Gross rental yield — annual rent divided by purchase price — is the primary metric for buy-to-let investors comparing London areas. This guide ranks London boroughs and individual postcodes by gross yield using Land Registry transaction data and rental market analysis. London yields are structurally lower than other UK cities because property prices are high relative to rents, but significant variation exists between boroughs: outer London boroughs with affordable entry prices and strong commuter rental demand can offer yields of 9–10%, while prime central areas typically yield 3–5% gross (compensated by stronger capital growth potential).
London boroughs ranked by rental yield
Average gross yield across investment-grade postcodes per borough — highest first
Yields shown are gross — before mortgage, fees and void periods. Based on investment-grade postcodes tracked by LondonIQ.
Top 20 postcodes by gross rental yield
Individual postcodes with the highest gross yield — click any postcode for full investment data
Frequently asked questions
What is a good rental yield in London?
In London, a gross rental yield of 4–5% is considered average, 5–7% is good, and above 7% is high. London yields are generally lower than other UK cities because property prices are elevated relative to rents. The highest yields tend to be found in outer boroughs (Harrow, Havering, Redbridge) and in high-density inner areas with affordable entry prices but strong rental demand (parts of Islington, Newham, Tower Hamlets). Net yield — after mortgage, management fees, maintenance and void periods — is typically 1.5–2% lower than gross yield.
Which London areas have the highest rental yields?
Based on LondonIQ's investment data, the highest average gross yields are found in Harrow (9.7%), Brent (9.6%), Havering (9.5%) and Redbridge (9.3%). These outer London boroughs combine relatively affordable purchase prices with strong rental demand from professional commuters who cannot afford inner-London rents. High yields in inner areas like Islington (9.2%) often reflect smaller unit types (studios, one-beds) rather than broadly affordable prices.
Is high yield or capital growth better for London buy-to-let?
This is the classic yield-vs-growth tension. High-yield outer boroughs (Harrow, Havering) tend to show slower capital appreciation than high-liveability inner boroughs. Conversely, Wandsworth and Islington offer strong capital growth prospects with yields still above the London average. For a balanced buy-to-let strategy, look for boroughs where yield is above 7% AND price momentum is positive — this combination is rare but the most sustainable long-term position.
What costs should I factor in when calculating rental yield?
Gross yield = annual rent / purchase price. Net yield also deducts: mortgage interest (typically 4–5% in 2026), letting agent fees (8–15%), maintenance (1–2% of property value per year), landlord insurance, ground rent and service charge if leasehold, void periods (1–2 months per year), and potential capital gains tax on disposal. For a realistic return expectation in London, subtract 2–3% from gross yield to get net yield.
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