Home Additions and Expansions for Phoenix Homes

Explore remodeling, cabinet supply, contractor partnerships, and home expansion services from William Jackson Inc.

Custom Additions

Expand Your Home with Trusted Local Experts

Space is at a premium in Phoenix. Whether your family is growing, you need a dedicated office, or you want to design a private in-law suite, a quality home addition is the solution. William Jackson Inc. has been designing and building residential additions in Phoenix and the East Valley since 1999.

Our in-house team handles every stage, from initial planning and 3D digital renderings to construction and final walk-through. With a 2,500-square-foot Chandler showroom, you can review material options and layouts with your personal associate before work begins. We handle everything: garage expansions, second-story additions, master suite extensions, and converted living spaces. Permitting, engineering, and local building codes are managed by our team.

Garages, second stories, in-law suites, master suite expansions.

Why Phoenix Chooses Us

Accountability, Quality Control, and Itemized Transparency

Our 25-year track record means your addition is built by our own employees, not a revolving door of subcontractors. This ensures quality control on every detail, from framing to electrical. Every quote is fully itemized so you can see where every dollar goes, down to the last handle or doorknob.

We use 3D computer renderings to show you exactly what your expanded space will look like before any construction begins, removing guesswork and costly surprises. Our process includes a single associate managing your project from design to completion, so you're never handed off between departments. We adhere to all Arizona Registrar of Contractors standards (ROC #287686), and every project comes with a two-year workmanship warranty.

25 years. In-house crews. Two-year warranty.

Our Process

In-House Crews, 3D Design, and No Guesswork

It starts with a free in-home consultation anywhere in the Phoenix metro area. Next, our team creates a 3D digital model of your new space, so you can review layouts, finishes, and flow from every angle. Once you approve the design, you receive an itemized, transparent bid — no hidden fees, no budget creep.

Our in-house crews handle demolition, framing, electrical, plumbing, and core installation, while specialized partners are brought in where required for drywall, large tile, or custom glass. Permitting and engineering are managed by our staff. During construction, your associate keeps you updated and ensures your home stays clean and secure. We serve Phoenix neighborhoods including Arcadia, Ahwatukee, Paradise Valley, and the greater East Valley.

3D model. Itemized bid. One associate, start to finish.

Built to Last

Your Phoenix Addition, Built to Last

A home addition is a major investment, both financially and emotionally. With William Jackson Inc., you get more than construction. Our 25-year history in Phoenix and Chandler means you benefit from institutional knowledge and a network of trusted suppliers.

We handle everything from code compliance to final inspections, and our two-year workmanship warranty offers peace of mind long after the project is done. No project is too small or too complex, thanks to our no-job-minimum policy. Whether you want to add a simple room or overhaul your entire floor plan, we ensure quality at every step.

Code compliance, inspections, and warranty all included.

Home Addition FAQs

Phoenix Home Addition FAQs: Process, Pricing, and Timelines