What Renting a Garage Actually Costs Per Month: 2026 UK Insurance, Repairs and Voids

The headline yield on a garage assumes you collect rent every month, with no operating costs, in perpetuity. None of that is true.

What follows is the honest cost breakdown for letting a UK garage in 2026 — the numbers we use ourselves, drawn from operating a portfolio rather than from a brochure.

Insurance

A standalone garage insurance policy in 2026 typically costs £80-150 per year per unit. That covers £1-2m of public liability (essential — see what happens if a tenant injures themselves on your premises), basic damage from fire, storm, theft, and malicious damage, and replacement of a stolen door.

If you have a block of garages, block cover via a single policy can bring the per-unit cost down to £50-90.

You do not insure the tenant contents — that is their problem, and your tenancy agreement should make this clear.

For a garage letting at £100/month, insurance is around 1 month rent per year, or 8% of gross income.

Routine repairs

The big-three line items, in order of frequency:

• Door issues. The up-and-over door is the single most common repair. Springs go, locks fail, panels dent. Budget £120-180 per year for routine door maintenance, plus a full door replacement every 12-18 years at £700-900 fitted.
• Roof. A felted flat roof needs patch repairs every 3-5 years at £100-300, and a full re-felt every 15-25 years at £400-700.
• Floor and walls. Generally low-cost. Concrete floor repairs are rare; wall pointing on older brick blocks every 20-30 years.

A reasonable annual repair budget for a single garage is £150-250, building to a higher number in older or poorly-maintained units. We model £150/year as a base case for a sound mid-aged garage.

For a £100/month garage, that is another 1.25 months of rent.

Voids

The trap most new investors fall into. Garages turn over more often than houses — typical tenant tenure is 2-3 years, with a 3-8 week gap between tenants. Demand is also seasonal: most garage tenants are local, taking units for storage during a household project or for vehicle storage. Demand peaks in spring and autumn; February and August are slow.

Realistic void modelling for a UK garage in a moderately well-located area is 5-10% of the annual rent. That is 3-5 weeks vacant per year, on average, smoothed across long tenure and short turnovers.

For a £100/month garage at 7% void, that is £84/year of lost rent.

Management costs

Most garage investors self-manage. The decision is:

• Self-manage: zero financial cost, 1-2 hours per garage per year on average. Tenant inquiries, occasional access requests, an annual rent review.
• Letting agent: 8-12% of rent for find-only, 10-15% for full management. For garages, this rarely makes sense — agent overheads are calibrated for residential, not £1,200-a-year garage rentals. The economics break.
• Service company: a few specialist garage management companies operate in the UK, charging 10-15% of gross rent. Useful for portfolios over 20 units; uneconomic for small portfolios.

For a self-managed portfolio of 5-10 garages, management cost is your time. We value that time at zero in the cash flow model — but it is not zero, and at scale you will want to think about it honestly.

What this means for the headline

A £100/month garage produces:

• Gross rent: £1,200/year
• Insurance: −£100
• Repairs: −£150
• Voids (7%): −£84
• Net rent: £866/year (£72/month)

So a "12% gross yield" garage at £20,000 actually delivers around 4.3% net before tax, and roughly 7.2% net at a £12,000 entry price.

This is why the Maximum Bid Calculator targets a net yield, not gross. If you are underwriting on gross yields and ignoring the costs above, you are systematically overpaying.

What you can control

Insurance is largely fixed — shop around once a year, but do not expect to halve it. Voids and repairs, you can influence.

• Voids: location matters more than anything else. Garages in tight residential areas with limited parking let fastest. Garages on edge-of-estate sites with abundant nearby parking let slowest.
• Repairs: the door and roof are the two big-ticket items. A garage you bought with a 20-year-old door will need replacement within five years. Build that into the bid.
• Tenant churn: a good tenant is worth keeping. A small annual rent increase (CPI + 1%) is usually accepted; a sudden 20% rise typically is not. The 30%-rent-rise article covers this in detail.

The honest summary

The headline yield on a UK garage is interesting. The net cash flow after honest cost accounting is what you actually live with. The gap between the two is where new investors lose money — not catastrophically, but year after year, until they realise the deal they thought returned 12% has been returning 5%.

Run the 5-Year Cash Flow Projection on every deal before you bid. The numbers do not lie; the brochure does.

This article reflects 2026 UK costs and our operating experience. Specific costs vary by region, garage condition, and tenant profile.