Two of Northern Virginia's largest counties — different price points, tax rates, Metro access, and 55+ community options. Here's the honest comparison for active adult buyers.
Loudoun County's effective property tax rate is slightly lower than Fairfax County's — but Loudoun home prices are also high, so the dollar savings are modest at equivalent home values. The more meaningful tax advantage comes when comparing either county to Prince William, Fauquier, or Frederick — those outer counties deliver meaningfully lower annual property tax bills at comparable home values. Between Fairfax and Loudoun specifically, the tax difference for most 55+ buyers is a few hundred to a thousand dollars per year — worth knowing but rarely a deciding factor.
Fairfax County has more Metro stations and more line coverage than Loudoun — the Orange, Silver, and Blue lines all run through Fairfax with stations throughout. Loudoun has the Silver Line extension to Ashburn, Loudoun Gateway, and Dulles. For 55+ buyers, the relevant question is usually "how close is the nearest Metro to the specific community I'm considering" — not county-level coverage. Atrium at MetroWest in Fairfax is walking distance to Vienna Metro; Birchwood in Loudoun is 5 minutes from Ashburn Metro. Both are excellent Metro access stories. Community selection matters more than county selection on this dimension.
Loudoun County has the highest concentration of quality 55+ communities in the NoVA region — Birchwood at Brambleton, Potomac Green, Lansdowne Woods, Regency at Ashburn, Central Parke at Lowes Island, Villages at Broadlands, Signature at Broadlands, and others. The selection within Loudoun is broader than Fairfax for this specific buyer profile. Fairfax has fewer dedicated 55+ communities but some unique options — particularly Atrium at MetroWest's Metro-adjacent condo product, which has no Loudoun equivalent.
Nova55Living covers 55+ communities in both counties. Call for a direct conversation about which county and which specific communities best match your budget and lifestyle.