3640 Double Rock Ln · Overlea, MD 21234

$298,000

3 bd · 2.5 ba · 1,750 sqft · Townhouse public records · 6 Days on market

Built 1977 1,780 sqft lot $170/sqft · 16% below area Est $353k · 16% under $135/mo HOA · 6% of rent

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Why this score? — see what drove the D- grade

The composite is a weighted blend of 9 inputs, each scored 0–100. Each bar is that input's sub-score; the figure is the points it added to the 100-point composite (weight × sub-score).

• ARV discount +14.5/15.0
• Cash flow +7.8/30.0
• Rent growth +4.2/5.0
• Livability +4.0/5.0
• 1% rule +2.7/10.0
• Condition / age +2.5/5.0
• Schools +2.3/10.0
• DSCR +1.9/10.0
• Appreciation +0.0/10.0

Listing remarks MLS

Lovely and spacious town house in convenient Parkville! Three finished levels, new carpet, renovated kitchen with open plan and island! Door to deck, backs to trees! Three bedrooms including master with full bath and renovated hall bathroom! Nice raised back yard for usable space. Great neighborhood! Two assigned parking spots.

Key facts

• 1,780 sq ft lot
• 2 parking spots
• Built 1977

Property features AI

Finance

• HOA & community: HOA fee $135 monthly

Exterior

• Parking: Two assigned off-street parking spaces
• Utilities: Public water; Public sewer; Natural gas for heating; Electric cooling; Hot water: other
• Home design: Detached structure
• Construction: Brick construction; Block foundation; Above- and below-grade finished areas; 700 sq ft total below-grade area
• Exterior features: Detached single-family property; Above- and below-grade structure elements; No tidal water on the lot

Interior

• Kitchen: Built-in microwave; Dishwasher; Kitchen island; Eat-in kitchen
• Bedrooms: Three bedrooms on the upper level
• Bathrooms: Two full bathrooms; One half bathroom
• Heating & cooling: Forced air heating (natural gas); Electric cooling (other type)
• Interior features: Tub/shower; Ceiling fans; Combination kitchen and dining area; Eat-in kitchen; Kitchen island; Recessed lighting; Fully finished walkout basement with connecting stairway
• Laundry & utility: Washer; Dryer

What this means for you Summary

Snapshot

• This is a 3-bed/2.5-bath townhouse listed at $298k.

Deal economics

• At list price, monthly cash flow is $-335 ($-4k/yr) — negative.
• To cash-flow at today's rent, offer at most $239k (19.8% below list).
• To meet the 1% rule (rent ≥ 1% of price), the offer needs to be $230k (22.7% below list).
• Recommended offer: $230k (22.7% below list) — sets the bar for 1% rule.

Location & tenants

• Location reads 81/100 on livability (#38 in MD, #1,418 nationally) — a professional / high-income tenant draw. Strengths: amenities A+, commute A+, housing A+; Watch: crime F.
• Baltimore County Public Schools (suburban): math 15% / reading 34% proficiency, ranked #11 of 24 in MD (top 46%) — low school quality limits family demand, transient renter base, plan for 1-2y turnover.
• Market conditions: Rents rising fast (+6.7%/yr); 225 active listings in the ZIP; 21 comparable units currently listed for rent nearby; rentals at typical pace (median 25d on market — plan ~3-4 weeks tenant-placement turnaround); 48% of comp listings sitting > 30 days — soft ceiling on asking rent; solid renter incomes; 1,511 units permitted in Baltimore County in 2024 (643 in 5+ unit buildings).
• This rent runs 33% of the median local income ($84k/yr) — at the standard rent-burdened threshold; future hikes will face affordability resistance.

Forward outlook

• Local home prices are declining (-3.0%/yr); year-one equity from $2k of loan paydown is wiped out by about $9k of value loss. Plan a longer hold.
• Baltimore County population projected at +12% by 2050 — modest demand growth; plan on rents tracking national, not racing it.

Negotiation context

• Only 6 days on market — expect competitive offers; lowballing is unlikely to land.
• 5 sale attempts since 31y ago with the ask held roughly flat each time — persistent listings suggest the price (not the market) is what's stuck; bring a comps-based counter.
• Current owner paid $220k; 35% above their basis — modest negotiation headroom, anchor on the comps not their cost.

Risks & watch-outs

• Climate carrying-cost: major wind risk, 27% chance of damaging wind over 30y; extreme-heat days projected 7→15/yr by 2055 (HVAC capex compounding) — expect insurance premiums to compound above CPI over the hold.

