EXHIBIT 23 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors Coastal Financial Corporation: We consent to incorporation by reference in the registration statements (Nos. 33-52212, 333-01274, 333-49741, 333-54794, and 333-114040) on Forms S-8 of Coastal Financial Corporation and subsidiaries of our report dated December 14, 2005, with respect to the consolidated statements of financial condition of Coastal Financial Corporation and subsidiaries as of September 30, 2005 and 2004, and the related consolidated statements of operations, stockholders' equity and comprehensive income, and cash flows for each of the years in the three-year period ended September 30, 2005, management's assessment of the effectiveness of internal control over financial reporting as of September 30, 2005, and the effectiveness of internal control over financial reporting as of September 30, 2005 which report is incorporated by reference in the September 30, 2005 Annual Report on Form 10-K of Coastal Financial Corporation. /s/ KPMG LLP Raleigh, North Carolina December 14, 2005