Property Location: 42 Wentworth Road, Vaucluse NSW 2030 · Coordinates: 33.8615S, 151.2785E
Moderate overland flood risk (35/100) drives a projected $1.17M climate discount by 2050, but 35m elevation eliminates coastal inundation risk entirely.
Coastal flood risk assessment — IPCC AR6 projections
Elevation ASL
Estimated
Distance to Coast
Very close
Current Risk
Storm Surge + SLR
by 2100 (RCP 8.5)
At 35m AHD elevation, this property is well above all projected sea-level rise and storm surge scenarios through 2100. The combined worst-case inundation height (sea-level rise + storm surge) of 2.04m by 2100 under SSP5-8.5 leaves a safety margin of over 32m.
2050
+0.26 m
2100
+0.84 m
42 Wentworth Road sits at 35m above sea level, approximately 1.8km from the Sydney Harbour coastline. While classified as a coastal suburb, the property's substantial elevation provides exceptional natural protection from sea-level rise. CSIRO projects 0.26m rise by 2050 and 0.84m by 2100 under SSP5-8.5. Even combined with a 1.2m storm surge event, the property maintains a safety margin exceeding 30m. Coastal erosion is not a concern at this distance and elevation.
Elevation sourced from OpenTopoData (SRTM30m / ASTER30m). Distance to coast uses an estimated Australian coastline model — verify with a licensed surveyor for precision site assessments. Sea-level rise projections are IPCC AR6 best estimates; actual outcomes may vary.
42 Wentworth Road sits at 35m elevation within the Rose Bay Catchment (Woollahra Council). No formal flood overlay applies to this lot, but the surrounding catchment has experienced localised street flooding during extreme rainfall. The property's elevated position on Wentworth Road provides meaningful protection from riverine and tidal flooding, though overland flow during intense storms remains a moderate concern.
Vaucluse is a densely built-up residential suburb with no bushfire-prone land designation under the NSW Rural Fire Service mapping. The nearest significant bushland (Nielsen Park and Vaucluse House grounds) is managed parkland with minimal fire risk. Urban density provides effective firebreak protection. BAL rating: N/A (not bushfire-prone land).
Vaucluse experiences moderate urban heat island effects, partially mitigated by coastal proximity and harbour breezes. The Eastern City District recorded only 6 hot days above 35C during summer 2018-19 (Greater Sydney Commission). However, CSIRO projections under RCP 8.5 indicate average summer maximums will increase 1.5-2.0C by 2050. The property's harbour-facing aspect and established garden provide natural cooling advantages.
At 35m AHD elevation and 1.8km from the coastline, 42 Wentworth Road is well above all projected sea-level rise and storm surge scenarios through 2100. CSIRO projects 0.26m sea-level rise by 2050 and 0.84m by 2100 under SSP5-8.5. Combined storm surge risk is estimated at 1.2m. The property's 35m elevation provides a margin of safety exceeding 30m above worst-case scenarios.
East Coast Low produced 150mm+ rainfall in 24 hours. Localised street flooding in Rose Bay Catchment. No direct property inundation at this elevation.
Intense summer rainfall caused localised flooding on Old South Head Road and low-lying sections of Rose Bay.
Major Sydney storm event. Woollahra LGA recorded significant stormwater overflow in multiple catchments.
Severe thunderstorm with intense localised rainfall caused minor flooding in Vaucluse and Rose Bay areas.
| Year | Scenario | Risk Increase | Est. Depth Increase |
|---|---|---|---|
| 2030 | RCP 4.5 | +8% | N/A |
| 2030 | RCP 8.5 | +12% | N/A |
| 2050 | RCP 4.5 | +15% | N/A |
| 2050 | RCP 8.5 | +22% | N/A |
This property has strong mitigation potential. The elevated position (35m AHD) already provides natural flood protection. Targeted drainage improvements including improved sub-surface drainage, flood barriers at garage entry points, and upgraded guttering could reduce the overland flow risk by an estimated 40-60%. Installation of external shading, improved insulation, and ceiling fans would address heat exposure. Total estimated mitigation cost: $35,000-$65,000 with a projected 8-12 year payback through insurance premium reductions and energy savings.
