How Much Does It Cost to Build a Custom Home in 2026? San Diego & Austin Prices

The first question every future homeowner asks is also the
hardest to answer honestly: what will it cost? Any single number
is misleading, so here are the real 2026 ranges for our two
markets — San Diego County and Austin, Texas — plus everything
the per-square-foot figure leaves out.

Custom home cost per square foot in San Diego (2026)

Construction-only costs in San Diego typically run $400–$500
per square foot for a
basic
custom build, $500–$600 for mid-range, and $600 or more per
square foot for luxury — with high-spec luxury reaching
$600–$1,000+ per square foot. These are build costs only: land,
permits, design, and engineering are additional. All in, the
average San Diego custom home lands around $1.4M including
land.

Custom home cost per square foot in Austin (2026)

In Austin, true custom construction starts around $400–$450
per square foot at the entry end, most custom builds land
between $500 and $700 per square foot, and extreme high-spec
projects can reach $1,000–$1,100 per square foot. Land is
separate.

What the per-square-foot number leaves out

On a typical San Diego project, roughly 67% of the total
budget goes to construction, 25% to land, 3% to
architecture/design, 3% to permits and fees, and 2% to surveys,
civil engineering, and grading plans. Then come the extras that
surprise first-time builders: pools ($85,000–$150,000+), casitas
or ADUs ($400–$600 per square foot), site work on sloped lots,
retaining walls, and coastal or HOA requirements in premium areas
like La Jolla and Rancho Santa Fe.

Two quick budget examples

A 3,500 sq ft mid-range custom home in San Diego at $550/sq
ft = about $1.9M in construction alone, before land. The same size
in Austin at $600/sq ft = about $2.1M before land. Your finishes,
site, and design complexity move these numbers more than anything
else.

How long does it take?

In San Diego, expect roughly 24 months from start to finish:
2–5 months finding land, 3–5 months in design, and 8–12 months
of construction, with permit timelines varying by city. In
Austin, construction alone typically runs 9–18 months.

Get numbers for your lot

These are 2026 market ranges, not a quote — every lot and
design is different.
Contact
us for a free consultation and we’ll put real numbers to your
project.