Sample Construction Proposals

Sample Construction Proposal for ADU (Accessory Dwelling Unit)

Download a real-world ADU construction proposal and see exactly how contractors structure estimates for ground-up builds — from sitework and foundation to framing, electrical, and finishes. Use it as a blueprint to create your own professional proposals and win high-value projects.

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What’s Included in This ADU Construction Proposal

This sample construction proposal for ADU is a complete, contractor-ready estimate designed for ground-up residential construction projects.

Based on an 800 sq ft accessory dwelling unit totaling $208,207, this proposal includes full scope breakdowns, quantities, and pricing across every stage of the build.

Inside the proposal, you’ll find:

  • Pre-construction costs (plans, permits, engineering)
  • Sitework and foundation breakdowns
  • Framing, roofing, and exterior systems
  • Mechanical systems (electrical, HVAC, insulation)
  • Interior finishes and flooring
  • Exterior improvements (deck, siding, windows)
  • Full project total with detailed structure

This is the level of detail required for larger construction projects where scope, sequencing, and cost accuracy matter.

Sample Construction Proposal for ADU (Scope Breakdown)

Here’s how the estimate is structured:

1. Plans, Permits & Pre-Construction

  • Architectural plans and engineering
  • Permits and inspections
  • Project setup and approvals

2. Sitework & Foundation

  • Excavation and grading
  • Footings and slab foundation
  • Ground prep and stabilization

3. Framing & Structural Build

  • Floor system and subfloor
  • Wall framing
  • Roof framing and structural components

4. Roofing & Exterior Systems

  • Shingles and underlayment
  • Gutters and drainage
  • Weatherproofing and exterior protection

5. Windows, Doors & Openings

  • Window installation (full package)
  • Exterior doors and hardware
  • Structural openings

6. Exterior Finishes

  • Siding and house wrap
  • Fascia, soffits, and trim
  • Decorative elements

7. Electrical & Mechanical Systems

  • Full electrical system installation
  • HVAC system (AC + heating)
  • Ventilation and power distribution

8. Insulation & Drywall

  • Wall and attic insulation
  • Drywall installation and finishing

9. Interior Carpentry & Finishes

  • Doors, trim, and baseboards
  • Stairwork and interior build-out

10. Flooring & Interior Finishes

  • Hardwood flooring installation
  • Final surface finishes

11. Interior & Exterior Painting

  • Walls, ceilings, trim
  • Exterior surfaces

12. Exterior Features (Deck & Entry)

  • Deck construction and railing
  • Exterior steps and access

Why This Proposal Structure Works for ADU Projects

ADU builds are complex — and your proposal needs to reflect the full construction lifecycle.

This sample construction proposal for ADU works because it:

  • Follows the actual construction sequence
  • Breaks down costs across trades and phases
  • Includes pre-construction and permitting
  • Clearly separates materials and labor
  • Builds confidence for high-budget projects

This is the type of structure clients expect when investing in a full build.

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Get the download

Download the PDF to see the sample proposal and detailed estimate.

FAQs

What goes into a good ADU construction estimate?

A complete ADU estimate includes plans, permits, sitework, foundation, framing, roofing, electrical, HVAC, finishes, and exterior work — all broken down with detailed pricing.

How much does it cost to build an ADU?

ADUs typically cost $150,000 to $300,000+, depending on size, location, and finish level.

How can I create an ADU construction proposal quickly?

Instead of building proposals manually, Eano Pro allows you to generate detailed estimates with line items, apply markup automatically, and create client-ready proposals with eSign — helping you move faster and win larger projects.