Back to Iowa

HF2665 • 2026

A bill for an act relating to radon mitigation requirements and tax credits, including retroactive applicability provisions, and making appropriations.

A bill for an act relating to radon mitigation requirements and tax credits, including retroactive applicability provisions, and making appropriations.

Budget Taxes
Passed Legislature

This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.

Sponsor
BAETH, LEVIN, WILBURN, TUREK, B. MEYER, JACOBY, CROKEN, BROWN-POWERS, RAMIREZ, GJERDE, KRESSIG, WICHTENDAHL, EHLERT and MATSON
Last action
2026-02-23
Official status
Introduced, referred to Ways and Means. H.J. 374 .
Effective date
Not listed

Plain English Breakdown

Using official source text because the generated explanation was unavailable or could not be confirmed against the official bill text.

A bill for an act relating to radon mitigation requirements and tax credits, including retroactive applicability provisions, and making appropriations.

A bill for an act relating to radon mitigation requirements and tax credits, including retroactive applicability provisions, and making appropriations.

What This Bill Does

  • A bill for an act relating to radon mitigation requirements and tax credits, including retroactive applicability provisions, and making appropriations.

Limits and Unknowns

  • This entry is temporarily using official source text because the generated explanation could not be confirmed against the official bill text during the last sync.

Bill History

  1. 2026-02-23 Iowa Legislature

    Introduced, referred to Ways and Means. H.J. 374 .

Official Summary Text

A bill for an act relating to radon mitigation requirements and tax credits, including retroactive applicability provisions, and making appropriations.

Current Bill Text

Read the full stored bill text
House

File

2665

-

Introduced

HOUSE

FILE

2665

BY

BAETH

,

LEVIN

,

WILBURN

,

TUREK

,

B.

MEYER

,

JACOBY

,

CROKEN

,

BROWN-POWERS

,

RAMIREZ

,

GJERDE

,

KRESSIG

,

WICHTENDAHL

,

EHLERT

,

and

MATSON

A

BILL

FOR

An

Act

relating

to

radon

mitigation

requirements

and

tax

1

credits,

including

retroactive

applicability

provisions,

and

2

making

appropriations.

3

BE

IT

ENACTED

BY

THE

GENERAL

ASSEMBLY

OF

THE

STATE

OF

IOWA:

4

TLSB

5736YH

(6)

91

ak/ko

H.F.

2665

DIVISION

I

1

RADON

MITIGATION

——

STATE

BUILDING

CODE

2

Section

1.

NEW

SECTION

.

103A.8E

Radon

mitigation

3

requirements.

4

The

commissioner

shall

adopt

as

part

of

the

state

building

5

code

a

requirement

that

new

single-family

or

two-family

6

residential

construction

must

include

passive

methods

for

the

7

mitigation

of

radon.

The

requirement

shall

only

apply

to

8

single-family

or

two-family

residential

construction

commenced

9

after

the

adoption

of

the

requirement.

10

DIVISION

II

11

RADON

MITIGATION

SYSTEMS

——

TAX

CREDITS

12

Sec.

2.

NEW

SECTION

.

422.10D

Radon

mitigation

system

tax

13

credit.

14

1.

For

purposes

of

this

section,

“radon

mitigation

system”

15

means

a

system

designed

to

mitigate

the

presence

of

radon

in

16

a

building

installed

by

a

person

certified

in

accordance

with

17

chapter

136B.

18

2.

The

taxes

imposed

under

this

subchapter,

less

the

credits

19

allowed

under

section

422.12,

shall

be

reduced

by

a

radon

20

mitigation

system

tax

credit

equal

to

the

amount

to

purchase

21

and

install

a

radon

mitigation

system,

not

to

exceed

one

22

thousand

dollars.

23

3.

An

individual

may

claim

the

tax

credit

allowed

a

24

partnership,

limited

liability

company,

S

corporation,

estate,

25

or

trust

electing

to

have

the

income

taxed

directly

to

the

26

individual.

The

amount

claimed

by

the

individual

shall

be

27

based

upon

the

pro

rata

share

of

the

individual’s

earnings

of

28

the

partnership,

limited

liability

company,

S

corporation,

29

estate,

or

trust.

30

4.

Any

credit

in

excess

of

the

taxpayer’s

tax

liability

31

for

the

tax

year

is

not

refundable

but

the

excess

for

the

tax

32

year

may

be

credited

to

the

tax

liability

for

the

following

tax

33

year.

34

Sec.

3.

