Montgomery County · Commercial sale
Office building at 400 Professional Dr in Gaithersburg sells for $6.35 million
An office building at 400 Professional Dr, Gaithersburg sold for $6,350,000 on August 11, 2026. See the seller and buyer net sheets for this sale.
- Sale price
- $6,350,000
- Sold
- August 11, 2026
- Property type
- Office building
- Building area
- 134,722 sq ft
- Price per sq ft
- $47
- Year built
- 1999
An office building at 400 Professional Dr in Gaithersburg sold for $6,350,000 on August 11, 2026, according to the Maryland Department of Assessments and Taxation's property records. The sale price is 71% below the market value of $21,952,100 shown on the Assessor's records.
The 134,722-square-foot building, constructed in 1999, sits on an 8.85-acre lot. At that size, the price works out to $47 per square foot.
400 Professional LLC was listed as the seller in the transaction.
What this sale costs to close
What does closing cost at this price? Under Montgomery County custom the seller's larger charges are $67,847.50 for the recordation tax (Montgomery County) and $31,750 for the county transfer tax (Montgomery County). The seller's estimated net is $6,175,125 before brokerage commissions and any loan payoff. A cash buyer would need about $6,540,373 at closing.
Source: Maryland Department of Assessments and Taxation, Real Property Assessments (Maryland Open Data), document 70816-0323. Property details: Montgomery County Assessor. Net sheets are estimates from the NetSheet.org rules engine, not the parties' actual closing statements. Request a correction or removal.
