Inside the home additions process: a real Austin project, documented from the ground up
Every phase from excavation through finish work, photographed on active Teamwork Home Designs projects. The before photos are here. Come back in a few months for the after.
Most contractors show you the finished product. We are showing you the whole home additions process, from the first shovel in the ground to tile being set on the floor. These photos are from real projects currently underway in Austin. No staging, no cleanup, no skipping to the good part. Just the actual work, documented at every stage.
If you are planning an addition and want to understand what the build actually involves, this is it. Once these projects wrap up, this post gets updated with the finished results. Check back in a few months.
Site preparation and excavation: where every home additions process starts
Before a single piece of lumber goes up, the site has to be ready. That means excavating to the correct depth, grading for drainage, locating underground utilities, and setting forms before the pour. Any conflicts with existing plumbing or electrical get resolved here before they become expensive mid-build surprises. On this Austin project, the team used a skid steer to dig out the addition footprint. The orange safety fencing marks the tree protection zone, a real permit requirement when heritage oaks are within range of the work area.
Excavation in progress. The skid steer digs to the correct depth before concrete forms are set.
The slab poured and curing. Anchor bolts are already set for the wall framing that follows.
Most surprises in a home addition happen underground. The site work phase is where you find them, and where a good contractor solves them before framing ever starts.
Foundation walls: building the base that carries everything above
Once the slab cures, the foundation walls go up. On this project the grade change required a concrete stem wall to tie the new addition into the existing structure at the right elevation. The stone veneer of the original home is visible on the right. The new concrete stem wall is being formed and poured on the left. Getting this connection structurally correct matters more than most homeowners realize. The addition has to be married to the original foundation.
The new addition rising from its foundation. The concrete stem wall below transitions to wood framing above, then ZIP System sheathing closes the envelope.
Framing: when the home additions process becomes visible from the street
Framing is the phase most homeowners wait for. The walls go up, the trusses land, and the footprint of what you are adding becomes something you can walk through. On this project, the crew built a two-story addition attached to an existing stone home with a vaulted ceiling in the main room. ZIP System sheathing closes the envelope as each section of framing is completed.
The addition rises. ZIP System structural sheathing is applied as each section of framing is completed.
The framing stage is where you start to feel the scale of what is being added. A number on a floor plan becomes a room you are standing inside.
The crew inside the framed addition. The Hill Country view through the window openings shows exactly why this homeowner chose to expand in place rather than move.
Rough-ins and insulation: the work inside the walls
After framing, the mechanical systems go in before anything gets closed up. Electrical is run to every box, plumbing is roughed in for wet spaces, HVAC ducts are positioned, and insulation follows once inspections pass. Moving a duct or a panel after drywall is expensive. Getting it right here is not. The arched detail framed into the hallway opening between the old and new section is a design choice locked in at the planning stage. That kind of detail does not get added later.
The arched opening framed between the old structure and the new addition. Details like this are decided in the design phase and built into the framing from the start.
Finish work: floors, tile, and the details that define the final result
Drywall goes up, mud and tape follow, and then the finish trades take over. Flooring, tile, cabinetry, fixtures, paint. This is the slowest part of the home additions process in terms of feel, because each trade has to wait for the previous one to finish before starting. It is also where the design selections made months ago finally show up in physical form.
These photos show large-format wood-look tile being set with leveling clips in one of the new rooms, and a custom patterned tile installation in progress in the addition’s bathroom. The yellow leveling clips ensure every tile sits flat and the grout joints stay consistent while the adhesive cures. It takes longer than it looks from the outside.
