Not all London boroughs are equal for HMO investment. Some have cheap entry prices but refuse most planning applications. Others have no Article 4 restrictions but property prices are so high the yields don’t work.

The right borough balances three things: a purchase price that makes the maths work, a regulatory environment you can navigate, and tenant demand strong enough to keep rooms filled.

This guide covers the boroughs where that balance exists in 2026. It also flags the ones that look good on paper but aren’t.

What Makes a Good HMO Borough?

Four things matter:

Purchase price. You need a three or four-bed house for under £500,000 to make a six-bed HMO conversion stack up in London. Above that, yields get compressed too far.

Article 4 status. Boroughs without Article 4 Directions let you convert from C3 to C4 under permitted development — no planning application, no eight-week wait, no refusal risk. Boroughs with Article 4 add cost, time, and uncertainty.

Licensing regime. Some boroughs are straightforward. Others run mandatory, additional, and selective licensing schemes simultaneously, with fees that vary wildly. Tower Hamlets hiked its mandatory HMO fee 75% to £1,500 for 2026.

Tenant demand. Transport links, proximity to employment, local amenities. Young professionals want Zone 2–4 locations with good connections to central London.

Boroughs That Work Well for HMOs in 2026

Lewisham

Average house price around £425,000. Good Victorian terraced stock that converts well. Strong transport links via Overground and DLR. High demand from young professionals priced out of neighbouring Southwark and Greenwich.

The catch: Lewisham has a borough-wide Article 4 Direction, so you need planning permission. But the council approves a reasonable proportion of applications, and the lower entry price means yields still hold up at 7–8% gross on a well-designed six-bed.

Croydon

One of the cheapest entry points in London. Average house prices around £380,000–£420,000. Plenty of large terraced and semi-detached houses that suit conversion. East Croydon station gives 15-minute access to Victoria and London Bridge.

Croydon has borough-wide Article 4 and a high refusal rate (65% in recent data). You need a strong application. But for investors who get planning right, the combination of low purchase price and solid room rents (£700–£900) makes the numbers work.

Greenwich

Average house price around £400,000–£440,000. The borough has the highest standard buy-to-let yield in London at 4.4%, and HMO yields push that considerably further. Woolwich and Plumstead offer good-sized Victorian stock at prices below the borough average.

Borough-wide Article 4 applies. Licensing fees are mid-range. Crossrail connections via Woolwich have boosted tenant demand significantly.

Barking & Dagenham

The cheapest borough in London for property. Average prices around £310,000–£350,000. Room rents are lower than inner London (£600–£800), but the entry price is so low that yields can exceed 8–9% gross.

Borough-wide Article 4 is in place. The council is active on licensing enforcement. But for investors targeting pure yield over capital growth, this is one of the strongest options in London.

Lambeth (Brixton, Streatham)

Lambeth is a mixed picture. Parts of Streatham now have Article 4 coverage (since August 2025), but much of the borough remains unrestricted. Average house prices vary hugely — from £400,000 in Streatham to £700,000+ in Clapham.

HMO conversions in Brixton and Streatham can push 7.5–9% gross on the right Victorian stock, according to recent broker data. Tenant demand is strong. The key is targeting streets that sit outside the Article 4 wards.

Article 4-Free Boroughs: Easier Entry, Higher Prices

A handful of London boroughs still have no Article 4 Direction for HMOs. That means you can convert a C3 dwelling to a small C4 HMO under permitted development. No planning application. No refusal risk. Just licensing.

As of mid-2026, these include Camden, Hackney, Islington, Wandsworth, Westminster, Kensington & Chelsea, and Hammersmith & Fulham. But there’s a reason they’re Article 4-free: most of them are expensive.

Wandsworth has an average house price of £660,000. Camden is higher. Westminster and Kensington are out of reach for most HMO investors. The regulatory ease is offset by entry prices that compress yields.

Hackney is the interesting exception. Average prices are still high (£550,000–£600,000), but room rents in Zones 2–3 can hit £1,000–£1,200 per room for well-finished HMOs targeting young professionals. No Article 4, no planning application needed. If you can find the right property at the right price, the numbers can work.

Boroughs to Be Careful With

Waltham Forest. Borough-wide Article 4, and the council refuses 75% of HMO applications. One of the toughest boroughs in London for planning approval.

Brent. 61% refusal rate. Licence fees run at £1,140 base plus £60 per room. Heavy enforcement. The maths can work here, but expect a harder ride through planning.

Newham. Active enforcement, borough-wide Article 4 since 2013, and one of the most extensive licensing regimes in London. Newham issues more penalties to landlords than almost any other borough. If you’re not on top of compliance, this is the wrong place to invest.

The Map Is Shifting Article 4 coverage is expanding fast. Hillingdon went borough-wide in December 2025. Sutton in February 2025. Merton completed its coverage in March 2026. Hammersmith & Fulham and Harrow have both signalled that borough-wide directions may follow. Always verify the current status for your specific address before committing to a purchase.

How We Can Help

At hmoconversionbuilders, we work across London’s boroughs. We know which ones approve applications and which ones don’t. We know what each council’s planning officers look for, and what their licensing inspectors expect.

Before you buy, we’ll check the Article 4 status, concentration levels, local policy, and whether the property actually works as an HMO. If it does, we handle the planning, the build, and the licensing.

Get in touch for a free, no-obligation consultation.

Disclaimer: This article is for general informational purposes only and does not constitute investment or planning advice. Property prices, yields, Article 4 status, and licensing regimes change. Always verify the current position with the relevant local authority before making investment decisions.