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Altadena, CA 91001 · Porter Ave

2403 Porter Ave

Built 1947 · 2,202 sq ft
LOT 9,105 SQ FT · 2 STRUCTURES · APN 5846-021-002Lot Structure
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The home

What's on record

Year built
1947
Living area
2,202 sqft
Lot size
9,105 sqft
Structures on lot
2 main home plus another structure: a garage, guest house or ADU
Bedrooms
4
Bathrooms
2
Home type
Single-family
Parcel (APN)
5846-021-002

Major systems

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What's coming up

Systems and what to plan for

0 worth planning for · 2 to confirm. Open "How we estimate this" on any card.
RoofOn record 2021
Expected 2041 to 2051From the 2021 permit
HVACConfirm the year
Probably replaced alreadyWhen was it done?
Water heaterConfirm the year
Probably replaced alreadyWhen was it done?

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Nearby on this street
2778 Porter Aveon record · 1,687 sqft2565 Porter Aveon record · 1,950 sqft2777 Porter Aveon record · 2,990 sqft2759 Porter Aveon record · 2,140 sqft2415 Porter Aveon record · 1,611 sqft2746 Porter Aveon record · 1,844 sqft

See all 23 homes on Porter Ave →

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The story of this home

Your home's update timeline

  • 2026
    permit on file, unconfirmedHeating & cooling: Mechanical- Remodel Existing 2-Story Single Family Residence 141 Sf To Convert Habitable Space Into A New Bedroom And Add 82 Sf Bathroom On Second Floor
  • 2026
    permit on file, unconfirmedHeating & cooling: Mechanical- Eaton Fire Rebuild - New Detached 1-Story 602 Sf Adu (1 Bedroom And 1 Bathroom) With 40 Sf Entry Porch. In Relation To Permit# Unc-Bldr250819010394
  • 2026
    permit on file, unconfirmedPlumbing: Sewer- Remodel Existing 2-Story Single Family Residence 141 Sf To Convert Habitable Space Into A New Bedroom And Add 82 Sf Bathroom On Second Floor
  • 2026
    permit on file, unconfirmedElectrical: Electrical- Remodel Existing 2-Story Single Family Residence 141 Sf To Convert Habitable Space Into A New Bedroom And Add 82 Sf Bathroom On Second Floor
  • 2026
    permit on file, unconfirmedPlumbing: Plumbing- Eaton Fire Rebuild - New Detached 1-Story 602 Sf Adu (1 Bedroom And 1 Bathroom) With 40 Sf Entry Porch. In Relation To Permit# Unc-Bldr250819010394
  • 2026
    permit on file, unconfirmedPlumbing: Plumbing- Remodel Existing 2-Story Single Family Residence 141 Sf To Convert Habitable Space Into A New Bedroom And Add 82 Sf Bathroom On Second Floor
  • 2026
    permit on file, unconfirmedPlumbing: Sewer- Eaton Fire Rebuild - New Detached 1-Story 602 Sf Adu (1 Bedroom And 1 Bathroom) With 40 Sf Entry Porch. In Relation To Permit# Unc-Bldr250819010394
  • 2026
    permit on file, unconfirmedElectrical: Electrical- Eaton Fire Rebuild - New Detached 1-Story 602 Sf Adu (1 Bedroom And 1 Bathroom) With 40 Sf Entry Porch. In Relation To Permit# Unc-Bldr250819010394
  • 2025
    permit on file, unconfirmedGeneral remodel: Add Sill Plate Anchor Bolts Per La City Standard Plan #1; No Foundation Replacement (Earthquake Hazard Reduction Per Chapter 92 Of The Los Angeles Building Code). (Houses, Residential Buildings Up To 3 Stories And Up To 4 Units)
  • 2021
    permit on fileRoof: House Only 24Sqft Remove Existing Roofing Materials. Install 30Yrs Shingles Over New Sheathing. Owens Corning Sierra Gray Crrc: 0890-0013 Sri: 20

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