Recommended offer $230,376 (22.7% below list)

Questions for the listing agent

1. What do current leases actually rent for vs. the listed asking? Can we see a recent rent roll and the last 12 months of T-12 income?
2. Built in 1977 — when were the roof, HVAC, electrical panel, plumbing, and water heater last replaced?
3. What does the HOA fee cover, when was the last increase, and are there any pending special assessments or reserve-fund shortfalls?
4. Is there a deadline driving the sale (1031 exchange, divorce, estate, relocation)? That informs how much negotiation room exists.
5. Crime grade is F in this area — have there been break-ins, vandalism, or insurance claims at this property in the last 3 years? What carrier currently insures it and at what premium?
6. The area grade is low — what's the realistic commute time and amenity access for the typical tenant pool here? Any planned neighborhood developments (good or bad) we should know about?
7. What's the average days-on-market for RENTAL listings here right now (not sales)? A rising rental-DOM trend means longer vacancies and softer asking-rent achievability than the comps imply.
8. What's the recent tenant-quality profile in this submarket — average credit score on applications, eviction rate, late-payment / NSF rate, and stable-employment percentage? A property-management company in the area should have these aggregated.
9. How much new for-sale + rental construction is in the pipeline within 1–3 miles? Heavy new supply typically softens prices + rents 12–24 months out; constrained supply supports both.

Investment metrics

• 1% rule: 0.77% ✗
• Cap rate: 4.95%
• Cash-on-cash: -4.81%
• DSCR: 0.79
• GRM: 10.8

CMA / ARV

• ARV (median comp): $352,819
• List price: $298,000
• Delta: -15.54%
• Verdict: UNDERPRICED
• Comps: 20 within 1.0 mi

Show comp detail 12 sales within ~0.75 mi

Address	Dist	Beds/Ba	Sqft	Sold	Price	$/sf	Match
3743 Double Rock Ln	0.14mi	3/2.5	1,750 (0%)	6mo	$279,000	$159	88
3741 Double Rock Ln	0.14mi	3/2.5	1,750 (0%)	13mo	$265,000	$151	83
3646 Double Rock Ln	0.02mi	3/2.5	1,820 (+4%)	12mo	$335,000	$184	83
3630 Double Rock Ln	0.02mi	3/2.5	1,900 (+9%)	18mo	$280,000	$147	69
3802 Rolling Way	0.26mi	3/2.0	1,652 (-6%)	9mo	$260,000	$157	69
3662 Double Rock Ln	0.05mi	3/2.5	1,925 (+10%)	17mo	$305,000	$158	67
3661 Rockberry Rd	0.08mi	3/2.5	1,925 (+10%)	15mo	$242,000	$126	67
3810 Glenview Ter	0.35mi	3/2.5	1,606 (-8%)	9mo	$265,000	$165	62
8413 Hallmark Cir	0.26mi	3/1.5	1,504 (-14%)	8mo	$278,000	$185	54
9 Bridgeview Ct	0.33mi	3/1.5	1,518 (-13%)	8mo	$260,000	$171	52
15 Jack Pine Pl	0.45mi	3/2.5	1,942 (+11%)	16mo	$308,000	$159	48
3309 Hiss Ave	0.53mi	3/1.5	1,550 (-11%)	20mo	$278,000	$179	36

Match score weights: distance 35% · size 25% · config 20% · recency 20%. Top-matched comps best support the ARV.

Projected returns pro-forma

-3.0% appreciation · 6.68% rent growth · sell at horizon

5-year hold

• IRR: -20.2%
• Equity multiple: 0.27×
• Total profit: $-60,668
• Equity at exit: $44,433

10-year hold

• IRR: -6.5%
• Equity multiple: 0.51×
• Total profit: $-40,744
• Equity at exit: $25,766

Cash invested: $83,440 (down + closing). Projections, not guarantees.

Landlord ↔ Tenant lean methodology

• Overall (STATE): 27 Tenant-Leaning
• State Maryland: 27 Tenant-Leaning · D+14
• County: — inherits STATE
• City: — inherits STATE

Failure-to-pay is dismissed if cured before judgment; Baltimore has just-cause; strict deposit rules.

