6429 Idaho Ave · St. Louis, MO 63111

$89,900

3 bd · 1.0 ba · 780 sqft · SingleFamily public records · 76 Days on market

Built 1896 1,986 sqft lot $115/sqft · at area comps Est $172k · 48% under

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Why this score? — see what drove the B 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).

• Cash flow +28.7/30.0
• ARV discount +15.0/15.0
• DSCR +10.0/10.0
• 1% rule +7.3/10.0
• Rent growth +3.3/5.0
• Livability +2.5/5.0
• Condition / age +2.5/5.0
• Schools +1.2/10.0
• Appreciation +0.0/10.0

Listing remarks MLS

Located in the heart of South St. Louis, 6429 Idaho Avenue presents a fantastic opportunity for investors or buyers looking to build equity. This classic two-story home offers a flexible layout with three bedrooms and two full bathrooms, including two bedrooms and one full bath on the upper level, plus an additional bedroom and full bath on the main floor—ideal for multi-generational living or added rental potential. With its solid structure and traditional charm, this property is ready for your vision and updates. Whether you’re planning a renovation for resale, a long-term rental, or a personalized primary residence, the layout provides a strong foundation to maximize value. The main level bedroom and bath add convenience and versatility, while the second floor offers a more private sleeping area. Situated on a quiet residential street with easy access to local amenities, schools, and major thoroughfares, this home combines location with opportunity. Bring your ideas and unlock the full potential of this promising investment property.

Key facts

• 1,986 sq ft lot
• Built 1896
• Listed 76 days

What this means for you Summary

Snapshot

• This is a 3-bed/1.0-bath single-family listed at $90k.

Deal economics

• At list price, monthly cash flow is $298 ($4k/yr) — positive.
• The deal already cash-flows at list — no discount required.
• Meets the 1% rule at list price ($1k rent vs $90k).
• Recommended offer: $85k (6.0% below list) — sets the bar for market timing.
• Cap rate 10.3% vs local median 5.0% in St. Louis — top-decile yield for the area; either an underpriced asset or a hidden risk that comps aren't pricing in. Stress-test before assuming the spread holds.

Location & tenants

• Location reads: area grade B — affects rentability + tenant quality, not the cash-flow math above.
• St. Louis City (urban): math 10% / reading 18% proficiency, ranked #312 of 324 in MO (top 96%) — low school quality limits family demand, transient renter base, plan for 1-2y turnover; 80% free/reduced lunch — lower-income household profile, screen leases tightly.
• Market conditions: Rents rising (+3.3%/yr); 125 active listings in the ZIP; 40 comparable units currently listed for rent nearby; rentals at typical pace (median 24d on market — plan ~3-4 weeks tenant-placement turnaround); 48% of comp listings sitting > 30 days — soft ceiling on asking rent; 294 units permitted in St. Louis city in 2024 (227 in 5+ unit buildings).

Forward outlook

• Local home prices are declining (-3.0%/yr); year-one equity from $622 of loan paydown is wiped out by about $3k of value loss. Plan a longer hold.
• St. Louis County population projected to shrink 6% by 2050 — rents likely to lag national; underwrite the cash flow, not the appreciation.
• At projected returns (-3.0% appreciation + 3.3% rent growth), your $25k cash investment doubles in ~9 years — after that, you're playing with house money.

Negotiation context

• It's been on market 76 days — a 6% lower offer ($85k) is reasonable based on typical stale-listing flexibility.

Risks & watch-outs

• Watch-outs: built in 1896 — expect roof / HVAC / electrical / plumbing capex.
• Climate carrying-cost: extreme-heat days projected 7→21/yr by 2055 (HVAC capex compounding) — expect insurance premiums to compound above CPI over the hold.

