Data centre development in Cape Town: power grid constraints, planning approvals and subsea infrastructure

Overview of Cape Town Data Centre Infrastructure

Cape Town has emerged as a key digital infrastructure hub in Sub-Saharan Africa, serving as a strategic landing point for international submarine cables and a gateway to Southern Africa. Developers and institutional investors evaluating hyperscale or colocation facilities in the municipality face specific constraints regarding power availability, municipal zoning, water use, and environmental regulation.

Unlike standard logistics or light industrial developments, data centres require high power density, continuous uptime, and substantial backup generation. In South Africa, no standalone national law or municipal by-law specifically governs data centre development. Approvals are granted through established land use, environmental, and municipal electricity frameworks.

Grid Capacity, Power Providers and Connection Timelines

Data centre power in Cape Town is supplied by either the City of Cape Town Electricity Services Department or directly by national power utility Eskom, depending on the boundary of the supply area and the voltage level required.

High-density facilities require power allocations ranging from 10 MW for regional edge sites to upwards of 170 MW for multi-building hyperscale campuses, such as the approved Equinix development in King Air Industria. Securing bulk supply allocations presents significant operational hurdles. Eskom and the City of Cape Town require developers to submit formal Notified Maximum Demand (NMD) applications.

For allocations exceeding 10 MW, the realistic lead time to secure firm grid capacity is between 24 and 60 months. This timeline accounts for:

1. Deep grid impact studies by Eskom or municipal engineers to assess sub-station transformer headroom. 2. Infrastructure upgrades, including the construction of dedicated high-voltage (132 kV or 66 kV) switching substations. 3. The procurement and installation of heavy electrical infrastructure, subject to public procurement rules and global equipment supply chain delays.

Developers frequently construct facilities on a phased basis or deploy temporary self-generation solutions to align operational dates with grid delivery timelines.

Industrial Electricity Costs and Tariff Structures

Electricity for large industrial users in Cape Town is billed on Time of Use (TOU) tariffs. For the 2026/27 municipal financial year (effective 1 July 2026), industrial electricity rates are determined by the City of Cape Town and reviewed by the National Energy Regulator of South Africa (NERSA).

Industrial power tariffs consist of three distinct cost components:

• Active Energy Charge (c/kWh): Variable rates split into Peak, Standard, and Off-Peak periods during High Season (June to August) and Low Season (September to May). Off-peak energy charges hover between R1.20 and R1.80 per kWh (excluding VAT), while high-season peak energy charges exceed R3.70 per kWh.
• Demand Charge (R/kVA): A monthly fee assessed on the maximum active/reactive power demand registered during billing cycles.
• Service and Network Capacity Charges: Fixed monthly administrative and connection fees based on the notified capacity reserved on the grid.

Because electricity costs represent the largest ongoing operational expenditure for data centre operators, long-term power purchase agreements (PPAs) with independent power producers (IPPs) via municipal or national electricity wheeling frameworks are increasingly used to lock in renewable power tariffs.

Subsea Fibre Cable Landings and Connectivity Routes

Cape Town's primary advantage for cloud service providers and enterprise hosts is its direct access to high-capacity international subsea optic fibre systems. The local market relies on four primary subsea cable systems landed north of the city:

• Melkbosstrand Cable Landing Station: Located approximately 35 km north of Cape Town, operated by Openserve (Telkom SOC Ltd). Houses the South Atlantic Telecommunications cable no.3 / West Africa Cable System (SAT-3/WASC) and Google's Equiano subsea cable (144 Tbps design capacity).
• Yzerfontein Cable Landing Station: Situated further north along the Western Cape coast. Serves as a landing point for the West Africa Cable System (WACS), owned by an international consortium including MTN, Vodacom, and Telkom.
• Duynefontein Landing Site: Serves as a Western Cape landing point for the 2Africa subsea cable (45,000 km, up to 180 Tbps capacity), managed by Meta and telecommunications partners.

Dark fibre terrestrial backhaul routes connect these landing stations directly to key industrial hubs near Cape Town International Airport, Parow Industria, Richmond Park, and the Cape Town Central Business District (CBD).

Permit Requirements, Zoning and Environmental Approvals

Developing a data centre in Cape Town requires navigating land registration, municipal planning, and environmental compliance.

1. Land Registration and Title Verification

All land parcels (*erven*) in Cape Town are registered in the Cape Town Deeds Office, an office of the Department of Agriculture, Land Reform and Rural Development. Title deeds must be checked for restrictive conditions, servitudes, or historical encumbrances under the Deeds Registries Act 47 of 1937.

2. Zoning and Municipal Planning

Data centres fall under Industrial or General Business zoning classifications in the City of Cape Town Development Management Scheme (DMS). If a site is zoned agricultural or light industrial with height and coverage restrictions, developers must apply to the City of Cape Town Land Use Management Department for rezoning or consent use. Applications are heard by the Municipal Planning Tribunal (MPT). Once rezoning is granted, developers must submit a Site Development Plan (SDP) and formal building plans for structural, civil, and fire safety approval.

3. Environmental Authorisation

Data centre projects trigger listed activities under the National Environmental Management Act 107 of 1998 (NEMA) Environmental Impact Assessment (EIA) Regulations. An Environmental Authorisation (EA) from the Western Cape Department of Environmental Affairs and Development Planning (DEADP) is required if the facility:

• Stores large volumes of hazardous substances (specifically fuel for backup diesel generators exceeding 80 cubic metres or 80,000 litres).
• Requires bulk clearing of native vegetation over designated threshold areas.

4. Water and Cooling Compliance

Given Cape Town's history of water scarcity, municipal planning authorities and civil society groups closely evaluate facility cooling designs. Facilities relying on evaporative open-loop cooling systems face heightened scrutiny or refusal. Operators are increasingly required to adopt air-cooled systems, closed-loop chilling loops, or non-potable water supply agreements with municipal treatment facilities.

Operational and Pipeline Data Centre Projects

Several local and international hyperscale and colocation operators maintain active sites or planned projects across the Cape Town metropolitan area:

• Teraco Data Environments (Digital Realty): Operates major carrier-neutral campuses, including CT1 and CT2 in Brackenfell and Isando connectivity corridors.
• Africa Data Centres (Cassava Technologies): Operates the CPT1 facility in Diep River, which has undergone multi-megawatt expansion approvals.
• Vantage Data Centers: Operates hyperscale capacity servicing multinational cloud clients in the Western Cape.
• Equinix: Secured land rezoning approval via the Municipal Planning Tribunal in 2026 for a multi-building 174 MW campus at King Air Industria near Cape Town International Airport.
• Dimension Data / NTT Data: Operates enterprise-grade colocation and managed cloud sites across Cape Town industrial zones.