Forestdale, AL vs Mountain Brook, AL
The cost of living difference between Forestdale, AL and Mountain Brook, AL is dramatic. Forestdale is 47.9% cheaper than Mountain Brook, a gap that translates to thousands of dollars per year in household expenses. Forestdale has a cost index of 78 while Mountain Brook sits at 149, making this one of the more striking comparisons on our site. Relocating between these cities would require a serious reassessment of budget and lifestyle expectations.
On the housing front, median rent in Forestdale is $1,094/month compared to $1,444/month in Mountain Brook — a 24% difference. Home values follow the same pattern: Forestdale is more affordable at $150,700 median vs $891,300.
Median household income in Forestdale is $57,145 compared to $191,128 in Mountain Brook (-70.1%). While Mountain Brook is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Forestdale spend roughly 23% of their income on rent, more than the 9.1% in Mountain Brook.
Climate-wise, both cities share similar average temperatures (63.9°F vs 63.9°F). Mountain Brook receives more rainfall at 56.6" per year compared to 56.6" in Forestdale.
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Housing
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Rent by Bedroom Size
HUD Fair Market Rent (FY 2026) — metro area average
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Climate
NOAA 30-year normals (1991-2020)