What Happens in Pre Construction: The Months Before Ground Breaks

People picture a custom home starting with a bulldozer. It does not. By the time equipment shows up, the budget, the schedule, and most of the quality outcome are already set.

Pre construction is the part nobody photographs and the part that decides everything. Here is what actually happens.

Phase 1: Feasibility and due diligence

Before design, the lot has to be understood. Zoning district, setbacks, lot coverage, height limits, flood zone and required finished floor elevation, survey, soil borings, tree survey, utility availability, and any HOA or design review requirements.

This phase answers one question: what can be built here, and roughly what does it cost. It is inexpensive relative to everything that follows, and it prevents the worst outcome in custom building, which is designing a house that does not fit the site or the budget. Our site due diligence service exists for this stage.

Phase 2: Schematic design

The architect develops the concept. Massing, floor plan, room relationships, how the house sits on the lot, how it addresses the water or the street.

The critical discipline here is that the builder prices as the design develops. Not once at the end. A schematic level budget catches the ten thousand square foot idea on a budget for six thousand while it is still a drawing.

Phase 3: Budget development

This is where the itemized budget gets built. Every division, every allowance, every exclusion, written down.

A real budget at this stage shows you the tile allowance per square foot, the window package, the site work, the mechanical scope, and the contingency. A single number does not. This is the document you should be comparing between builders, and it is the document that keeps the project honest for the next two years.

Carry a contingency of ten to fifteen percent. Not because the builder expects to be wrong, but because custom homes uncover things.

Phase 4: Design development and engineering

The design gets resolved into a buildable set. Structural engineering for wind and, on coastal sites, flood and elevation requirements. Mechanical, electrical, and plumbing coordination. Energy calculations. Product approvals for impact rated openings and roofing assemblies.

This is also where value engineering happens if the budget needs adjusting. It is far cheaper to change a roof geometry on paper than after the trusses are ordered.

Phase 5: Selections

Selections start earlier than most owners expect. Structural and long lead items first: windows and doors, roofing, exterior finish, appliances that affect cabinetry and mechanical, plumbing fixtures that affect rough in.

Then finishes. Tile, stone, cabinetry, hardware, lighting, paint.

The reason to front load this is simple. Every selection made after the related work has started becomes a change order, and change orders are how schedules and budgets slip. Deciding early is uncomfortable. Deciding late is expensive.

Phase 6: Permitting

The completed set goes in for review. In Palm Beach County that means the building department, and depending on the location, historic review, coastal review, HOA architectural review, or a town design board.

Plan on roughly two to five months for a new custom home, driven by drawing completeness and the number of review cycles. Complete, coordinated drawings on the first submittal is the single biggest lever on this timeline.

Phase 7: Pre construction planning

Before mobilization: the construction schedule with real durations and dependencies, subcontractor buyout, long lead material orders placed, site logistics planned, builder's risk insurance bound, and the communication cadence set.

Then the equipment arrives, and everything that was decided on paper starts to become a house.

Why this phase deserves your patience

Owners are usually eager to see something happen. Understandable. But the projects that run smoothly are almost always the ones where pre construction was not rushed.

Time spent here is cheap. Time spent fixing decisions during construction is not. For the construction side of the timeline, see our guide to how long it takes to build a custom home in Palm Beach County.

If you are at the beginning of this, start a conversation. The earlier a builder is in the room, the better your budget holds.

Frequently Asked Questions

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SouthShore Builders is based in Delray Beach and builds across Palm Beach County and Broward County.