Recommended offer $84,506 (6.0% below list)

Questions for the listing agent

1. It's been on market 76 days. Have you received any prior offers? Is the seller open to a 6% concession, seller financing, or rate buy-down credit?
2. Built in 1896 — when were the roof, HVAC, electrical panel, plumbing, and water heater last replaced?
3. Why hasn't it sold? Are there any deal-killer items the seller is aware of (foundation, flood, title, zoning, code violations)?
4. Is there a deadline driving the sale (1031 exchange, divorce, estate, relocation)? That informs how much negotiation room exists.
5. 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.
6. 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.
7. 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: 1.23% ✓
• Cap rate: 10.27%
• Cash-on-cash: 14.21%
• DSCR: 1.63
• GRM: 6.8

CMA / ARV

• ARV (median comp): $172,264
• List price: $89,900
• Delta: -47.81%
• 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
925 Iron	0.20mi	2/1.0 (-1)	714 (-8%)	0mo	$130,000	$182	71
6608 Idaho Ave	0.06mi	2/1.0 (-1)	858 (+10%)	8mo	$44,900	$52	70
6127 Alaska Ave	0.26mi	2/1.0 (-1)	864 (+11%)	0mo	$94,900	$110	64
7116 Vermont Ave	0.42mi	2/1.0 (-1)	759 (-3%)	11mo	$129,900	$171	62
6135 Idaho Ave	0.23mi	2/1.0 (-1)	875 (+12%)	4mo	$44,130	$50	61
6209 Idaho Ave	0.18mi	2/2.0 (-1)	865 (+11%)	10mo	$149,000	$172	56
3749 Roswell Ave	0.70mi	2/1.0 (-1)	768 (-2%)	8mo	$147,000	$191	53
7100 Idaho Ave	0.39mi	2/1.0 (-1)	728 (-7%)	16mo	$119,900	$165	52
125 Koeln Ave	0.74mi	2/1.0 (-1)	833 (+7%)	2mo	$110,000	$132	48
7601 Alabama Ave	0.73mi	2/2.0 (-1)	829 (+6%)	14mo	$65,000	$78	35
606 Fassen St	0.64mi	2/1.0 (-1)	875 (+12%)	14mo	$75,000	$86	33
3718 Robert Ave	0.71mi	2/2.0 (-1)	864 (+11%)	15mo	$219,000	$253	28

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 · 3.27% rent growth · sell at horizon

5-year hold

• IRR: 4.8%
• Equity multiple: 1.19×
• Total profit: $4,710
• Equity at exit: $13,404

10-year hold

• IRR: 14.5%
• Equity multiple: 2.18×
• Total profit: $29,740
• Equity at exit: $7,773

Cash invested: $25,172 (down + closing). Projections, not guarantees.

Landlord ↔ Tenant lean methodology

• Overall (STATE): 81 Strongly Landlord-Friendly
• State Missouri: 81 Strongly Landlord-Friendly · R+10
• County: — inherits STATE
• City: — inherits STATE

Generally landlord-friendly; St Louis has some habitability requirements.

Methodology + full state rankings →

ZIP-level market 63111

• Rents YoY: 3.3%
• Active inventory: 125
• Price-to-rent: 6.8×

Monthly cashflow live

• Estimated rent: $1,103 high
• Mortgage (P&I): −$471
• Tax from tax record: −$64 /mo · $768/yr
• Insurance: −$37
• HOA: −$0
• Vacancy / Maint / Mgmt: −$232
• Net cashflow: $298

Break-even live

Break-even rent $725

Max offer price $89,900

Occupancy floor 68%

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: $22,475
• Closing costs: $2,697
• Reserves months: —
• Total cash needed: —

