GDB Cost Calculator
Calculate Your Project Cost
Enter your project details below to get a cost estimate:
1. Project Type:
Extension
Loft Conversion
Renovation
Internal Remodeling
New Build
Extension Details
Extension Type:
Select type...
Single storey rear extension
Single storey side extension
Single storey wrap around extension
Two storey rear extension
Two storey side extension
Two storey wrap around extension
Size (sqm):
Remove walls for open plan?
Yes
No
Door Type:
Select type...
French doors
Bifold/sliding doors
Slim frame doors
Loft Conversion Details
Loft Type:
Select type...
Roof lights/Velux only
Full dormer loft conversion
L shape dormer (half back)
L shape dormer (full back)
Mansard loft conversion
Size (sqm):
Renovation Details
Renovation Type:
Select type...
Cosmetic only
Moderate including kitchens & bathrooms
Full gut renovation
Property Size:
Select size...
Flat
1–2 bed house
3–4 bed house
Larger
Additional Features
Kitchen:
No new kitchen
Small kitchen
Medium kitchen
Large kitchen with island
Bathrooms:
None
1 bathroom
2 bathrooms
Skylights:
None
1 skylight
2+ skylights
Nice-to-haves:
Extra skylights
Premium sliding doors
Underfloor heating
Smart lighting
Calculate Cost
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