Northern Virginia · Home sale

4509 Carlby Ln in Alexandria sells for $3.2 million

A single-family home at 4509 Carlby Ln, Alexandria sold for $3,200,000 on November 4, 2026. See the seller and buyer net sheets for this sale.

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Automated sale report from public sales records · How we make these · Published November 13, 2026

Sold November 4, 2026 · Fairfax County, Virginia

Aerial view of 4509 Carlby Ln, Alexandria with the parcel outlined — Aerial photo: U.S. Geological Survey. Parcel outline: Fairfax County Department of Tax Administration. The photo can predate the sale. See the full listing on Zillow.

Aerial photo: U.S. Geological Survey. Parcel outline: Fairfax County Department of Tax Administration. The photo can predate the sale. See the full listing on Zillow.

Sale price: $3,200,000
Sold: November 4, 2026
Property type: Single-family home
Living area: 2,992 sq ft
Price per sq ft: $1,070
Year built: 1768

Seller and buyer net sheets for this sale

Seller Buyer

NetSheet.orgNovember 4, 2026

Seller's estimated net sheet

4509 Carlby Ln, Alexandria

Sale price	$3,200,000
Commission
Real estate commission (5%)	$160,000
Title and settlement
Settlement / closing fee	$450
Transfer taxes and recording
Grantor's tax	$3,200
Regional congestion relief fee (Northern Virginia grantor's tax)	$6,400
Prorations
Property tax proration (seller owes)	$10,020.82
Other costs
Wire / courier / payoff processing	$50
Total deductions	$180,120.82
Estimated net to seller	$3,019,879.18

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NetSheet.orgNovember 4, 2026

Buyer's estimated net sheet

4509 Carlby Ln, Alexandria

Purchase price	$3,200,000
New loan (80% of price)	$2,560,000
Down payment	$640,000
Title and settlement
Owner's title insurance policy	$8,290
Lender's title insurance policy	$250
Lender-required endorsements	$150
Settlement / closing fee	$450
Survey	$400
Transfer taxes and recording
State recordation tax on deed (grantee)	$8,000
Local recordation tax on deed (one-third of state)	$2,666.67
State recordation tax on deed of trust	$6,400
Local recordation tax on deed of trust	$2,133.33
Deed recording fee	$46
Mortgage recording fee	$66
Lender charges
Loan origination (1%)	$25,600
Appraisal	$550
Credit report	$60
Underwriting / processing	$995
Flood certification	$25
Tax service fee	$80
Prepaids and escrow reserves
Prepaid interest	$12,309.04
Homeowner's insurance (12 months)	$12,800
Insurance escrow reserve (2 mo)	$2,133.33
Property tax escrow reserve (3 mo)	$7,200
Credits
Property tax credit from seller	$10,020.82
Closing costs and prepaids	$90,604.37
Estimated cash to close	$720,583.55

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What these figures assume

A 5% total real estate commission.
The seller figure is before any mortgage payoff, which is not in the public record.
The buyer side assumes a conventional loan with 20% down.
Annual property tax estimated at 0.90% of price ($28,800).
Title and settlement fees are typical estimates, not quotes.

Selling in Alexandria?

Fairfax County transfer tax and closing costs

At $1,070 per square foot, the sale price was 47% above the market value on record. The home at 4509 Carlby Ln in Alexandria sold for $3,200,000 on November 4, 2026, according to the Fairfax County Department of Tax Administration's sales records.

An aerial photo shows the parcel directly on a river, with a dock. Other houses surround it, the aerial photo shows.

The Fairfax County Department of Tax Administration's records show 4 bedrooms, 3.5 bathrooms and 2,992 square feet of living area. They list a build year of 1768 and a 2.18-acre lot. The market value on record is $2,173,920.

This summary was written by AI from public sales records and checked by automated rules. The figures come from the record and the NetSheet.org rules engine. How we make these.

What were the closing costs in Fairfax County?

By our estimate, the seller's two largest charges, not counting commission and prorations, were $6,400 for the regional congestion relief fee (Northern Virginia grantor's tax) and $3,200 for the grantor's tax. Who pays what follows Fairfax County custom.

How much did the seller net?

By our estimate, the seller netted about $3,019,879. That assumes a 5% commission. It is before any mortgage payoff.

How much cash did the buyer bring to closing?

A buyer putting 20% down would need about $720,584 at closing. That covers the down payment and closing costs.

Run this net sheet with your numbers (free) See photos on Zillow

4509 Carlby Ln, Alexandria, VA.

Source: Fairfax County Department of Tax Administration, real estate sales data, document 28833-1541. Property details: Fairfax County Department of Tax Administration. Net sheets are estimates from the NetSheet.org rules engine, not the parties' actual closing statements. Request a correction or removal.