Methodology + full state rankings →

ZIP-level market 21234

• Rents YoY: 6.7%
• Active inventory: 225
• Price-to-rent: 10.8×

Monthly cashflow live

• Estimated rent: $2,304 high
• Mortgage (P&I): −$1,563
• Tax from tax record: −$333 /mo · $3,993/yr
• Insurance: −$124
• HOA: −$135
• Vacancy / Maint / Mgmt: −$484
• Net cashflow: $-335

Break-even live

Break-even rent $2,727

Max offer price $238,874

Occupancy floor —

Sensitivity live

Price	-10% $-166	-5% $-250	+0% $-335	+5% $-419	+10% $-503
Rent	-10% $-517	-5% $-426	+0% $-335	+5% $-244	+10% $-153
Rate	-1.0pp $-185	-0.5pp $-259	base $-335	+0.5pp $-412	+1.0pp $-490

UW: 25.0% down · 7.5% · 30yr · 1.5% tax · 5.0% vac · 8.0% maint · 8.0% mgmt

Financing live

Cash to close

• Down payment: $74,500
• Closing costs: $8,940
• Reserves months: —
• Total cash needed: —

Rent comps 21 comps

Address	Beds	Baths	Sqft	Rent	$/sqft	DOM	Units	Dist
3617 Double Rock Ln Parkville, MD	3.0	2.5	2000	$2,395	$1.20	5d	1	0.10mi
7935 Belridge Rd Nottingham, MD	1.0–3.0	1.0–1.5	974	$2,172	$2.23	3d	17	0.36mi
3407 Orbitan Rd Parkville, MD	3.0	1.5	1508	$2,200	$1.46	24d	1	0.71mi
5 Belhaven Dr Nottingham, MD	4.0	1.5	1554	$2,000	$1.29	44d	1	0.75mi
21 Monhegan Ct Unit 28B Nottingham, MD	3.0	2.0	1436	$1,900	$1.32	44d	1	1.00mi
2 Durness Ct Unit 30I Nottingham, MD	3.0	2.0	1446	$2,100	$1.45	44d	1	1.03mi
100 Elinor Ave Nottingham, MD	4.0	2.5	1800	$2,800	$1.56	24d	1	1.06mi
101 Elinor Ave Nottingham, MD	4.0	2.0	1476	$2,900	$1.96	44d	1	1.08mi
3026 Lavender Ave Parkville, MD	2.0	2.0	2000	$1,850	$0.93	24d	1	1.11mi
29 E Elm Ave Baltimore, MD	3.0	2.0	2052	$3,000	$1.46	5d	1	1.14mi
3017 Lavender Ave Parkville, MD	3.0	3.0	2325	$2,699	$1.16	11d	1	1.16mi
8334 Tapu Ct Nottingham, MD	3.0	2.5	1302	$2,100	$1.61	15d	1	1.18mi
9428 Orbitan Ct Parkville, MD	2.0	1.5	1670	$2,250	$1.35	44d	1	1.18mi
9300 Carney Ave Unit A Parkville, MD	2.0	1.0	1392	$1,300	$0.93	44d	1	1.20mi
24 Lerner Ct Unit 32H Nottingham, MD	3.0	2.0	1556	$2,295	$1.47	18d	1	1.27mi
8529 Ramort Dr Unit 22A Nottingham, MD	3.0	2.0	1896	$2,495	$1.32	18d	1	1.28mi
5110 Kenwood Ave Baltimore, MD	3.0	1.5	1406	$2,500	$1.78	44d	1	1.31mi
8552 Hydra Ln Unit 11G Nottingham, MD	4.0	2.0	1296	$2,872	$2.22	18d	1	1.34mi
9 Robinway Ct Unit 25E Nottingham, MD	3.0	2.0	1500	$2,750	$1.83	44d	1	1.35mi
3201 E Joppa Rd Parkville, MD	3.0	1.5	1812	$2,800	$1.55	44d	1	1.40mi
2908 5th Ave Parkville, MD	3.0	1.0	1260	$1,950	$1.55	44d	1	1.43mi

HOA detail

• Monthly dues: $135 · $1,620/yr
• Likely covers: parking

Listing history 17 events

1. 2026-06-13
   status $298,000 Pending 6 DOM
2. 2026-05-14
   historical $298,000 2107-char remark
3. 2023-11-08
   historical $2,250
4. 2023-10-17
   listed $2,250
5. 2019-05-17
   soldstatus $220,000
6. 2019-05-03
   soldstatus $220,000 Closed 329-char remark

   Show marketing remark (329 chars)

   Lovely and spacious town house in convenient Parkville! Three finished levels, new carpet, renovated kitchen with open plan and island! Door to deck, backs to trees! Three bedrooms including master with full bath and renovated hall bathroom! Nice raised back yard for usable space. Great neighborhood! Two assigned parking spots.

