The following chart identifies the manner in which each state values improvements to real estate that are not completed as of the general assessment (lien) date.

State Treatment of new construction
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Alabama An improvement to real property that
is incomplete as of October 1 of a
tax year must be reported to the
local tax assessor no later than
the following January 1 and is
assessed as incomplete for that
particular tax year (PROP-TAX-GUIDE
AL ¶20-133).
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Alaska Property committed primarily to the
production or pipeline
transportation of oil or gas or to
the operation or maintenance of oil
or gas production or transportation
facilities must be assessed at its
full and true value as of the date
that construction commences
(PROP-TAX-GUIDE AK ¶20-130).
Additionally, a two or four year
exemption from municipal property
taxes is authorized for certain
real property improvements
(PROP-TAX-GUIDE AK ¶20-222).
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Arizona Construction work in progress becomes
taxable when the work has
progressed to a degree that it is
useful for its eventual purpose
(PROP-TAX-GUIDE AZ ¶20-130).
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Arkansas There are no specific statutory
provisions in Arkansas concerning
construction work in progress.
(PROP-TAX-GUIDE AR ¶20-130).
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California Property under construction is
taxable throughout the construction
process, with the value of the
construction being determined as of
the lien date (PROP-TAX-GUIDE CA
¶20-162).
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Colorado Construction occurring after January
1 is valued on July 1 on a prorated
basis (PROP-TAX-GUIDE CO ¶20-130).
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Connecticut Assessment is made on a prorated
basis for construction completed
after the assessment date
(PROP-TAX-GUIDE CT ¶20-175).
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Delaware Delaware statutory law makes no
specific provision for the taxation
of construction work in progress
(PROP-TAX-GUIDE DE ¶20-130).
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Dist. of Col. Construction work in progress becomes
taxable when 65% of the estimated
construction is completed
(PROP-TAX-GUIDE DC ¶20-130).
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Florida Any improvement to real property that
is not substantially completed on
January 1 has no value placed on it
(PROP-TAX-GUIDE FL ¶20-130).
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Georgia Construction work in progress becomes
taxable when the work has
progressed to a degree that it is
useful for its eventual purpose
(PROP-TAX-GUIDE GA ¶20-130).
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Hawaii Generally, the value added by any new
construction, improvement,
modification, or repair of a
building must be considered in
fixing the assessed value of real
property (PROP-TAX-GUIDE HW
¶20-130).
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Idaho An occupancy tax is imposed on new
improvements in lieu of property
tax during the construction year
(PROP-TAX-GUIDE ID ¶20-130).
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Illinois When the construction of new or added
buildings or other improvements on
property are completed or initially
occupied or used after January 1,
the property owner is liable for an
increased assessment on a
proportionate basis (PROP-TAX-GUIDE
IL ¶20-171).
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Indiana Construction work in progress becomes
taxable when the work has
progressed to a degree that it is
useful for its eventual purpose
(PROP-TAX-GUIDE IN ¶20-145).
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Iowa There are no specific statutory
provisions in Iowa concerning
construction work in progress
(PROP-TAX-GUIDE IA ¶20-130).
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Kansas Improvements become taxable to the
extent completed on January 1
(PROP-TAX-GUIDE KS ¶20-130).
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Kentucky There are no specific statutory
provisions in Kentucky concerning
construction work in progress
(PROP-TAX-GUIDE KY ¶20-130).
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Louisiana Louisiana statutory law makes not
specific provisions for the
taxation of construction work in
progress (PROP-TAX-GUIDE LA
¶20-130).
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Maine The valuation of construction in
progress varies by district
(PROP-TAX-GUIDE ME ¶20-130).
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Maryland Generally, improvements become
taxable on the quarter date of
finality following substantial
completion of improvements adding
at least $50,000 in value
(PROP-TAX-GUIDE MD ¶20-149).
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Massachusetts Construction work in progress becomes
taxable once an occupancy permit is
issued (PROP-TAX-GUIDE MA ¶20-130).
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Michigan Construction work in progress becomes
taxable once an occupancy permit is
issued (PROP-TAX-GUIDE MI ¶20-130).
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Minnesota Construction work in progress is
assessed annually to the extent
completed on January 2
(PROP-TAX-GUIDE MN ¶20-130).
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Mississippi The date that improvements become
taxable is not specified by
Mississippi law, except that a
newly constructed home remains
exempt from property tax until it
is first leased, rented, sold, or
occupied (PROP-TAX-GUIDE MS
¶20-130).
