diff --git a/packages/language-service/api.ts b/packages/language-service/api.ts
index 7496f4f212f..af243594916 100644
--- a/packages/language-service/api.ts
+++ b/packages/language-service/api.ts
@@ -41,6 +41,11 @@ export interface PluginConfig {
    * If false, disables parsing of `@let` declarations in the compiler.
    */
   enableLetSyntax?: false;
+
+  /**
+   * A list of diagnostic codes that should be supressed in the language service.
+   */
+  suppressAngularDiagnosticCodes?: number[];
 }
 
 export type GetTcbResponse = {
diff --git a/packages/language-service/src/language_service.ts b/packages/language-service/src/language_service.ts
index 647d2de240d..92e6dd2eba5 100644
--- a/packages/language-service/src/language_service.ts
+++ b/packages/language-service/src/language_service.ts
@@ -88,7 +88,12 @@ export class LanguageService {
         const program = compiler.getCurrentProgram();
         const sourceFile = program.getSourceFile(fileName);
         if (sourceFile) {
-          const ngDiagnostics = compiler.getDiagnosticsForFile(sourceFile, OptimizeFor.SingleFile);
+          let ngDiagnostics = compiler.getDiagnosticsForFile(sourceFile, OptimizeFor.SingleFile);
+          if (this.config.suppressAngularDiagnosticCodes) {
+            ngDiagnostics = ngDiagnostics.filter(
+              (diag) => !this.config.suppressAngularDiagnosticCodes!.includes(diag.code),
+            );
+          }
           // There are several kinds of diagnostics returned by `NgCompiler` for a source file:
           //
           // 1. Angular-related non-template diagnostics from decorated classes within that