---
dale_ledger: true
type: property
town: mamaroneck
town_label: Town of Mamaroneck
swis: 553289
address: 138 Chatsworth Ave
parcel_id: 1-13-20
slug: 138-chatsworth-ave
year: 2026
full_market: 1112000
assessed: 1112000
land: 485000
estimated_tax: 23567
school_zone: null
school_district: Mamaroneck UFSD (276 parcels Scarsdale UFSD)
property_class: Single-family
acreage: null
owner_on_roll: Deitz Roger
html_url: "https://daleledger.com/mamaroneck/property/138-chatsworth-ave/"
app_url: "https://daleledger.com/mamaroneck/?parcel=1-13-20"
markdown_url: "https://daleledger.com/properties/mamaroneck/138-chatsworth-ave.md"
official_confirm_url: "https://www.townofmamaroneckny.gov/183/Assessor"
publisher: Infarill LLC
unofficial: true
---

# 138 Chatsworth Ave, Town of Mamaroneck, NY 10543

> Unofficial Dale Ledger property card for AI retrieval. Confirm figures on [official rolls](https://www.townofmamaroneckny.gov/183/Assessor) before decisions.

## Snapshot

- **Parcel ID (SBL):** `1-13-20`
- **SWIS:** 553289
- **Roll year:** 2026
- **Full market value:** $1,112,000
- **Assessed value:** $1,112,000
- **Land:** $485,000
- **Estimated annual tax:** $23,567 (FY 2026 town & county / 2025-26 school)
- **Property type:** Single-family
- **School district:** Mamaroneck UFSD (276 parcels Scarsdale UFSD)
- **Owner on roll:** Deitz Roger

## Questions this page answers

- What did this home assess for on the 2026 Town of Mamaroneck roll?
- What is a rough estimated property tax from published mill rates?
- Where do I confirm the official figure?

## Assessment history (on-file years)

| Year | Assessed | Full market | Land |
| --- | ---: | ---: | ---: |
| 2026 | $1,112,000 | $1,112,000 | $485,000 |
| 2025 | $1,129,000 | $1,129,000 | $485,000 |
| 2024 | $1,075,000 | $1,075,000 | $485,000 |

_History only includes years Dale Ledger has ingested for this town — not a full 10-year assessor archive._

## Permits

Permit history is not indexed in the Town of Mamaroneck Dale Ledger edition yet. Check [the Building Department](https://www.townofmamaroneckny.gov/183/Assessor).

## Links

- Interactive app card: https://daleledger.com/mamaroneck/?parcel=1-13-20
- HTML property page: https://daleledger.com/mamaroneck/property/138-chatsworth-ave/
- Street hub: https://daleledger.com/mamaroneck/streets/chatsworth-ave/
- Town markdown: https://daleledger.com/towns/mamaroneck.md
- Official confirm: https://www.townofmamaroneckny.gov/183/Assessor

## Disclaimer

Unofficial compilation by Infarill LLC. Not affiliated with any municipality or school district. Tax figures are estimates from published mill rates (special districts may be excluded). Not legal, tax, or real-estate advice.