Builder Quote Calculator

Estimate costs for building work including extensions, conversions, structural alterations, and general construction.

Average rates:$50-$100/hr |$400-$800/day

Job Type

Size / Quantity

sqm

Complexity

SimpleAverageComplex

Accounts for difficulty, access issues, and quality requirements

Include Materials

Toggle off if customer supplies materials

Estimated Quote

Single Story Extension

Estimated Price Range

$47,550 - $64,380

Mid estimate: $55,170

Estimated Time
47.5 days

Cost Breakdown

Labor$27,030 - $38,160
Materials$20,520 - $26,220
Labor
Materials

Estimate Only

This is a rough guide based on typical UK prices. Actual quotes may vary based on your location, job complexity, access, and current material costs. Always get quotes from multiple tradespeople.

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Building project costs vary significantly based on scope, structural requirements, and specification. Always get multiple quotes and ensure your builder has appropriate insurance.

Factors That Affect Builder Prices

  • Structural work — Steel beams, foundations, and engineering add significant cost
  • Permits and inspections — Fees and potential design changes affect budget
  • Specification level — Basic vs high-end finishes dramatically affect total cost
  • Site access — Difficult access increases labor and delivery costs
  • Ground conditions — Soil type may require deeper or stronger foundations

Builder Price Guide

Single Story Extension From $25,000
Loft/Attic Conversion From $35,000
Garage Conversion From $15,000
Internal Wall Removal From $1,500
New Interior Wall From $800
Patio/Deck Installation From $1,000
Driveway Installation From $2,000
Fence Installation From $400
Basement Finishing From $15,000
Kitchen Extension From $35,000

Frequently Asked Questions