Johannesburger investors eye office build as power cuts and mayoral race reshape demand

Mo. Basuony

Published: March 1, 2026 8:57 PM ET

Johannesburger investors eye office build as power cuts and mayoral race reshape demand

The johannesburger office market has resurfaced on Canadian investors’ radars after a new “future‑forward” precinct drew developers and occupiers, even as City Power warns of a wave of planned outages across February and March that could affect leasing and operations. The mayoral race between Helen Zille and Herman Mashaba and South Africa budget 2026 are now central to demand, rents and valuations.

Johannesburger office build signals fresh capital and new design priorities

This week’s future‑forward office project — built around green design, flexible floorplates and tech‑ready spaces — is being taken as a sign that new supply is again financeable in prime nodes and has shifted market sentiment. For the johannesburger market the project highlights themes occupiers want: resilience, flexible layouts and low‑carbon design, and it arrived as investors weigh timing and quality selection for CAD returns.

Power maintenance hits neighborhoods across February and March

City Power has warned residents to brace for multiple planned power interruptions across February and March as the utility rolls out maintenance at multiple substations. Alexandra experienced an interruption on Wednesday, 25 February, from 9am to 5pm that affected West Bank, Far East Bank extensions 9 and 10, and parts of Lombardy East. On Thursday, 26 February, Lunar Substation was taken offline during the same hours, affecting Univille, Lawley, Finetown, Mountain View, Ennerdale Ext. 8 and Lenasia South.

Early March switching‑station work and Siermert maintenance

Maintenance at Siermert Substation on Sunday, 1 March will affect Berea, Troyeville, Jeppestown, Fairview, Highlands, Doornfontein, New Doornfontein and the Johannesburg CBD. Additional outages are scheduled in early March at the Commercial Switching Station and Star Point Switching Station, while Riviera, Mondeor, Meredale, Naturena, Kibler Park and Alan Manor are earmarked for interruptions later in the month.

Mondeor Substation outage set for March 8

If you are supplied by Mondeor Substation, brace for a planned power interruption scheduled for March 8 from 08: 00 to 16: 00. Affected areas listed for the Mondeor work include Alan Manor, Kibler Park, Naturena, Meredale, Meredale Ext 2, 4, 9 and 26, Mondeor, Mondeor Ext: 3, 4 and 5, Ridgeway Ext 3, 4, 5 and 8 and Winchester Hills Ext 1, 2 and 3. City Power said the interruption is necessary to carry out essential maintenance work on its network as part of its programme of continually striving to provide better services, and warned that supply may be restored at any time so customers should treat supply points as live.

Grid constraints, backlogs and the effect on leasing

City Power has described the electricity system as “constrained” and urged residents to reduce consumption to prevent further strain and unplanned blackouts. City Power spokesperson Isaac Mangena said, “It is worth noting that there are currently no widespread outages on a daily basis, but our technical teams respond to outages as and when they are logged by customers. ” The City of Johannesburg’s Infrastructure Plan 1. 0 (2024/25) records a R44. 25‑billion asset renewal backlog; large portions of the core network, including underground cables, substations and transformers, are between 60 and nearly 100 years old.

Equipment risk and repeated interruptions

Across 269 substations much equipment has exceeded its intended lifespan. Of 216 power transformers, about 20% are classified as high risk due to age and insulation deterioration, and about 10% of 717 feeder boards require replacement. Mangena said ongoing outages are caused by a combination of ageing infrastructure, network overloading, vandalism, cable theft and illegal electricity connections, and that repeated interruptions in the same areas are often linked to sustained pressure from high demand and dense illegal connections.

What investors and tenants should expect next

Leasing in the Johannesburg office market tracks basic city performance: reliable power, water and mobility keep businesses open and staff productive, and those outcomes rest on municipal capacity and leadership. With the mayoral race between Helen Zille and Herman Mashaba and the South Africa budget 2026 set to shape funding for cities, portfolio risk now depends on how quickly service backlogs are cleared and permits flow. Stronger delivery can lift Grade‑A take‑up and lower incentives; weak delivery can widen vacancies and pressure net effective rents. South African borrowing costs and rand swings will shape entry prices and exit IRRs when translated to CAD: higher domestic rates often widen cap rates, while a stronger rand boosts CAD returns and a weaker rand can offset income gains. Investors are advised to decide early on hedging, target low‑vacancy assets and stress test cash flows for 300 to 500 basis points of currency and rate shocks. Canadians can access Johannesburg real estate through global brokers with South African listings, diversified EM or frontier market funds with a South Africa sleeve, or private partnerships focused on core nodes, but should check mandate limits, liquidity and fees.

Next confirmed events on the schedule include the Siermert Substation maintenance on 1 March and the Mondeor Substation interruption on March 8 from 08: 00 to 16: 00; City Power’s mid‑March plan also lists work at Hursthill Substation, Noordwyk Switching Station, Unisa Switching Station and First Avenue Switching Station in Roodepoort North as part of its maintenance programme. For questions about the March 8 interruption, customers can contact City Power’s call centre on 011 490 7484 or the toll‑free number 0800 202 925.