1000 Spring St, Silver Spring, MD 20910 Property Records

Montgomery County property record for 1000 Spring St, Silver Spring, MD 20910 · Last verified August 2026

Property Highlights

Property Type	Commercial > Office > Commercial Office
Year Built	Built 2018
Square Footage	121,724 sqft Gross Area
Lot Size	1.94 acres
Last Sale	$10,244,655 (2019)
Tax Bill	$478,433.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`13-03770275`
Alternative APN	`03770275`

Interior

Building Area	121,724 sqft Gross Area
1st Floor	121,724 sqft 1st Floor
Stories	6 Stories
Elevator	Elevator

Exterior

Year Built	Built 2018
Effective Year Built	Effective 2018
Exterior Material	Brick Exterior
Construction Type	Brick Construction
Fire Resistance Class	Buildings having fireproofed structural steel frames carrying all wall, floor and roof loads. Wall, floor and roof structures are built of non-combustible materials.
Lot Area	84,776 sqft

Utilities and HVAC

Cooling System	A/C Chilled Water Cooling
Heating System	Hot Water Heating

Location & Zoning

Account Number	03770275
Street Address	1000 SPRING ST
City	SILVER SPRING
State	MD
Zip	20910-4004
Property Usage	Commercial Property Usage
Type	Commercial > Office > Commercial Office
Legal Description	UNITED THERAPEUTICS
Legal Subdivision	CLOUIN COURSE & DUBLIN FARM
Legal Block	3
Legal Lot Number	3
Jurisdiction	MONTGOMERY MD
Minor Civil Division	13
Census Blockgroup	3
Census Block	3003
Census Tract	702503

Owner

Source: Montgomery County records · APN 13-03770275

Assessment roll updated August 17, 2026 · Last verified August 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Individual Owner on File
Mailing Address	1040 SPRING ST, SILVER SPRING, MD 20910-4004
Owner Type	Owner is a Company
Vesting	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Known Transactions	Last Sale Amount on Apr 15, 2019 Deed Sale Price on Apr 15, 2019
Deed Book / Page	57439 / 434
Record Refreshed	Sep 20, 2026

April 2019: Correction Deed, Transfer

Document Type	Correction Deed
Jurisdiction	MONTGOMERY MD
Recording Date	Apr 15, 2019
Property Address	1000 SPRING ST, SILVER SPRING, MD 20910-4004
Document Number	0574390434
Book / Page	057439 / 000434
Instrument Date	Apr 03, 2019
Transaction Type	Transfer
Record Updated	Jan 10, 2020
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NAT'L TITLE INS CO

Transaction

Amount	Amount Recorded
Tax	$10,244.66
Amount Accuracy	Confirmed
Additional	Arms Length Transaction Multiple parcels conveyed, unknown impact to APN

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	1735 CONNECTICUT AVE NW #2ND WASHINGTON DC 200091187, 2ND, WASHINGTON, DC 20009-1187

Tax Assessment & Valuation

Source: Montgomery County records · Assessment roll updated August 17, 2026 · Last verified August 2026

Property Jurisdictions

Type	Name
State	Maryland
County	Montgomery County
Unified School District	Montgomery County Public Schools (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$39,255,733 (+0.64%)	$39,505,900 (-) Land $14,331,300 Building $25,174,600
2025	$478,433.00 (+7.72%)	$39,005,567 (+1.1%)	$39,505,900 (+1.94%) Land $14,331,300 Building $25,174,600
2023		$38,581,767	$38,755,400 Land $10,204,600 Building $28,550,800
2022	$444,149.00