GFK HomesGFK Homes
  • Get Quote
GFK HomesGFK Homes

Expandable granny flat solutions for rental yield and family living

WhatsAppEmail
Product
  • Models
  • Get Quote
  • FAQ
Resources
  • Blog
  • Compliance
  • Designs
  • Inspiration Gallery
  • Floor Plans
  • B2B Parks
  • Acreage Farmstay Planner
  • Farm Worker Housing
  • Mining Camps Planner
  • Property Developers Planner
  • Vineyard Wedding Planner
  • Cost Calculator
  • Portable Granny Flats
  • Policy Research
  • ROI Report
Company
  • About
  • Contact
  • How It Works
Legal
  • Cookie Policy
  • Privacy Policy
  • Terms of Service
© 2026 GFK Homes — Granny Flat Kits AU. Backed by LINKUP AI PropTech Group.
Premium expandable granny flat — Signature Two-Tone model, the base for all upgrade add-ons
Scope Upgrade Menu

Add-ons and Upgrade Bundles

Most projects include optional upgrades based on site constraints and intended use. Scope them early to avoid costly late changes.

Expandable granny flat with pitched gable roof and covered front verandah

Roof + Porch Upgrade

AUD 4,500 - 6,500

Improve weather protection and street-facing appearance with a stronger finished look.

Include in my quote
Premium warm oak exterior cladding panels for expandable granny flat

External Cladding Upgrade

AUD 2,500 - 4,000

Choose facade finishes that better match surrounding homes and local expectations.

Include in my quote
Off-grid solar power system for self-contained expandable granny flat

Off-grid Solar Package

AUD 5,500 - 8,000

Reduce operating exposure with battery-ready solar options for selected use cases.

Include in my quote
Interior of expandable granny flat with split-system air conditioning

Split System Air Conditioning

AUD 1,500 - 2,500

Pre-plan cooling and heating requirements to avoid retrofit costs after delivery.

Include in my quote
Standard bathroom with hot water heat pump system in expandable granny flat

Heat Pump Hot Water

AUD 2,000 - 3,000

A practical efficiency upgrade for long-term rental and family occupancy scenarios.

Include in my quote
Site infrastructure for septic and water tank installation

Septic + Water Tank Bundle

AUD 800 - 1,200

Support projects in lower-infrastructure sites where utility access is constrained.

Include in my quote

Not sure which add-ons to choose?

Share your site and use case. We will recommend a practical upgrade bundle first.

Get add-on recommendation