Section

422.33,

Code

2026,

is

amended

by

adding

the

35

-1-

LSB

5736YH

(6)

91

ak/ko

1/

5

H.F.

2665

following

new

subsection:

1

NEW

SUBSECTION

.

11.

a.

The

taxes

imposed

under

this

2

subchapter

shall

be

reduced

by

a

radon

mitigation

system

tax

3

credit

equal

to

the

amount

to

purchase

and

install

a

radon

4

mitigation

system,

not

to

exceed

one

thousand

dollars.

5

b.

The

taxpayer

may

claim

the

credit

pursuant

to

this

6

subsection

according

to

the

same

requirements,

conditions,

and

7

limitations

as

provided

pursuant

to

section

422.10D.

8

Sec.

4.

RETROACTIVE

APPLICABILITY.

The

following

apply

9

retroactively

to

January

1,

2026,

for

tax

years

beginning

on

10

or

after

that

date:

11

1.

The

section

of

this

division

of

this

Act

enacting

section

12

422.10D.

13

2.

The

section

of

this

division

of

this

Act

amending

section

14

422.33.

15

DIVISION

III

16

RADON

MITIGATION

——

RENTAL

PROPERTIES

17

Sec.

5.

Section

562A.15,

Code

2026,

is

amended

by

adding

the

18

following

new

subsection:

19

NEW

SUBSECTION

.

5.

a.

For

purposes

of

this

subsection,

20

“radon

mitigation

system”

means

a

system

designed

to

mitigate

21

the

presence

of

radon

in

a

building

installed

by

a

person

22

certified

in

accordance

with

chapter

136B.

23

b.

A

tenant

may

conduct

a

radon

test

or

hire

a

person

24

certified

in

accordance

with

chapter

136B

to

conduct

a

radon

25

test

in

the

dwelling

unit.

If

the

results

of

the

test

show

a

26

radon

level

equal

to

or

greater

than

four

picocuries

per

liter,

27

the

tenant

shall

provide

the

landlord

a

written

copy

of

those

28

test

results.

29

c.

The

landlord

may

have

a

confirmatory

radon

test

conducted

30

by

a

person

certified

in

accordance

with

chapter

136B

and,

31

if

applicable,

shall

provide

the

tenant

a

written

copy

of

32

those

test

results.

If

the

confirmatory

test

result

is

33

equal

to

or

greater

than

four

picocuries

per

liter,

or

if

the

34

landlord

chooses

not

to

have

a

confirmatory

test

conducted,

the

35

-2-

LSB

5736YH

(6)

91

ak/ko

2/

5

H.F.

2665

landlord

shall

have

a

radon

mitigation

system

installed

in

the

1

dwelling

unit

by

a

person

certified

in

accordance

with

chapter

2

136B.

Once

a

radon

mitigation

system

has

been

installed,

the

3

landlord

shall

have

the

dwelling

unit

retested

and

the

landlord

4

shall

provide

the

tenant

a

written

copy

of

those

new

test

5

results

within

ninety

days

from

the

day

the

tenant

provided

6

notification

of

elevated

radon

levels

to

the

landlord.

7

d.

If,

within

the

ninety-day

period

established

in

paragraph

8

“b”

,

the

landlord

fails

to

have

a

radon

mitigation

system

9

installed

in

accordance

with

chapter

136B

after

receiving

10

notice

of

elevated

radon

levels

or

if

a

radon

mitigation

system

11

is

installed

and

radon

test

results

remain

equal

to

or

greater

12

than

four

picocuries

per

liter,

the

tenant

may

terminate

the

13

lease

and

the

landlord

shall

return

all

prepaid

rent

and

the

14

rental

deposit

and

shall

not

impose

any

penalties

against

15

the

tenant.

The

tenant

shall

provide

written

notice

to

the

16

landlord

of

intent

to

terminate

the

lease.

The

termination

17

date

may

be

effective

immediately

or

on

a

later

date

agreed

18

to

by

the

tenant

and

landlord

to

allow

the

tenant

to

obtain

19

alternative

housing.

20

DIVISION

IV

21

APPROPRIATION

——

RADON

TEST

KITS

22

Sec.

6.

DEPARTMENT

OF

HEALTH

AND

HUMAN

SERVICES

——

RADON

23

TEST

KITS.

24

1.

