type | For Lease |
|---|---|
| Listing date | 01/23/2026 |
| Last updated | 03/31/2026 |
| Lot size | 5.38 Acre |
CONVENIENTLY LOCATED.
EXCEPTIONAL ON -SITE
AMENITIES.
• Class A Building
• 24/7 Access
• Public areas recently upgraded
• Direct access in every direction to I-287, I-87
& Sprain Brook Pkwy
• On-Site Café
• New Fitness Center
• Owner-Occupied
• Attentive Property Management
• Directly off Exit I-287 Exit 4
| Suite name | Space type | Lease rate | Available space | Brokers |
|---|---|---|---|---|
| #100 | Office | Listing price not available | 1,389 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #101 | Office | Listing price not available | 1,333 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #102 | Office | Listing price not available | 3,395 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #103A | Office | Listing price not available | 1,479 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #115 | Office | Listing price not available | 2,899 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| Space Available | Office | Listing price not available | 3,026 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| Space Available | Office | Listing price not available | 2,095 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #201 | Office | Listing price not available | 1,864 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #203 | Office | Listing price not available | 1,933 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #300 | Office | Listing price not available | 3,105 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #301 | Office | Listing price not available | 2,216 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
| #309 | Office | Listing price not available | 3,121 | Chris OâCallaghan (914) 278-6466 DILLON FOLEY (914) 968-8500 Robert Taylor |
Create a free account to view the complete sales history for 399 Knollwood Road, White Plains, including title documents, transfer conditions, mortgages and liens.
*Here are the three most recent sales for this property.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 399 Knollwood Road, White Plains, NY 10603. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025 |
| Base tax | $445,733 |
| Current property tax | $442,647 |
| Market value | $20,811,200 |
| Assessed value | $20,811,200 |
Here's the assessment & property tax history for 399 Knollwood Road, White Plains, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|---|
| 2025 | $20,811,200 | $20,811,200 | 21.418 | $445,733 | -4.83% |
| 2024 | $20,811,200 | $20,811,200 | 22.504 | $468,334 | -0.42% |
| 2023 | $20,733,800 | $20,733,800 | 22.6821 | $470,287 | -5.13% |
| 2022 | $20,733,800 | $20,733,800 | 23.9079 | $495,702 | -4.78% |
| 2021 | $20,733,800 | $20,733,800 | 25.1086 | $520,597 | -3.37% |
Access a detailed real estate market overview of White Plains so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in White Plains and compare it to other neighborhoods in Westchester County.
Check out recently sold homes in White-Plains and see how their prices compare.
| Total population | 18,910 |
| Median age | 39.2 |
| Average household income | $155,632 |
| Family households | 69.8% |
| Occupied housing units | 7,128 |
| Owner occupied units | 64.7% |
| Average number of people per household | 2.62 |
| Median year structure built | 1963 |
| Median value for units with a mortgage | $568,800 |
| Median value for units without a mortgage | $428,400 |
Create a free account to unlock extended information for 399 Knollwood Road, White Plains, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | X (See more on map) |
Access the detailed traffic volume map for 399 Knollwood Road, White Plains to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
| View daily traffic map |
Here are the neighbors for 399 Knollwood Road, White Plains.
