Montgomery County property record for 4136 Mount Olney Ln, Olney, MD 20832
| Property Type | Single Family Home |
|---|---|
| Details | 2.5 ba · 2,277 sqft · built 1971 |
| Lot Size | 0.492 acres (21,450 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $600,000 (Jan 2024) |
| Tax Bill | $6,409 (2025) |
| Deeds & Mortgages | Jan 2024 Sale & Mortgage Sep 2023 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 08-00744816 |
| Primary APN | 08-00744816 |
|---|---|
| Alternative APN |
|
| Full Baths | 2.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 2,277 sqft Living Area |
| 1st Floor Area | 1,502 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1971 |
|---|---|
| Effective Year Built | Effective 1971 |
| Architectural Style | Bi-Level |
| Exterior Material | Brick |
| Construction Type | Frame |
| Roof Material | Composition Shingle |
| Lot Area | 21,450 sqft (0.492 acres) |
| Garage Type | Carport |
| Garage Area | 312 sqft |
| Carport | Carport |
| Carport Area | 312 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | HVAC |
| Sewer | Municipal |
| Account Number | 00744816 |
|---|---|
| Street Address | 4136 MOUNT OLNEY LN |
| City | OLNEY |
| State | MD |
| Zip | 20832-1004 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RE1 |
| Legal Description | OLNEY MILL |
| Legal Subdivision | OLNEY MILL |
| Legal Block | 51 |
| Legal Lot Number | 12 |
| Jurisdiction | MONTGOMERY MD |
| Township / Civil Division | 8 |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 701304 |
Source: Montgomery County records, as of August 17, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 4136 MOUNT OLNEY LN, OLNEY, MD 20832-1004 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants by the Entirety |
| Date | Document |
|---|---|
| Jan 17, 2024 | Deed, Transfer · Conventional Mortgage LAFAYETTE FCU |
| Sep 19, 2023 | Deed of Trust, Mortgage EDUARDO A DUBOIS |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jan 17, 2024 · Amount on Record |
| Deed Sale | Jan 17, 2024 · Amount on Record |
| Deed Book / Page | 67692 / 476 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | MONTGOMERY MD |
| Recording Date | Jan 17, 2024 |
| Property Address | 4136 MOUNT OLNEY LN, OLNEY, MD 20832-1004 |
| Document Number | 0676920476 |
| Book / Page | 67692 / 476 |
| Map Reference | MB 86 PL 9155 |
| Instrument Date | Dec 21, 2023 |
| Transaction Type | Transfer |
| Record Updated | Jan 30, 2024 |
| Title Company | BAYVILLE TITLE AND ESCROW LLC, BAYLINE TITLE & ESCROW LLC |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $3,000.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants by the Entirety |
| Address | 4136 MOUNT OLNEY LN, OLNEY, MD 20832-1004 |
| Document Number | 0067692483 |
|---|---|
| Date | Jan 17, 2024 |
| Instrument | 67692/483 |
| Name | LAFAYETTE FCU |
|---|---|
| Type | Credit Union |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Jan 1, 2054 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 7% |
| Type Change Date | Jan 1, 2029 |
| Change Frequency | 6 Months |
| Min Rate At Change | 5% |
| Max Rate At Change | 9% |
| Max Rate | 13% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MONTGOMERY MD |
| Property Address | 4136 MOUNT OLNEY LN, OLNEY, MD 20832-1004 |
| Transaction Type | Mortgage |
| Record Updated | Oct 3, 2023 |
| Name | Verified Name |
|---|
| Document Number | 0673810076 |
|---|---|
| Date | Sep 19, 2023 |
| Book Page | 67381/76 |
| Name | EDUARDO A DUBOIS |
|---|---|
| Type | Private Party |
| Address | 7211 HAWKINS CREAMERY RD, GAITHERSBURG, MD 20882 |
| Amount | Amount Recorded |
|---|---|
| Term | 12 Months |
| Due | Sep 19, 2024 |
Source: Montgomery County assessment roll, as of August 17, 2026
| Type | Name |
|---|---|
| State | Maryland |
| County | Montgomery County |
| Unified School District | Montgomery County Public Schools (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $574,967 (+3.1%) | $609,500 (+9.29%) Land $274,500 Building $335,000 | |
| 2025 | $6,409.00 (+57.86%) | $557,700 (+14.54%) Land $261,400 Building $296,300 | $557,700 (-) Land $261,400 Building $296,300 |
| 2023 | $486,900 | $557,700 Land $261,400 Building $296,300 | |
| 2022 | $4,060.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective April 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · above 41% of Maryland |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | WASHINGTON SUBURBAN SANITARY COMMISSION serves 1,900,000 people · EPA ID MD0150005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | May 2025 |
| Lead | Under 1 ppb (2018–2020) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 20 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 1,200 / 35 |
| Verizon Fiber · Fixed Wireless in parts of the area | 980 / 880 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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