Clear Estimates
Start Free Trial
AI Scope Assistant included

Estimate Home Additions & ADUs With Confidence

Describe the addition and AI builds the full estimate — foundation through finish. 12,000+ line items with local pricing for 400+ U.S. markets.

No credit card required. Full access for 30 days.

Describe
AI
Estimate
Describe Your Project
Project Description

Generate Estimate →
AI Is Building Your Estimate
📊Searching 20+ years of project data...
Matching from 12,000+ parts library...
Applying your custom sizes & materials...
Adjusting for local pricing...
Building line-item breakdown...
Compiling ready-to-send estimate...
Estimate Ready
Foundation & Framing$42,000
Roofing & Exterior$18,500
Plumbing & Electrical$22,000
Kitchen & Bath$28,000
+ 4 more sections...
Total Estimate$148,200
Email to Client
Download PDF
Edit Estimate

Trusted by 50,000+ contractors — Featured in

Builder
Remodeling
Deck Builder
JLC
Custom Home
Cost vs. Value
50,000+
Contractors Trust Us
$25B+
In Total Bids Created
1,000,000+
Estimates Produced
20+
Years of Cost Data

Addition & ADU templates included

Complex, multi-phase projects with every trade covered — foundation through finish.

ADU — Above Garage, Economy

Detached garage with living space above, builder-grade finishes

ADU — Above Garage, Average

Garage ADU with standard finishes, mini-split, full kitchen & bath

ADU — Above Garage, Premium

Garage ADU with cedar shake roof, solid wood floors, premium kitchen

ADU — Above Garage, Luxury

Garage ADU with slate roof, custom cabinetry, granite countertops

ADU — Detached Guest House, Economy

Single-story slab-on-grade, vinyl siding, builder-grade finishes

ADU — Detached Guest House, Average

Detached ADU with fiber-cement siding, full kitchen and bath

ADU — Detached Guest House, Premium

Stucco exterior, solid wood floors, luxury kitchen and bath

ADU — Detached Guest House, Luxury

Brick veneer, custom cabinetry, granite & designer finishes throughout

Owner's Suite Addition, Average

Walk-in closet, tile shower, solid surface vanity, carpet floors

Owner's Suite Addition, Premium

Soaker tub + walk-in shower, stone counters, cherry floors, built-ins

1-Story Addition, Frame & Siding, Basement

Full 8-ft poured concrete unfinished basement, oak floors, HVAC tie-in

2-Story Addition, Frame & Siding, Basement

Two-story over poured basement, double the finished area per footprint

Bathroom Addition, Average

New bath over crawlspace: fiberglass tub/shower, ceramic tile, vanity

Bathroom Addition, Premium

Soaker tub + walk-in shower, imported tile, stone countertop, designer fixtures

Plus hundreds more — and you can create custom templates for any job you do repeatedly.

The most complete database for residential additions

Every phase covered — 12,000+ line items for foundation through finish, with local pricing for your market.

Addition & ADU Templates

Room additions, primary suite additions, ADUs, in-law suites, second stories, and garage conversions.

Comprehensive Scope

Foundation, framing, roofing, HVAC, electrical, plumbing, finishing — every phase covered.

12,000+ Line Items

The most detailed cost database for residential additions.

Local Pricing

Material and labor costs for 400+ U.S. markets.

Win Big Projects

Professional proposals for the high-value jobs that grow your business.

How addition estimating works

Complex projects don't have to mean complex estimating.

1

Select an addition template

Pick from room addition, ADU, second story, garage conversion, or primary suite — pre-loaded with every phase.

2

Build the full scope

Foundation through finish. Adjust each phase with local material and labor costs for your market.

3

Win the high-value job

Deliver a comprehensive proposal that shows clients you know every detail of the project.

Perfect for

Addition Contractors

Bid room additions, second stories, and primary suite additions with comprehensive, phase-by-phase estimates.

Custom Home Builders

Cover every trade from foundation through finish — framing, MEP, roofing, insulation, drywall, and interior finish.

ADU Specialists

Full ADU templates covering site work, foundation, framing, all trades, and interior finish — detached or attached.

What contractors are saying

4.7 out of 5

Based on 948 verified reviews across Google, Capterra, G2, and SourceForge

I was doing home additions for years with spreadsheets. Clear Estimates has every phase covered — foundation through finish. It saves me hours per bid.

Roberto V.

General Contractor

Clear Estimates has streamlined my workflow, reduced back-and-forth, and helped me present a more professional image.

Seth Z.

General Contractor

Using for 10+ years. The usability and ease made estimating enjoyable.

Tyler P.

General Contractor

Start estimating additions & ADUs in minutes.

30-Day Free Trial
$79/month

after free trial

  • No contract
  • No setup fees
  • Unlimited estimates
  • Unlimited support
  • Cancel anytime
Start Your Free 30-Day Trial →

Try everything free for 30 days. No credit card required.

Frequently asked questions

Room additions, primary suite additions, ADUs and in-law suites, second-story additions, garage conversions, sunrooms, basement additions, and new garage builds.

Yes. ADU templates include site work, foundation, framing, roofing, plumbing, electrical, HVAC, insulation, drywall, flooring, and all interior finishes — every phase covered.

Addition templates are organized by phase (foundation, framing, plumbing, electrical, etc.). Each phase has its own line items and labor costs, making it easy to review the total scope or dive into individual trades.

Yes. The second-story addition template covers structural work, roof modifications, floor system, framing, all MEP trades, insulation, drywall, and interior finish — fully customizable for your client's scope.

Our data is updated quarterly for 400+ U.S. markets and has been used by contractors for 20+ years. For complex projects, use the template as a starting point and adjust any line items to match your specific conditions and subcontractor quotes.

Win more high-value addition projects. Start today.

Try It Free →

Join 50,000+ contractors. No credit card required.