7. 2019-04-13
   historical Active Under Contract 329-char remark

   Show marketing remark (329 chars)

   Lovely and spacious town house in convenient Parkville! Three finished levels, new carpet, renovated kitchen with open plan and island! Door to deck, backs to trees! Three bedrooms including master with full bath and renovated hall bathroom! Nice raised back yard for usable space. Great neighborhood! Two assigned parking spots.

8. 2019-04-11
   listed $220,000 Active 329-char remark

   Show marketing remark (329 chars)

   Lovely and spacious town house in convenient Parkville! Three finished levels, new carpet, renovated kitchen with open plan and island! Door to deck, backs to trees! Three bedrooms including master with full bath and renovated hall bathroom! Nice raised back yard for usable space. Great neighborhood! Two assigned parking spots.

9. 2004-04-23
   soldstatus $126,500
10. 2004-03-31
    soldstatus $126,500

    Show marketing remark (264 chars)

    VERY COMFORTABLE TOWNHOUSE IN POPULAR DOUBLE ROCK!! LARGE EAT IN KITCHEN W/ SLIDERS TO DECK * * FINISHED LOWER LEVEL W/ WALKOUT TO PATIO * * MASTER BEDROOM HAS FULL BATH & CEILING FAN * * ATTIC PULL DOWN FOR MORE STORAGE * * EXCLUDE BASEMENT REFRIGERATOR

11. 2004-02-13
    historical

    Show marketing remark (264 chars)

    VERY COMFORTABLE TOWNHOUSE IN POPULAR DOUBLE ROCK!! LARGE EAT IN KITCHEN W/ SLIDERS TO DECK * * FINISHED LOWER LEVEL W/ WALKOUT TO PATIO * * MASTER BEDROOM HAS FULL BATH & CEILING FAN * * ATTIC PULL DOWN FOR MORE STORAGE * * EXCLUDE BASEMENT REFRIGERATOR

12. 2004-02-06
    listed $125,900

    Show marketing remark (264 chars)

    VERY COMFORTABLE TOWNHOUSE IN POPULAR DOUBLE ROCK!! LARGE EAT IN KITCHEN W/ SLIDERS TO DECK * * FINISHED LOWER LEVEL W/ WALKOUT TO PATIO * * MASTER BEDROOM HAS FULL BATH & CEILING FAN * * ATTIC PULL DOWN FOR MORE STORAGE * * EXCLUDE BASEMENT REFRIGERATOR

13. 1996-01-22
    soldstatus $96,400
14. 1995-12-26
    soldstatus $96,400
15. 1995-10-23
    historical
16. 1995-09-25
    listed $96,900
17. 1988-08-22
    soldstatus $82,000

ⓘ Source: listings_history table (triggers on properties + properties_extension) + one-shot backfill from property_details.listing_events for pre-trigger history.

Tax reassessment forecast MD · Partial reset (capped growth)

• Current annual tax: $3,993 · $333/mo
• Projected year-2 tax: $3,993 · $333/mo
• Expected delta: $0/yr ($0/mo · 0.0%)

ⓘ Screening estimate from a state-policy table — verify with the county assessor before closing.

Climate risk First Street

• 🌊 Flood 1/10 Low FEMA zone X (unshaded) · 0% chance over 30 yrs
• 🔥 Wildfire 1/10 Low
• 🌡 Heat 7/10 Severe 7 d/yr ≥104°F today · 15 d/yr by 30 yrs out
• 💨 Wind 6/10 Major 27% chance of damaging wind over 30 yrs
• 🫁 Air quality 4/10 Moderate 5 unhealthy d/yr today · 7 by 30 yrs out

Taxation est. · year 1

• Rental income: $27,645
• − Mortgage interest: −$16,693
• − Property taxes: −$3,993
• − Insurance: −$1,490
• − Repairs & maintenance: −$2,212
• − Management: −$2,212
• − HOA: −$1,620
• − Depreciation: −$8,669
• Taxable loss: −$9,243
• Est. tax savings @ 24.0%: +$2,218
• After-tax cash flow: $-1,798/yr

For passive investors: Depreciation is non-cash, so a rental often shows a tax loss while cash-flowing — sheltering income. Rental losses are passive: they offset passive income freely, and up to $25,000/yr can offset ordinary (W-2) income if you actively participate and your MAGI is under $100k (phasing out to $0 by $150k); unused losses carry forward. On sale, claimed depreciation is recaptured at up to 25%, and gains may owe capital-gains tax (a 1031 exchange can defer both). Figures are a year-1 estimate at your 24.0% rate — not tax advice; consult a CPA.