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Missouri Improvements become taxable to the
extent completed on January 1
(PROP-TAX-GUIDE MO ¶20-130).
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Montana Construction of improvements does not
become taxable until completed,
with partial exemptions further
applying during the first four
years following completion
(PROP-TAX-GUIDE MT ¶20-130).
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Nebraska Improvements become taxable to the
extent completed on the December
31st prior to the January 1
assessment date (PROP-TAX-GUIDE NE
¶20-130).
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Nevada There are no specific statutory
provisions in Nevada concerning
construction work in progress
(PROP-TAX-GUIDE NV ¶20-130).
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New Hampshire There are no specific statutory
provisions in New Hampshire
concerning construction work in
progress (PROP-TAX-GUIDE NH
¶20-130).
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New Jersey Construction work in progress becomes
taxable on the first day of the
month following completion, subject
to a prorated schedule
(PROP-TAX-GUIDE NJ ¶20-130).
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New Mexico Construction work in progress in
connection with business property
is valued at 50% of the actual
amounts expended as of December
31st (PROP-TAX-GUIDE NM ¶20-130).
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New York Improvements taxable on the taxable
status date are taxable at their
value on the assessment date; there
are no special provisions for
construction work in progress
(PROP-TAX-GUIDE NY ¶20-130).
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North Carolina There are no specific statutory
provisions in North Carolina
concerning construction work in
progress (PROP-TAX-GUIDE NC
¶20-130). In valuing improvements,
assessors must consider various
factors, including type of
construction (PROP-TAX-GUIDE NC
¶20-605).
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North Dakota North Dakota exempts many
improvements for up to five years
(PROP-TAX-GUIDE ND ¶20-130).
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Ohio If a building, structure, fixture, or
other improvement to land is under
construction on January 1, its
valuation must be based on its
value or percentage of completion
as it existed on January 1
(PROP-TAX-GUIDE OH ¶20-630).
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Oklahoma An improvement is not assessed at its
fair cash value until January 1
following the date it is completed;
however, construction work in
progress is assessed at the fair
cash value of the materials used in
construction as of the January 1
assessment date (PROP-TAX-GUIDE OK
¶20-160).
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Oregon A new commercial building or
structure, or an addition to an
existing commercial building or
structure is generally not taxable
until construction is complete;
however, noncommercial property may
be assessed before construction is
complete (PROP-TAX-GUIDE OR
¶20-139).
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Pennsylvania There are no specific statutory
provisions in Pennsylvania
concerning construction work in
progress (PROP-TAX-GUIDE PA
¶20-130).
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Rhode Island Completed construction work in
progress becomes taxable either
from the date that the certificate
of occupancy is issued or the date
that it is first used, whichever
occurs first (PROP-TAX-GUIDE RI
¶20-130).
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South Carolina New structures are taxable when
completed (PROP-TAX-GUIDE SC
¶20-149).
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South Dakota Newly constructed improvements are
taxable when the improvements reach
a value of $10,000 or $30,000
depending on the structure
(PROP-TAX-GUIDE SD ¶20-130).
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Tennessee An improvement that is incomplete on
January 1 is assessed based on the
fair market value of the materials
used. If the improvement is
subsequently completed and ready
for use before the following
September 1, the assessment is
corrected to reflect the value of
the structure at the time of
completion. The corrected
assessment is then prorated for the
portion of the year following the
date of completion (PROP-TAX-GUIDE
TN ¶20-133).
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Texas There are no specific statutory
provisions in Texas concerning
construction work in progress
(PROP-TAX-GUIDE TX ¶20-158).
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Utah Construction work in progress is
valued at full cash value projected
upon completion (PROP-TAX-GUIDE UT
¶20-130).
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Vermont Towns may exempt construction work in
progress (PROP-TAX-GUIDE VT
¶20-130).
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Virginia Improvements become taxable in
Virginia when they are
substantially completed or fit for
use (PROP-TAX-GUIDE VA ¶20-130).
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Washington New construction is assessed each
year up until August 31st
(PROP-TAX-GUIDE WA ¶20-130,
PROP-TAX-GUIDE WA ¶20-660).
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West Virginia Buildings become taxable when they
are fit for use, but construction
materials are taxed as personal
property (PROP-TAX-GUIDE WV
¶20-130).
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Wisconsin There are no specific statutory
provisions in Wisconsin concerning
construction work in progress
(PROP-TAX-GUIDE WI ¶20-220).
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Wyoming There are no specific statutory
provisions in Wyoming concerning
construction work in progress
(PROP-TAX-GUIDE WY ¶20-130).