Rent comps 40 comps

Address	Beds	Baths	Sqft	Rent	$/sqft	DOM	Units	Dist
6436 Idaho Ave Saint Louis, MO	2.0	1.0	1050	$995	$0.95	43d	1	0.03mi
3601 Holly Hills Blvd Apt 19 St. Louis, MO	2.0	1.0	700	$875	$1.25	2d	1	0.33mi
128 Haven St Unit 2F St. Louis, MO	2.0	1.0	900	$950	$1.06	10d	1	0.40mi
711 Wilmington Ave Unit NA St. Louis, MO	2.0	1.0	1051	$1,300	$1.24	43d	1	0.40mi
712 Dover Pl Saint Louis, MO	2.0	1.0	1100	$900	$0.82	43d	1	0.44mi
712 Dover Pl Unit 1FL St. Louis, MO	2.0	1.0	1100	$1,000	$0.91	43d	1	0.44mi
7024 Pennsylvania Ave Unit F St. Louis, MO	2.0	1.0	1081	$930	$0.86	16d	1	0.51mi
7417 Vermont Ave St. Louis, MO	1.0–2.0	1.0–2.0	1144	$1,600	$1.40	1d	8	0.58mi
7417 Vermont Ave Unit 103 St. Louis, MO	2.0	2.0	1069	$1,500	$1.40	14d	1	0.59mi
7109 Eugene Ave Saint Louis, MO	3.0	2.0	1029	$1,495	$1.45	2d	1	0.59mi
125 Koeln Ave Saint Louis, MO	2.0	1.0	833	$1,499	$1.80	43d	1	0.71mi
5707 Dewey Ave Unit 1F St. Louis, MO	2.0	1.0	1000	$1,050	$1.05	14d	1	0.71mi
3815 Wilmington Ave Apt 2N St. Louis, MO	2.0	1.0	800	$1,095	$1.37	43d	1	0.72mi
7614 Virginia Ave Unit 7614 St. Louis, MO	2.0	1.0	750	$750	$1.00	23d	1	0.74mi
440 Eichelberger St Saint Louis, MO	2.0	1.0	750	$850	$1.13	2d	1	0.81mi
5305 S Compton Ave St. Louis, MO	2.0	1.0	750	$825	$1.10	43d	1	0.81mi
813 W Courtois St Apt C St. Louis, MO	2.0	1.0	1000	$895	$0.90	43d	1	0.82mi
807 W Courtois St Apt D St. Louis, MO	2.0	1.0	900	$925	$1.03	43d	1	0.82mi
5217 S Grand Blvd Saint Louis, MO	2.0	1.0	870	$1,125	$1.29	14d	1	0.86mi
7851 Bandero Dr Saint Louis, MO	1.0–2.0	1.0	800	$1,100	$1.38	11d	1	0.89mi
3824 Eiler St Saint Louis, MO	2.0	1.0	1000	$1,050	$1.05	23d	1	0.94mi
5102 Wicklow Pl Saint Louis, MO	2.0	1.5	928	$1,350	$1.45	23d	1	0.95mi
3243 Delor St Unit 3243 St. Louis, MO	3.0	1.0	1100	$1,250	$1.14	21d	1	1.01mi
5111A S Broadway St St. Louis, MO	2.0	1.0	800	$825	$1.03	23d	1	1.02mi
5109 S Broadway St Unit A St. Louis, MO	2.0	1.0	800	$825	$1.03	23d	1	1.03mi
3324 Liberty St Saint Louis, MO	2.0	1.0	1100	$950	$0.86	16d	1	1.03mi
3659 Delor St Unit 3659-1F St. Louis, MO	2.0	1.5	900	$1,115	$1.24	43d	1	1.04mi
5027 S Broadway St Unit 5027 St. Louis, MO	2.0	1.0	900	$950	$1.06	43d	1	1.05mi
3705 Delor St Unit 3705-1F St. Louis, MO	2.0	1.5	900	$1,225	$1.36	43d	1	1.05mi
8125 Michigan Ave St. Louis, MO	1.0–2.0	1.0–2.0	797	$1,150	$1.44	14d	1	1.06mi
7113 Leona St Saint Louis, MO	3.0	1.0	864	$1,765	$2.04	43d	1	1.07mi
3717 Delor St Unit 37172-F St. Louis, MO	2.0	1.5	900	$1,115	$1.24	23d	1	1.07mi
3661 Delor St Unit 3661-1F St. Louis, MO	2.0	1.5	900	$1,225	$1.36	43d	1	1.07mi
3661 Delor St Unit 3661-2F St. Louis, MO	2.0	1.5	900	$1,115	$1.24	43d	1	1.07mi
5009 S Broadway St Unit 5011A St. Louis, MO	2.0	1.0	990	$1,200	$1.21	43d	1	1.07mi
3709 Delor St Unit 3709-1F St. Louis, MO	2.0	1.5	900	$1,225	$1.36	43d	1	1.08mi
3711 Delor St Unit 3711-1F St. Louis, MO	2.0	1.5	900	$1,225	$1.36	23d	1	1.08mi
3729 Delor St Unit 37292-F St. Louis, MO	2.0	1.5	900	$1,115	$1.24	23d	1	1.09mi
3707a Delor St Unit 3707-2F St. Louis, MO	2.0	1.5	900	$1,115	$1.24	43d	1	1.09mi
3737 Delor St Unit 3737-2F St. Louis, MO	2.0	1.5	900	$1,115	$1.24	43d	1	1.09mi