Schools (NCES district)

• District: Baltimore County Public Schools
• NCES district ID: 2400120
• Math proficiency: 15% ▼ -16.00%
• Reading proficiency: 34% ▼ -5.00%
• Median HH income: $66,746
• Composite: 23.17/100
• National rank: #7948
• State rank: #11 of 24 in MD

Livability — Overlea

• Score: 81/100
• State rank: #38
• US rank: #1418

Category grades

Amenities A+ Commute A+ Cost of living B Crime F Employment C+ Housing A+ Health & safety A+ User ratings B

Schools grade is shown separately in the Schools card above.

Census & demographics

• Census place: Overlea, MD
• County: Baltimore County · 769,527 people
• Metro: Baltimore-Columbia-Towson, MD
• Population (ZIP): 66,334
• Household income: $83,517
• Rent vs Own: 35.5% rent · 64.5% own
• Severe rent burden: 2719.0

Population outlook (Baltimore County) Hauer SSP2

• Today (2025): 885,518 people
• By 2030: 909,272 · +2.7%
• By 2040: 951,547 · +7.5%
• By 2050: 990,955 · +11.9%
• By 2075: 1,086,411 · +22.7%
• By 2100: 1,135,078 · +28.2%

Race, ethnicity, and origin ACS 2023

• Neighborhood character: Diverse neighborhood (Simpson 0.58)
• Race & ethnicity: White 58% Black 28% Asian 5% Hispanic / Latino 5% Two or more races 5%
• Common ancestry: Romanian 5% Lithuanian 1% Italian 1%
• Foreign-born: 10% · Canada, China, South Korea
• Languages at home: 89% English-only · Spanish 3% Other Indo-European 2% Tagalog/Filipino 1%

Political lean MEDSL · Baltimore

• 2024 margin: Strong D (+24.5) · D 61.0% · R 36.5% · Other 2.5%
• 2008→2024 swing: +9.9pp toward D · 2008: 14.6pp · 2024: 24.5pp
• All cycles: 2024: D+24.5 2020: D+27.0 2016: D+17.4 2012: D+16.4 2008: D+14.6

Not yet ingested

• Civics: —

Market trends

• HPI YoY: ▼ -247.04%
• Current HPI: 254.3824
• Rent YoY: ▲ 6.68%
• Metro: Baltimore-Columbia-Towson, MD
• State GDP YoY: ▲ 2.97%
• F500 in state: 12

Industry mix (Fortune 500 HQ in MD)

Industry	F500 HQs	Revenue
▸Aerospace / Defense	1	$71B
▸Utilities	1	$25B
▸Hotels	1	$24B
▸Consumer Goods	1	$7B
▸Real Estate	1	$6B
▸Chemicals	1	$2B

Price history

+263.4% since first listed

19 events — show timeline

• 2026-06-12 Pending — BRIGHT MLS
• 2026-05-25 Contingent — BRIGHT MLS
• 2026-05-20 Listed $298,000 BRIGHT MLS
• 2026-05-14 Coming Soon $298,000 BRIGHT MLS
• 2023-11-08 Rental Removed $2,250 APPFOLIO
• 2023-10-17 Listed for Rent $2,250 APPFOLIO
• 2019-05-17 Sold (Public Records) $220,000 Public Records
• 2019-05-03 Sold (MLS) $220,000 BRIGHT MLS
• 2019-04-13 Contingent — BRIGHT MLS
• 2019-04-11 Listed $220,000 BRIGHT MLS
• 2004-04-23 Sold (Public Records) $126,500 Public Records
• 2004-03-31 Sold (MLS) $126,500 MRIS
• 2004-02-13 Delisted — MRIS
• 2004-02-06 Listed $125,900 MRIS
• 1996-01-22 Sold (Public Records) $96,400 Public Records
• 1995-12-26 Sold (MLS) $96,400 MRIS
• 1995-10-23 Delisted — MRIS
• 1995-09-25 Listed $96,900 MRIS
• 1988-08-22 Sold (Public Records) $82,000 Public Records

Property tax history

+4.4%/yr

Latest (2025): $3,993 · +6.2% YoY. Source: county tax records.