CCornerstoneBuild Co.
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Additions

Home Additions

Room additions, second stories, and garages — built to match your home.

Scope
Room additions · Second stories · Garages · ADUs
Timeline
Additions run 4–8 months depending on scope
Warranty
12-month workmanship warranty
Construction crew framing a wood-framed room addition
CO State Contractor License #GC-48213

Overview

What's included

Adding square footage without adding chaos. We design additions that match your existing architecture, handle structural engineering, and keep the build sealed so your current home stays livable.

Project gallery

Home Additions project photo 1
Home Additions project photo 2
Home Additions project photo 3
Home Additions project photo 4

What you get

  • Structural engineering included
  • Matching exterior — roof, siding, brick, windows
  • Roof and wall integration to keep your home sealed
  • Permits, inspections, and HOAs handled
  • Fixed-price contract, itemized scope
  • Temporary protection for your living space

The process

How we work

  1. 1

    01 — Feasibility

    We check setbacks, zoning, foundation, and structural loads before you spend a dime.

  2. 2

    02 — Design & permit

    Plans drawn to match your home, then permitted with your jurisdiction.

  3. 3

    03 — Foundation & frame

    New foundation tied to existing, framed and sheathed to match.

  4. 4

    04 — Tie-in & finish

    Roof, siding, and interiors finished to match the existing build.

  5. 5

    05 — Walkthrough

    Every room inspected with you, every punch item completed.

Questions

Common questions

Will the addition match my existing house?

We match roof pitch, siding, brick, windows, and trim so the addition reads as original construction.

Can we live in the home during the build?

For most additions, yes. We seal the work area and keep utilities running throughout.

Free on-site estimate — no obligation.

Response within 24 hours · Serving Denver Metro & Front Range

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