There

is

appropriated

from

the

general

fund

of

the

state

25

to

the

department

of

health

and

human

services

for

the

fiscal

26

year

beginning

July

1,

2026,

and

ending

June

30,

2027,

the

27

following

amount,

or

so

much

thereof

as

is

necessary,

to

be

28

used

for

the

purposes

designated:

29

To

make

radon

test

kits

available

free

of

charge

to

30

homeowners

and

renters

in

the

state:

31

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

$

100,000

32

2.

The

department

shall

provide

a

link

on

the

department’s

33

internet

site

for

homeowners

and

renters

in

the

state

to

order

34

radon

test

kits.

35

-3-

LSB

5736YH

(6)

91

ak/ko

3/

5

H.F.

2665

EXPLANATION

1

The

inclusion

of

this

explanation

does

not

constitute

agreement

with

2

the

explanation’s

substance

by

the

members

of

the

general

assembly.

3

This

bill

relates

to

radon

mitigation

requirements

and

tax

4

credits.

5

DIVISION

I

——

RADON

MITIGATION

——

STATE

BUILDING

CODE.

The

6

bill

requires

that

the

state

building

code

commissioner

adopt,

7

as

part

of

the

state

building

code,

that

new

single-family

or

8

two-family

residential

construction

starting

after

adoption

of

9

the

building

code

must

include

passive

methods

for

mitigation

10

of

radon.

11

DIVISION

II

——

RADON

MITIGATION

TAX

CREDIT.

The

bill

creates

12

a

radon

mitigation

system

tax

credit

(credit)

available

against

13

the

individual

and

corporate

income

taxes.

Under

the

bill,

14

the

credit

is

equal

to

the

amount

of

the

cost

to

purchase

and

15

install

a

radon

mitigation

system,

not

to

exceed

$1,000.

Any

16

credit

in

excess

of

the

taxpayer’s

liability

is

not

refundable

17

but

may

be

credited

to

the

tax

liability

for

the

following

tax

18

year.

The

bill

defines

“radon

mitigation

system”

(system)

to

19

mean

a

system

designed

to

mitigate

the

presence

of

radon

in

a

20

building

installed

by

a

person

certified

in

accordance

with

21

Code

chapter

136B.

The

credit

applies

retroactively

to

January

22

1,

2025,

for

tax

years

beginning

on

or

after

that

date.

23

DIVISION

III

——

RADON

MITIGATION

——

RENTAL

PROPERTIES.

The

24

bill

provides

that

a

tenant

may

conduct

a

radon

test

(test)

25

or

hire

a

person

certified

in

accordance

with

Code

chapter

26

136B

to

conduct

a

test.

The

tenant

shall

notify

the

landlord

27

of

a

test

result

equal

to

or

greater

than

four

picocuries

28

per

liter

(4pCi/L),

which

is

the

United

States

environmental

29

protection

agency’s

action

level

for

radon.

The

landlord

may

30

have

a

confirmatory

test

conducted

by

a

certified

person

and

31

must

notify

the

tenant

of

those

results.

If

a

subsequent

32

test

result

is

equal

to

or

greater

than

4pCi/L,

or

if

the

33

landlord

chooses

not

to

have

a

subsequent

test

conducted,

the

34

landlord

shall

have

a

system

installed.

Once

a

system

has

35

-4-

LSB

5736YH

(6)

91

ak/ko

4/

5

H.F.

2665

been

installed,

the

rental

property

shall

be

retested

and

the

1

results

shall

be

given

to

the

tenant

within

90

days.

2

The

bill

provides

that

if

the

landlord

fails

to

have

a

3

system

installed,

or

if

a

system

is

installed

and

radon

test

4

results

remain

equal

to

or

greater

than

4pCi/L,

the

tenant

may

5

terminate

the

lease

with

proper

written

notice.

Upon

receipt

6

of

this

notice,

the

landlord

cannot

impose

any

penalty

for

7

termination

of

the

lease

against

the

tenant

and

must

return

all

8

prepaid

rent

and

the

rental

deposit.

9

DIVISION

IV

——

APPROPRIATION

——

RADON

TEST

KITS.

The

bill

10

appropriates

$100,000

from

the

general

fund

to

the

department

11

of

health

and

human

services

(HHS)

for

the

fiscal

year

12

beginning

July

1,

2026,

and

ending

June

30,

2027,

to

make

radon

13

test

kits

available

free

of

charge

to

homeowners

and

renters

in

14

the

state.

HHS

is

required

to

provide

a

link

on

its

internet

15

site

for

homeowners

and

renters

to

order

radon

test

kits.

16

-5-

LSB

5736YH

(6)

91

ak/ko

5/

5