The adaptation strategy for 42 Wentworth Road focuses on drainage improvements and heat reduction measures. Priority should be given to stormwater drainage upgrades and flood barriers, which together address the dominant overland flood risk. Solar installation provides excellent ROI in this high-irradiance location. Total investment of $61,000 is projected to reduce climate risk by 40-50% and generate $4,600/year in combined insurance and energy savings.
Install improved sub-surface drainage around the property perimeter to manage overland stormwater flow during extreme rainfall events. The Rose Bay Catchment flood study identifies overland flow as the primary flood mechanism for elevated properties in this area.
With a flood score of 35/100, overland flow during extreme rainfall is the dominant risk. The property's 604sqm lot and sloped terrain can channel stormwater towards the building. Upgraded drainage would reduce this risk by an estimated 25-35%.
Install removable flood barriers at garage entry and lower-level doorways to prevent water ingress during heavy rainfall. Suitable for the double/triple garage configuration.
The garage and lower-level entries are the most vulnerable points during overland flooding. Flood barriers provide immediate, deployable protection during storm events at relatively low cost.
Install external blinds or awnings on west-facing windows and upgrade to reflective roof coating to reduce heat absorption during summer months.
With a heat score of 42/100 and CSIRO projecting 1.5-2.0C warming by 2050, proactive heat reduction measures will improve liveability and reduce cooling costs. The property's harbour-facing aspect already provides natural advantage.
Install 10kW solar panel system on the tile roof to offset electricity costs and improve energy resilience. Satellite imagery confirms suitable roof orientation and minimal shading.
Vaucluse receives excellent solar irradiance. A 10kW system would generate approximately $2,800/year in electricity savings and add an estimated $50,000-$80,000 to resale value.
Replace ageing guttering with oversized capacity gutters and install leaf guards to maintain drainage capacity during heavy rainfall events.
Established gardens surrounding the property produce significant leaf litter which can block gutters during storms. Upgraded guttering ensures rainwater is properly directed away from the building.
Based on climate-adjusted discount rate applied to comparable sales. Not a formal valuation.
Estimated financial impact of implementing all recommended adaptations for 42 Wentworth Road, Vaucluse NSW 2030
These questions are tailored to your specific property analysis and buy live goals.
With a heat risk score of 42/100, what specific mitigation measures are in place or planned for 42 Wentworth Road, Vaucluse NSW 2030?
Insurance is projected to rise from $4,200/yr to $11,500/yr by 2050. What steps can reduce this trajectory?
Are there any pending or recent development applications nearby that could affect drainage or bushfire buffer zones?
What would be the total cost to bring this property to a climate-resilient standard?
Given the coastal risk rating of "Low", has a coastal erosion hazard study been conducted for this area?
Vaucluse is one of Sydney's most prestigious and stable residential suburbs. The area benefits from excellent schools (Vaucluse Public School, Rose Bay Secondary College catchment), harbour proximity, low crime rates, and strong community amenities. Property values have shown consistent growth with a median house price of $9.5M and 10.8% compound growth rate. The suburb's high socioeconomic profile (SEIFA decile 10) supports long-term community resilience.
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Our risk score combines the likelihood of a climate hazard occurring with the potential severity of its impact on the property. Scores range from 0 (no risk) to 100 (extreme risk). The overall assessment considers flood, bushfire, heat, and coastal erosion risks weighted by their relative impact on property value and safety.
This report integrates 15+ authoritative Australian data sources for comprehensive climate risk analysis
Historical climate records, weather warnings, and fire danger ratings
Temperature, rainfall, and sea level rise projections (RCP 4.5 / 8.5)
Census demographics, SEIFA socioeconomic indices, and economic data
Historical weather patterns, temperature trends, and precipitation records
Geocoding, satellite imagery, elevation, solar potential, and air quality data
NSW, QLD, and VIC flood and bushfire mapping with BAL ratings
Verified property attributes, sales history, and automated valuations
LGA-level safety metrics, crime trends, and social stability indicators
Data Currency: Climate projections use the latest available datasets from BOM and CSIRO. Some data may be updated periodically by source agencies. For critical decisions, we recommend verifying with original sources.
Last Updated: 13 March 2026
