# What is a 'Cistern' and can I mortgage it?

> A cistern is an underground water storage tank (often filled by truck).

Category: Financing
Last verified: 2026-02-18
Source: https://ratellow.com/faqs/financing/what-is-a-cistern-and-can-i-mortgage-it

## Answer
A cistern is an underground water storage tank (often filled by truck). Some lenders will not mortgage properties that rely solely on a cistern because it's considered 'non-permanent' water. However, if cisterns are common in the local area, 'B-lenders' and some credit unions will accept them with a 20%+ down payment.

## Related guide
- https://ratellow.com/guides/rural-agricultural-mortgage

## Sources
- CMHC Rural Underwriting — https://assets.cmhc-schl.gc.ca/sf/project/cmhc/pdfs/factsheets/new/cmhc-quick-reference.pdf
- B-20 Property Valuation — https://www.osfi-bsif.gc.ca/en/guidance/guidance-library/residential-mortgage-underwriting-practices-procedures-guideline-2017#2.4.2