Listing history 21 events

1. 2026-06-18
   days on market $89,900 Active 76 DOM
2. 2026-06-17
   days on market $89,900 Active 75 DOM
3. 2026-06-16
   days on market $89,900 Active 74 DOM
4. 2026-06-16
   price $89,900 Active 73 DOM
5. 2026-06-15
   days on market $94,900 Active 73 DOM
6. 2026-06-13
   days on market $94,900 Active 71 DOM
7. 2026-06-09
   days on market $94,900 Active 67 DOM
8. 2026-06-08
   days on market $94,900 Active 66 DOM
9. 2026-06-08
   days on market $94,900 Active 65 DOM
10. 2026-06-05
    days on market $94,900 Active 62 DOM
11. 2026-06-03
    days on market $94,900 Active 61 DOM
12. 2026-06-02
    days on market $94,900 Active 60 DOM
13. 2026-06-01
    days on market $94,900 Active 59 DOM
14. 2026-05-31
    days on market $94,900 Active 58 DOM
15. 2026-04-21
    price $99,900 1066-char remark

    Show marketing remark (1066 chars)

    Located in the heart of South St. Louis, 6429 Idaho Avenue presents a fantastic opportunity for investors or buyers looking to build equity. This classic two-story home offers a flexible layout with three bedrooms and two full bathrooms, including two bedrooms and one full bath on the upper level, plus an additional bedroom and full bath on the main floor—ideal for multi-generational living or added rental potential. With its solid structure and traditional charm, this property is ready for your vision and updates. Whether you’re planning a renovation for resale, a long-term rental, or a personalized primary residence, the layout provides a strong foundation to maximize value. The main level bedroom and bath add convenience and versatility, while the second floor offers a more private sleeping area. Situated on a quiet residential street with easy access to local amenities, schools, and major thoroughfares, this home combines location with opportunity. Bring your ideas and unlock the full potential of this promising investment property.

16. 2026-04-03
    listed $109,900 Active 1066-char remark

    Show marketing remark (1066 chars)

    Located in the heart of South St. Louis, 6429 Idaho Avenue presents a fantastic opportunity for investors or buyers looking to build equity. This classic two-story home offers a flexible layout with three bedrooms and two full bathrooms, including two bedrooms and one full bath on the upper level, plus an additional bedroom and full bath on the main floor—ideal for multi-generational living or added rental potential. With its solid structure and traditional charm, this property is ready for your vision and updates. Whether you’re planning a renovation for resale, a long-term rental, or a personalized primary residence, the layout provides a strong foundation to maximize value. The main level bedroom and bath add convenience and versatility, while the second floor offers a more private sleeping area. Situated on a quiet residential street with easy access to local amenities, schools, and major thoroughfares, this home combines location with opportunity. Bring your ideas and unlock the full potential of this promising investment property.

