To approximate the area of the house's lot in square feet:

1 acre ≈ 40,000 square feet.

Since the lot is 0.5 acre:

$\text{Area of lot} = 0.5 \times 40,000 \, \text{sq ft} = 20,000 \, \text{sq ft}$

Thus, the house's lot is approximately 20,000 square feet.

Would you like a more detailed explanation or have any questions?

Here are some related questions:

1. How would the lot's area change if it were 0.75 acres instead?
2. If the lot were measured in square meters, how would you convert this?
3. How many square feet would 2 acres represent?
4. What is the area of a 1.25-acre lot in square feet?
5. How does this compare to the size of a football field (about 57,600 sq ft)?

Tip: To convert between different units of area, always remember the conversion factor between acres and square feet.