Setting up a 5-bed HMO in a northern city costs approximately £28,000–£55,000 above the deposit for a light-to-medium refurbishment. This covers SDLT (5% BTL surcharge), legal and survey fees, mortgage arrangement, fire safety fit-out, kitchen/bathroom works, furnishing, HMO licence, and first-month running costs. The deposit itself is typically 25% of purchase price — so total cash required for a £270,000 property is £95,000–£120,000 in most scenarios. Every cost below is what most new HMO investors underestimate or forget entirely.
HMO startup cost estimator
Enter your property details to get an estimated total cash requirement from purchase to first tenant.
| Cost category | Low estimate | High estimate | Mid estimate |
|---|
—
Every cost — phase by phase
The costs below represent the full universe of HMO startup costs. Not every cost applies to every deal — an already-licensed property avoids conversion costs, and a self-managed property avoids agent setup fees. Use this as a complete reference to avoid surprises.
Three startup scenarios — total cash required
The total cash you need to set up an HMO varies enormously depending on the property's starting condition. Here are three realistic scenarios for a 5-bed HMO in a northern city, purchased at £265,000.
- Deposit: £66,250 (25%)
- SDLT + legal + fees: ~£12,500
- Minor refresh + re-licensing: ~£5,500
- First-month costs + reserve: ~£5,000
- Mortgage arrangement: ~£1,500
- Deposit: £66,250 (25%)
- SDLT + legal + fees: ~£12,500
- Fire safety + decoration + floors: ~£12,000
- Furnishing (5 rooms): ~£7,500
- Licence + EPC + certificates: ~£2,000
- First-month costs + reserve: ~£5,500
- Deposit: £66,250 (25%)
- SDLT + legal + fees: ~£12,500
- Full refurb + fire safety: ~£40,000
- Furnishing: ~£8,500
- Licence + compliance: ~£2,500
- Extended void + reserve: ~£8,000
The void period. From purchase to first rent received, you will pay the mortgage, bills, and insurance with no income. A 10-week void on a £265,000 property at 5% IO costs approximately £2,760 in mortgage payments alone — plus bills, insurance, and council tax during the conversion. Budget for 8–16 weeks from purchase to full occupancy.
The cash reserve. Once let, your HMO will generate unexpected costs — a boiler failure, a roof repair, a room void, appliance replacement. A minimum cash reserve of 2 months' gross rent (approximately £4,000–£6,000 for a typical 5-bed) is not optional — it is the difference between a resilient investment and a cash-flow crisis.
Furniture costs in full. Many investors budget per room for the bedroom but forget white goods, kitchen equipment, communal furniture, and window dressings. A properly furnished 5-bed HMO costs £6,000–£9,000 to equip properly — not the £3,000 that springs to mind when thinking "just beds and wardrobes."
Article 4 Directions — the planning cost most investors miss
In England, converting a standard dwelling (use class C3) to a small HMO (use class C4, 3–6 occupants) is normally permitted development — no planning permission required. But many councils in high-density student areas have introduced Article 4 Directions that remove this permitted development right, requiring full planning permission for the change of use.
Leeds: Hyde Park, Headingley, Burley, and Woodhouse. Buying any C3 property in these areas with the intention of converting to an HMO requires planning permission — which may be refused.
Nottingham: Citywide Article 4 Direction — applies across the entire city. No C3 to C4 conversion is permitted development in Nottingham.
Exeter, Oxford, Southampton, Portsmouth: Extensive Article 4 areas covering most student-adjacent areas. Always check before purchasing.
Impact: Planning applications cost ~£200 in fees plus professional preparation costs (£500–£2,000), take 8–13 weeks, and can be refused — potentially leaving you with a property you cannot convert as intended. Always check Article 4 status at the council planning portal before exchange.
Frequently asked questions
How much money do I need to start an HMO?
For a typical 5-bed HMO in a northern university city at £250,000–£280,000, budget for total cash of £95,000–£155,000 depending on the property's starting condition. The deposit (25%, typically £62,500–£70,000) is the single largest item. Above the deposit, allow £28,000–£85,000 for SDLT, legal fees, conversion and refurbishment works, fire safety fit-out, licensing, furnishing, first-month running costs, and a cash reserve.
The exact figure depends heavily on whether the property is already licensed (much lower setup cost), needs a light conversion, or requires substantial works. Use the estimator above for a property-specific figure.
What is stamp duty on an HMO purchase?
HMO purchases are treated as additional property purchases for SDLT purposes and attract the 5% BTL surcharge on top of standard residential SDLT rates. On a £265,000 property, total SDLT is £16,500 (£3,250 standard + £13,250 at 5% surcharge). Use our BTL stamp duty calculator for the exact figure on any purchase price.
Can startup costs be offset against tax?
It depends on the nature of each cost. Revenue expenses (licence fees, insurance, letting agent costs, management costs, repairs and maintenance) are deductible from rental income in the year incurred. Capital expenditure (improvement works that add to the property's value rather than simply maintaining it — e.g. adding a new bathroom where none existed) is not immediately deductible but may reduce Capital Gains Tax liability when you eventually sell. The distinction between repair (revenue, deductible) and improvement (capital, not immediately deductible) is a common source of confusion — speak to a specialist property tax accountant.
Do I need planning permission to convert to an HMO?
Converting a standard house (C3 use class) to a small HMO (C4, 3–6 occupants) is normally permitted development in England — no planning permission required. Converting to a large HMO (7+ occupants, sui generis use) always requires planning permission. However, Article 4 Directions in many university cities (Nottingham citywide, Leeds Headingley/Hyde Park, Exeter, Southampton, Oxford) remove the C3-to-C4 permitted development right, requiring full planning permission even for small conversions. Always check Article 4 status at the council's planning portal before purchasing.
Related guides and calculators
About the author
✓ Editorially reviewed — all Poqet guides are checked for factual accuracy before publication and updated when UK rates or legislation change. Editorial Policy