The 'Colony Condo' Add-A-Floor Expansion Kit | Birds Choice Coates Original 4-Room Aluminum Martin House Addition

The Experience

For the dedicated Purple Martin landlord, colony growth isn't a question of if — it's a question of when. The Colony Condo Add-A-Floor Expansion Kit is the purpose-built answer, delivering a complete, hardware-inclusive floor addition that integrates seamlessly with any existing Coates Original purple martin house. Four new nesting rooms, factory-matched aluminum and stainless steel construction, and every component needed for a clean installation — this is how a serious landlord scales a colony program without starting over. Available in standard round entrance hole configuration or starling-resistant crescent entrance hole configuration to match your existing house.

Scientific Engineering

• Direct Coates Original Compatibility: Engineered specifically for integration with the Coates Original purple martin house series — remove the roof and ceiling plate, add the floor, reattach. No modification, no improvisation.
• 4-Room Aluminum Construction: Four additional nesting compartments in factory-matched aluminum, maintaining thermal performance and structural consistency with the existing house across all seasonal conditions.
• Porch Dividers Included: Integrated porch dividers prevent male porch domination on the new floor, supporting stable multi-pair occupancy from first-season occupation.
• Guard Rails Included: Perimeter rails on the new floor protect fledglings during the critical pre-fledge window — the same protection standard as the base house.
• Complete Hardware Packet: Every rail clip, screw, and nut required for assembly is included — no supplemental hardware purchases necessary.
• Entrance Hole Options: Available in round (standard Coates Original configuration) or crescent profile (starling-resistant entrance hole / SREH configuration) — select the style that matches your existing house.
• Stainless Steel Hardware: All fasteners are stainless steel, ensuring long-term structural integrity through freeze-thaw cycles and sustained outdoor exposure.

Boutique & Conservation Values

• Scalable Colony Investment: Rather than replacing a functioning house to increase capacity, the Add-A-Floor kit allows the landlord to grow the colony incrementally — protecting the established site familiarity that returning Purple Martins depend on year after year.
• Heritage Manufacturing: Proudly Made in the USA.

Kit Contents

• 1 Floor Panel
• 1 A Divider
• 1 B Divider
• 2 Side Panels
• 2 Doors (round or crescent entrance holes — per variant selected)
• 2 Porch Dividers
• 2 Side Rails
• 2 Front Rails
• 4 Door Plugs (included with round entrance hole variant only)
• 1 Hardware Packet (rail clips, screws, nuts)

Specifications

• Rooms Added: 4
• Floors Added: 1
• Entrance Hole Style: Round (standard) or Crescent / SREH (starling-resistant) — select variant
• Compatible With: Coates Original Purple Martin House Series (sold separately)
• Material: Aluminum, Stainless Steel
• Mount Type: Pole
• Estimated Shipping Weight: 4 lbs.
• Country of Origin: Proudly Made in the USA
• ⚠️ Assembly Required