Private advisory for city homes

Find the right address before the market catches up.

Keystone pairs neighborhood intelligence with a map-first buying process for Manhattan and Brooklyn homes between $800K and $2M.

0Closed buyer and seller transactions
0Average days to accepted offer
0%Client satisfaction after closing
Sarah Kim, Keystone senior buyer advisor
Lead advisor

Sarah Kim

Sarah leads Keystone's Manhattan and Brooklyn buyer desk, with a focus on quiet inventory, pricing leverage, and closing timelines for finance-driven purchases.

12 yrsNYC advisory
$420MCareer volume
31Off-market wins
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Financing snapshot

Mortgage calculator

Estimate monthly principal and interest before Sarah prepares a full lender scenario.

Estimated monthly payment $6,498 Principal and interest only. Taxes, insurance, common charges, and lender fees are not included.
Client notes

Clear guidance at every offer.

“Keystone showed us three comparable sales the listing agent had not priced in. We won below ask and still closed in 29 days.”

Maya R.Buyer, Chelsea condo

“Sarah filtered out the noise fast. Every tour had a financing angle, renovation estimate, and resale thesis attached.”

Daniel ChoBuyer, Brooklyn Heights loft