Condo Market/Buildings/Union House
Cow Hollow

Union House.

1515 Union St
Units
41
Built
2020
Median $/sf
$1,610

Units here trade around $1,610/sq ft. What would yours sell for?

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Cow HollowUnion House
For sale now

1 active listing in this building

Currently on the market. Tap any unit for full detail — or make an offer.

About

About Union House

Union House is a 41-unit condominium building in Cow Hollow, San Francisco, built in 2020. Over the last 12 months, units here have traded at a median of $1,610 per square foot.

Neighborhood
Cow Hollow
Property type
Condo
Built
2020
Units
41
The Dossier

Union House, by the numbers

Median $/sf
$1,610
Per square foot · last 12 months of sales
Median price
$2,537,500
Median closed price · last 12 months
Sold (12 mo)
4
Closed sales in the last 12 months
Last sale
$2,750,000
Unit 4B · Jun 23, 2026
Unit count
41
Mid-size building
Built
2020
2020's
vs Cow Hollow median ($1,674/sf)-4%
vs San Francisco median ($1,176/sf)+37%

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Unit-level sale history, owner tenure patterns, price trajectories, sale-to-list ratios, and off-market activity signals — all available to members. Free to sign up.

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Market analysis

How Union House compares

Trailing-12-month performance against the half-mile surroundings and the broader market, plus quarter-by-quarter $/ft² history.

How it compares

Cow Hollow, by $/sf

Median price per square foot across Cow Hollow buildings — last 12 months of closed sales. Union House is highlighted.

The Belvedere
2023
$2,117 /sf
2100 Green
21 units · 2005
$1,704 /sf
Union HouseThis building
41 units · 2020
$1,610 /sf
Run the numbers

Mortgage calculator

Back-of-envelope monthly cost for a purchase at Union House. Defaults use the building’s recent median price and conservative market assumptions.

Purchase price
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Down payment
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Interest rate
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Term
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Est. HOA
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Est. monthly
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Principal + interest + HOA
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Numbers add up?

Make this offer · $2,537,500
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Go deeper

Get the inside view on Union House

Three ways to learn more — no account required. Tell us where to send it and it’s on its way.

Watch the market review

A short video walkthrough of recent sales in Union House and the buildings around it — what’s moving, and what it means for value.

HOA & CC&R cheat sheet

A plain-English summary of Union House’s rules, fees, rental policy, and the fine print that actually matters — delivered within 24 hours.

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