Homes in PE21 sell for a median of £189,950 across 613 sales over two years (HM Land Registry), which is -10% against the Boston median of £210,000. Set against the local average rent of £803 a month (ONS), that implies a 5.1% gross yield here versus 4.6% for Boston as a whole.
Rents are published per district, not per postcode, so the yield above applies the Boston average rent to PE21 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.
PE21 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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