Home Addition Contractor in Golden, CO: Foundation-to-Roof Case Study
Project: Full home addition — foundation to roof • Location: Golden, Colorado (Jefferson County) • Contractor: Josh Brooks Construction and Renovation Inc.
The Project: Adding Real Square Footage, Built Like the Original House
Most “additions” you see advertised are glorified sunrooms on pier blocks. This one isn’t. This Golden homeowner needed genuine living space added to their home — which means a full engineered foundation, poured concrete stem walls, a reinforced slab, and framing that ties structurally into the existing house, all permitted and inspected through Jefferson County. Here’s how we built it from the dirt up.
Phase 1: Excavation and Engineered Footings
We excavated below frost depth along the addition footprint and set continuous rebar cages per the structural engineer’s specs. Front Range soils are full of river rock and expansive clay — the footing design accounts for both.
Continuous rebar cage tied and ready for footing inspection.Reinforcement carries continuously through every corner — no weak points.
Footings poured with vertical dowels set — the stem walls lock into these mechanically.
Phase 2: Formed and Poured Stem Walls
Stem wall forms were set, braced, and poured monolithically with the rebar tying down into the footing dowels. The new foundation runs tight alongside the existing house and connects to it — this is where an addition either becomes part of the home or becomes a future crack line. We build for the first outcome.
Forms and steel set directly alongside the existing structure.Braced forms filled — a clean, consolidated pour end to end.
Phase 3: Below-Grade Waterproofing
Every inch of new concrete below grade got a waterproofing coat before backfill. It’s a step some contractors skip because it gets buried and nobody sees it. It’s also the difference between a dry addition and a musty one ten years from now.
Coating applied to the stripped stem walls before backfill.Finished stem wall, sealed below grade.
Phase 4: Reinforced Slab
Base compacted, welded wire reinforcement placed, forms pinned, and the slab poured and screeded flush to tie into the existing home’s floor elevation.
Wire reinforcement placed over compacted base, ready for the pour.Slab poured and screeded — from here it goes vertical: framing, roof tie-in, and finish.
Why Additions Fail — and Why This One Won’t
When additions go wrong, it’s almost never the drywall. It’s the foundation: undersized footings, no reinforcement continuity, skipped waterproofing, or a slab that wasn’t tied to the existing structure. Everything above grade depends on what happens below it. That’s why we self-perform the foundation work with the same crew that frames and roofs the addition — one contractor, one standard, one accountable party from excavation through the final roof shingle.
Planning an Addition in Golden or Jefferson County?
Josh Brooks Construction and Renovation Inc. is a licensed general contractor serving Golden and all of Jefferson County, building since 1996. We handle the entire addition in-house: engineering coordination, Jefferson County permits and inspections, foundation, framing, roofing, siding, and finish. Call 720-828-7997 or text 720-453-5095 for a free consultation.
Related services: Kitchen Remodeling in Golden • Structural Wall Removal in Golden • Basement Finishing in Golden
