Adding 1,000 sq ft of finished basement space is a power move for this Vienna property. You’re currently at 3,587 sq ft; this addition pushes you into the "luxury tier" of 4,500+ sq ft. This puts you in direct competition with elite neighbors like 1224 Carpers Farm Way, which sold for $1.75M.
In Fairfax County, finished basements significantly boost appraisal value, especially if you include a walk-out or a legal fifth bedroom. Expect the renovation to cost between $60,000 and $100,000 depending on finishes, but the market value jump could easily exceed $150,000.
| Improvement Impact | Estimated Change |
| :--- | :--- |
| Total Living Area | 4,587 sq ft |
| Estimated Value Increase | $150,000 - $225,000 |
| Rent Potential Boost | +$400 - $700 /month |
| Construction Cost Est. | $60,000 - $100,000 |
From a tax perspective, finishing the basement will trigger a reassessment. However, the equity gain and increased rental yield—potentially pushing rent past $6,500—usually far outweigh the tax hike. It’s a high-ROI strategy for this specific 22182 zip code.