Updated : 04/22/2024

Overview

New Castle County, DE has adopted the 2018 International Codes, with amendments, including the 2018 IRC and IBC. New Castle County, DE County Codes § 6.05.001 (IRC adoption), § 6.05.002 (IRC amendments), § 6.04.001 (IBC adoption) and § 6.04.002 (IBC amendments).

Helpful resources for New Castle County, Delaware include the following.

• PLRB, Ordinance and Law Coverage Discussion for Delaware

Residential Building Code

Delaware has yet to adopt a statewide residential code. Local laws will control.See PLRB, Delaware Building Codes for more information on state level codes.

New Castle County adopted the 2018 IRC, locally. Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the model code here.

You can find information about amendments to the model code here.

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2018 IRC(City of New Castle , DE § 103-1 Adoption of standards.)

...and designated as the International Residential Code 2018 Edition published by the span classhighlightInternational Code Councilspan Inc are hereby adopted as...

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for New Castle County ? No
Citation: § 6.05.002
Municipal Code https://library.municode.com/de/new_castle_county/codes/code_of_ordinances?nodeId=PTIICO_CH6BUCO_ART5RECO_S6.05.002AMINRECO
Comments:

Table R301.2(1), Climatic and Geographic Design Criteria, is filled in as follows:

GROUND SNOW LOAD	WIND DESIGN				SEISMIC DESIGN CATEGORY	SUBJECT TO DAMAGE FROM
	Speed	Topographic  effects	Special Wind  region	Wind-borne  debris zone		Weathering	Frost line  depth	Termite
25 lbs./sq.ft.	115 mph	No	No	No	B	Severe	32"	Yes

 

Winter Design Temp	Ice Barrier Underlayment Required	Flood Hazards	Air Freezing Index	Mean Annual Temp
					15 deg F	No	10/05/2000  2/04/2015	596	15 deg F

Government Officials

Comments

New Castle County, DE has adopted the 2018 IRC including appendices E and J. New Castle Couunty, DE County Code § 6.05.002 (amendments).

Section R313.1, Townhouse automatic fire sprinkler systems, is amended in the second line by deleting the word "shall" and substituting the word "may".

Section R313.1, Townhouse automatic fire sprinkler system, Exception, is amended by deleting the exception in its entirety.

Section R313.2, One- and two-family dwellings automatic fire sprinkler systems, is amended in the second line by deleting the word "shall" and substituting the word "may".

Section R313.2, One- and two-family dwellings automatic fire sprinkler systems, Exception, is amended by deleting the exception in its entirety.

New Castle Couunty, DE County Code § 6.05.002 (amendments).

Existing Buildings

Existing buildings, meaning buildings that were built in accordance to code at the time of construction, typically merit extra consideration in a current updated code.

New Castle County, DE has adopted the 2018 IRC including appendix J. New Castle Couunty, DE County Code § 6.05.002 (amendments).

Commercial Building Code

New Castle County adopted the 2018 IBC, locally. Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the code here.You can find information about amendments to the model code here.

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. See Gen.code(City of New Castle , DE § 213-7 Plan processing procedure.)

...within three months after approval of the preliminary plat otherwise such approval shall become and void unless an extension is timely applied for and granted by the Building Official provided...

Existing Buildings

New Castle County, DE has adopted the 2018 IEBC, including Appendix A and Appendix B. New Castle County, DE County Codes § 6.09.001 (adoption) and § 6.09.002 (amendments).

Other Building Codes