Two buildings can quote the same rental per square metre and deliver completely different net incomes, because the lease structure decides who carries rates, operating costs, insurance and maintenance. Understanding the spectrum from gross to triple-net is fundamental to comparing deals — and to valuing income streams correctly.

Gross leases

Under a gross lease the tenant pays a single all-in rental and the landlord carries operating costs, municipal rates and maintenance. Common in smaller office and retail lettings, gross leases are simple to administer but expose the landlord fully to cost inflation — particularly municipal charges, which have consistently grown faster than CPI. A gross rental must therefore be priced with headroom, and escalated realistically.

Net leases

The mid-market standard in SA is a net lease: the tenant pays base rental plus a pro-rata share of operating costs, and usually a rates contribution. The landlord typically retains structural maintenance and insurance. This is what most A- and B-grade office and industrial leases look like in practice, and it insulates the landlord from most cost inflation while keeping the tenant's obligations measurable.

Triple-net leases

In a triple-net structure the tenant carries effectively everything — rates, insurance, and all maintenance including structural. Triple-net leases dominate single-tenant industrial and standalone retail (fuel stations, national-brand warehouses), often on 5–10 year terms. For investors, triple-net income is the cleanest to capitalise: what you collect is close to what you keep, which is a large part of why industrial yields of 9–11% translate into genuinely superior net returns.

Comparing deals properly

Always reduce any offer to net effective income: base rental, minus non-recoverable costs, minus amortised tenant installation and rent-free concessions, adjusted for the escalation structure. A R150/sqm gross deal can net less than a R115/sqm triple-net deal on the same building. Valuers and financiers work off net income — landlords should negotiate off it too.

Stone Capital structures and negotiates commercial leases across all three formats, and models the net effective position on every deal before owners sign. Talk to our leasing desk →