Inside a R 4.2m Cape Dutch restoration in Tulbagh

The 1969 Tulbagh earthquake nearly destroyed Church Street. Of the 32 Cape Dutch buildings on the strip, 26 were declared total losses; only six survived structurally. The restoration that followed — coordinated by Gawie Fagan and a small army of artisans — is now considered the most ambitious single heritage project undertaken in South Africa.

Number 18 wasn't part of it. Its gable had survived the quake. Its thatch had not. By the time Suzanne and Pieter van der Walt bought the property in 2022, the home had been re-roofed five times, in four different materials, by four different generations of well-meaning owners.

"There were Marley tiles on the back kitchen, IBR on the stoep, original thatch on the loft and two layers of corrugated iron on the lean-to," Suzanne says, walking the now-restored building. "We pulled it all off and started again."

The brief

Restore the home to the 1820s footprint, with the original Cape Dutch silhouette: H-plan, central gable, holbol gable end walls, thatched roof, shuttered casements. Modernise the interior to live like a contemporary three-bedroom family home — open kitchen, single bathroom per bedroom, underfloor heating, off-grid solar.

Budget: R 3.5 million. Final cost: R 4.2 million.

Phase 1 — the paperwork (9 months)

Tulbagh's Church Street is a National Heritage Site. Any work — including paint — requires SAHRA approval through the Western Cape Heritage Resources Authority (Heritage Western Cape). The Van der Walts engaged Sarah Wessels, a Stellenbosch-based heritage architect specialising in Cape Dutch, who shepherded the application through nine months and three rounds of revisions.

The sticking points:

• The proposed dormer windows on the rear elevation were rejected (not in keeping)
• The skylight over the new kitchen was approved (sufficiently invisible from street)
• The original holbol gable repair was approved as-is, no rebuild
• The eaves overhang on the south wing had to be returned to original dimensions

Heritage cost: R 220 000 (architect + heritage application + environmental).

Phase 2 — the foundations (4 months)

Cape Dutch homes were built on clay sub-floors directly on the ground. Damp had risen 1.2m up the walls. The remediation:

• Excavate the perimeter to 600mm below original floor level
• Install a new concrete ring beam with DPC membrane
• Sub-floor: limecrete with embedded UFH pipes
• Internal walls: re-pointed in lime mortar (not cement)
• New skirting: timber wainscot, original style

Foundation works: R 480 000.

Phase 3 — the thatch (5 months)

Thatching was the heart of the restoration. The Van der Walts engaged Eugene Erasmus of Cape Thatch, who completed the new roof in 5 months with a team of 4. The spec:

• Cape thatching reed (Phragmites australis) from the Riviersonderend
• Hand-cut to original 380mm depth
• Wired to the substructure with copper wire
• Tarred timber under-batten
• 30-year warranty (against weather, not against fire)

Thatch costs were R 1 850 / m² for the 220 m² roof — R 407 000 all in. By comparison, equivalent IBR would have been R 95 000. The Van der Walts considered the thatch a non-negotiable.

Phase 4 — the walls

Original Cape Dutch walls were 600mm thick rammed earth and rubble. Heritage Western Cape required that any new openings preserve the original wall thickness — which meant the new kitchen window in the south wall was framed in a 600mm-deep timber reveal.

Lime plaster, not cement, was specified for all wall finishes. The plaster was tinted with locally-sourced ochre to match the original tone the heritage architect had identified on a 1923 photograph.

Wall remediation, plaster and paint: R 380 000.

Phase 5 — the interior

The interior is where the budget was made up — and where the Van der Walts had the most fun. The brief was "feel like 1820, function like 2026":

• Original yellowwood beams retained, sandblasted, re-stained
• New oak floors throughout, fumed to 'antique' tone (R 180 000)
• Custom joinery: kitchen, three bathrooms, study, all in Burmese teak
• Sanitaryware: Lefroy Brooks, period reproduction
• Lighting: bespoke wrought-iron pendants from a Stellenbosch foundry

Interior fit-out: R 1.6 million.

Phase 6 — sustainability

The Van der Walts wanted the home off-grid for electricity and water:

• 9.6 kW solar array on the north slope of the thatch (hidden from street)
• 15 kWh battery bank in a converted outbuilding
• 22 500 L rainwater harvesting tanks (concealed behind the gable wall)
• Grey-water recirculation to gardens

The PV array required separate SAHRA approval, which took 4 months. The compromise: panels mounted flush to the thatch slope, with a recessed inverter housing.

Off-grid system: R 410 000.

The maths

That's a final rate of R 22 100 / m² for the 190 m² home — about 1.7× the Western Cape median for new build. Heritage restoration always runs at that premium.

The lesson

"If we knew the timeline going in, we wouldn't have done it," Pieter admits. "Three years from offer to occupation. But the home is the only one of its kind. You can't get this anywhere else."

The Van der Walts moved in in March 2026. They have not turned on the geyser yet — the off-grid system has carried the home through autumn without dipping below 60% battery state.

The next project: the outbuilding. "But not for two years," says Suzanne. "We're going to live in this one first."