Designing Dreams: The Mulgoa Home Project Case Study

Proposed Two-Storey Dwelling with Pool & Pool House

Complying Development Certificate (CDC)

Project Overview

The Mulgoa Residence is a carefully designed two-storey family home created for a generous 954.80m² site. Designed under a Complying Development Certificate (CDC), the project maximises allowable floor area while maintaining full compliance with height, setback, and landscape requirements.

The result is a substantial 503.83m² total build area residence that balances scale, privacy, and functionality — complete with alfresco entertaining, swimming pool, spa plunge, and detached pool house.

Snapshot

  • Site Area: 954.80m²

  • Land Zoning: RU5 / SP2

  • Total Build Area: 503.83m²

  • Total GFA (CDC): 388.24m² (Complies)

  • Ground Floor (GFA): 252.23m²

  • First Floor (GFA): 137.08m²

  • Pool House: 15.93m²

  • Landscaping Provided: 393.61m² (Complies)

  • Private Open Space: 24m²

  • Max Building Height: 8.5m (Complies)

The Brief

The client sought a spacious, contemporary two-storey home that would:

  • Maximise living space within CDC limits

  • Provide strong indoor–outdoor connection

  • Include a full-sized swimming pool and pool house

  • Deliver generous private open space

  • Maintain privacy from adjoining properties

  • Respond to solar orientation and prevailing breezes

The design needed to achieve maximum permissible GFA (25% lot area + 150m² allowance) while remaining fully compliant.

Site & Environmental Response

The site analysis identified:

  • Street noise and vehicle access from the front boundary

  • Potential privacy issues to adjoining properties

  • Prevailing summer and winter breezes

  • Solar movement (summer/winter solstice positioning)

The dwelling was positioned to exceed required setbacks, improving privacy and natural light access:

  • Front setback provided: 13.373m (exceeds requirement)

  • Rear setbacks (GF & FF): significantly exceed minimum controls

  • Side setbacks: exceed required 1.5m (GF) and 2.5m (FF)

Landscaping was strategically distributed between front and rear to exceed minimum requirements, achieving over 393m² of landscape area.

Design Strategy

The ground floor is designed as the primary family and entertaining zone, seamlessly connecting internal living spaces to the alfresco and pool area.

Ground Floor Highlights:

  • Open-plan kitchen, family, and dining

  • Covered alfresco (33m²)

  • Defined private open space (4m x 6m)

  • Direct access to 8.0m x 3.0m swimming pool

  • Integrated 1.5m x 1.5m spa / cold plunge

  • Detached pool house

  • Double garage with compliant driveway gradient


The first floor accommodates private family zones, maintaining separation between living and retreat spaces.

Architectural articulation at the front façade enhances depth while remaining within allowable articulation zone controls.

Sustainability & BASIX

The project was designed in accordance with BASIX and NCC requirements.

Water Efficiency

  • 4-star showerheads

  • 5-star toilets and taps

  • 5,000L rainwater tank connected to garden, toilets & laundry

  • 51,000L pool with cover

Thermal Performance

  • Insulated external walls (R2.06)

  • Ceiling insulation (R3.0)

  • Suspended timber floors with R3.5 bulk insulation

  • Double-glazed skylights

  • Sarking to roof

Energy

  • 6-star electric hot water system

  • LED lighting throughout

  • Ducted heating & cooling

  • Electric cooktop and oven

No solar panels were installed on this project.

Key Features

  • 503.83m² total build area

  • 388.24m² compliant GFA

  • Two-storey residence

  • 8m x 3m swimming pool (1.2m–1.8m depth)

  • Spa / cold plunge

  • Pool house

  • Covered alfresco entertaining

  • Private open space (24m² compliant)

  • Over 393m² landscaped area

  • Glass pool fencing to AS 1926.1

  • Termite protection system

  • Retaining walls under 1.0m

Outcome

The Mulgoa Residence successfully maximises allowable development potential under CDC controls while maintaining strong environmental performance and generous outdoor amenity.

By carefully balancing built form, setbacks, and landscaped space, the design delivers a large-scale family home that remains compliant, efficient, and thoughtfully resolved.

 

Thinking of Building on a Wide Lot?

If you're planning a custom home and want to maximise your site's full potential while remaining compliant, our team can guide you from concept through CDC approval.

Enquire with DMR Designs to begin your custom home journey.