Homes in BH20 sell for a median of £372,500 across 296 sales over two years (HM Land Registry), which is +8% against the Dorset median of £345,000. Set against the local average rent of £1,051 a month (ONS), that implies a 3.4% gross yield here versus 3.7% for Dorset as a whole.
Rents are published per district, not per postcode, so the yield above applies the Dorset average rent to BH20 prices. It's the right way to compare postcodes on entry price, but rents do vary street by street, and gross yield ignores costs, voids and mortgage interest.
BH20 averages tell you where to look, not whether one particular flat stacks up. Paste a listing and gemhome runs the actual numbers: yield, cash flow, the lender stress test, EPC work and what the public records say about that specific address.
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