17. 2024-03-20
    soldstatus $123,000
18. 2007-07-10
    soldstatus $107,000
19. 2007-01-04
    soldstatus $99,900
20. 2006-06-07
    soldstatus $93,000
21. 1991-07-03
    soldstatus

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

Tax reassessment forecast MO · Resets to sale price

• Current annual tax: $768 · $64/mo
• Projected year-2 tax: $872 · $73/mo
• Expected delta: +$104/yr (+$9/mo · 13.5%)

ⓘ 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 5/10 Major 7 d/yr ≥109°F today · 21 d/yr by 30 yrs out
• 💨 Wind 2/10 Low 100% chance of damaging wind over 30 yrs
• 🫁 Air quality 3/10 Moderate 3 unhealthy d/yr today · 4 by 30 yrs out

Taxation est. · year 1

• Rental income: $13,231
• − Mortgage interest: −$5,036
• − Property taxes: −$768
• − Insurance: −$450
• − Repairs & maintenance: −$1,059
• − Management: −$1,059
• − Depreciation: −$2,615
• Taxable income: $2,246
• Est. tax owed @ 24.0%: −$539
• After-tax cash flow: $3,039/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: St. Louis City
• NCES district ID: 2929280
• Math proficiency: 10% ▼ -6.00%
• Reading proficiency: 18% ▼ -3.00%
• Median HH income: $35,685
• Composite: 11.54/100
• National rank: #9699
• State rank: #312 of 324 in MO

Livability — St. Louis

No livability data for this city. (Only ~50 U.S. cities are tracked.)

Census & demographics

• Census place: St. Louis, MO
• County: Saint Louis City · 254,015 people
• City population: 283,259
• Metro: St. Louis, MO-IL
• Population (ZIP): 18,851
• Household income: $47,039
• Rent vs Own: 61.6% rent · 38.4% own
• Severe rent burden: 1364.0

Population outlook (St. Louis County) Hauer SSP2

• Today (2025): 315,737 people
• By 2030: 313,865 · -0.6%
• By 2040: 305,439 · -3.3%
• By 2050: 296,529 · -6.1%
• By 2075: 271,028 · -14.2%
• By 2100: 255,359 · -19.1%

Race, ethnicity, and origin ACS 2023

• Neighborhood character: Diverse neighborhood (Simpson 0.65)
• Race & ethnicity: Black 42% White 41% Two or more races 11% Hispanic / Latino 9% Asian 1%
• Hispanic origin (detail): Mexican 6%
• Common ancestry: Lithuanian 3% Slovak 1% Romanian 1%
• Foreign-born: 7% · Canada, India
• Languages at home: 90% English-only · Spanish 7% Other Indo-European 1%

Political lean MEDSL · St. Louis

• 2024 margin: Solid D (+64.7) · D 81.4% · R 16.7% · Other 2.0%
• 2008→2024 swing: -3.5pp toward R · 2008: 68.2pp · 2024: 64.7pp
• All cycles: 2024: D+64.7 2020: D+66.2 2016: D+63.7 2012: D+66.6 2008: D+68.2

Not yet ingested

• Civics: —

Market trends

• HPI YoY: ▼ -92.80%
• Current HPI: 169.4644
• Rent YoY: ▲ 3.27%
• Metro: St. Louis, MO-IL
• State GDP YoY: ▲ 1.84%
• F500 in state: 20

Industry mix (Fortune 500 HQ in MO)

Industry	F500 HQs	Revenue
▸Healthcare	1	$163B
▸Insurance	1	$21B
▸Industrial Technology	1	$17B
▸Retail	1	$16B
▸Industrial Distribution	1	$10B
▸Utilities	1	$9B

Price history

+7.4% since first listed

7 events — show timeline

• 2026-04-21 Price Changed $99,900 MARIS as Distributed by MLS Grid
• 2026-04-03 Listed $109,900 MARIS as Distributed by MLS Grid
• 2024-03-20 Sold (Public Records) $123,000 Public Records
• 2007-07-10 Sold (Public Records) $107,000 Public Records
• 2007-01-04 Sold (Public Records) $99,900 Public Records
• 2006-06-07 Sold (Public Records) $93,000 Public Records
• 1991-07-03 Sold (Public Records) — Public Records

Property tax history

+3.2%/yr

Latest (2024): $768 · +5.0% YoY. Source: county tax records.