diff --git a/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.html b/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.html
index f41910ec0..4ea4e8c28 100644
--- a/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.html
+++ b/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.html
@@ -85,6 +85,7 @@
                 <input matInput cdkFocusInitial required placeholder="{{ 'LIBRARY.DIALOG.FORM.NAME' | translate }}"
                     formControlName="title">
 
+                <mat-hint *ngIf="libraryTitleExists">{{ 'LIBRARY.HINTS.SITE_TITLE_EXISTS' | translate }}</mat-hint>
                 <mat-error *ngIf="form.controls['title'].hasError('maxlength')">
                     {{ 'LIBRARY.ERRORS.TITLE_TOO_LONG' | translate }}
                 </mat-error>
diff --git a/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.spec.ts b/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.spec.ts
index 9b54f8c65..ab7652fb6 100644
--- a/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.spec.ts
+++ b/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.spec.ts
@@ -23,16 +23,23 @@
  * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 import { LibraryMetadataFormComponent } from './library-metadata-form.component';
-import { TestBed, ComponentFixture } from '@angular/core/testing';
+import {
+  TestBed,
+  ComponentFixture,
+  fakeAsync,
+  tick
+} from '@angular/core/testing';
 import { Store } from '@ngrx/store';
 import { UpdateLibraryAction } from '../../../store/actions';
 import { AppTestingModule } from '../../../testing/app-testing.module';
 import { NO_ERRORS_SCHEMA } from '@angular/core';
 import { Site, SiteBody } from 'alfresco-js-api';
+import { AlfrescoApiService, AlfrescoApiServiceMock } from '@alfresco/adf-core';
 
 describe('LibraryMetadataFormComponent', () => {
   let fixture: ComponentFixture<LibraryMetadataFormComponent>;
   let component: LibraryMetadataFormComponent;
+  let alfrescoApiService: AlfrescoApiService;
   const storeMock = {
     dispatch: jasmine.createSpy('dispatch')
   };
@@ -41,12 +48,16 @@ describe('LibraryMetadataFormComponent', () => {
     TestBed.configureTestingModule({
       imports: [AppTestingModule],
       declarations: [LibraryMetadataFormComponent],
-      providers: [{ provide: Store, useValue: storeMock }],
+      providers: [
+        { provide: Store, useValue: storeMock },
+        { provide: AlfrescoApiService, useClass: AlfrescoApiServiceMock }
+      ],
       schemas: [NO_ERRORS_SCHEMA]
     });
 
     fixture = TestBed.createComponent(LibraryMetadataFormComponent);
     component = fixture.componentInstance;
+    alfrescoApiService = TestBed.get(AlfrescoApiService);
   });
 
   afterEach(() => {
@@ -211,4 +222,98 @@ describe('LibraryMetadataFormComponent', () => {
 
     expect(component.form.value).toEqual(siteEntryModel);
   });
+
+  it('should warn if library name input is used by another library', fakeAsync(() => {
+    const title = 'some-title';
+    spyOn(
+      alfrescoApiService.getInstance().core.queriesApi,
+      'findSites'
+    ).and.returnValue(
+      Promise.resolve({
+        list: { entries: [{ entry: { title } }] }
+      })
+    );
+
+    const siteEntryModel = {
+      title: 'libraryTitle',
+      description: 'description',
+      visibility: 'PRIVATE'
+    };
+
+    component.node = {
+      entry: <Site>{
+        id: 'libraryId',
+        ...siteEntryModel
+      }
+    };
+
+    fixture.detectChanges();
+    component.form.controls.title.setValue(title);
+    fixture.detectChanges();
+
+    tick(500);
+    expect(component.libraryTitleExists).toBe(true);
+  }));
+
+  it('should not warn if library name input is the same with library node data', fakeAsync(() => {
+    spyOn(
+      alfrescoApiService.getInstance().core.queriesApi,
+      'findSites'
+    ).and.returnValue(
+      Promise.resolve({
+        list: { entries: [{ entry: { title: 'libraryTitle' } }] }
+      })
+    );
+
+    const siteEntryModel = {
+      title: 'libraryTitle',
+      description: 'description',
+      visibility: 'PRIVATE'
+    };
+
+    component.node = {
+      entry: <Site>{
+        id: 'libraryId',
+        ...siteEntryModel
+      }
+    };
+
+    fixture.detectChanges();
+    component.form.controls.title.setValue('libraryTitle');
+    fixture.detectChanges();
+
+    tick(500);
+    expect(component.libraryTitleExists).toBe(false);
+  }));
+
+  it('should not warn if library name is unique', fakeAsync(() => {
+    spyOn(
+      alfrescoApiService.getInstance().core.queriesApi,
+      'findSites'
+    ).and.returnValue(
+      Promise.resolve({
+        list: { entries: [] }
+      })
+    );
+
+    const siteEntryModel = {
+      title: 'libraryTitle',
+      description: 'description',
+      visibility: 'PRIVATE'
+    };
+
+    component.node = {
+      entry: <Site>{
+        id: 'libraryId',
+        ...siteEntryModel
+      }
+    };
+
+    fixture.detectChanges();
+    component.form.controls.title.setValue('some-name');
+    fixture.detectChanges();
+
+    tick(500);
+    expect(component.libraryTitleExists).toBe(false);
+  }));
 });
diff --git a/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.ts b/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.ts
index e687bb8f1..c9a707d9e 100644
--- a/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.ts
+++ b/src/app/components/info-drawer/library-metadata-tab/library-metadata-form.component.ts
@@ -23,22 +23,27 @@
  * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 
-import { Component, Input, OnInit, OnChanges } from '@angular/core';
+import { Component, Input, OnInit, OnChanges, OnDestroy } from '@angular/core';
 import { FormGroup, FormControl, Validators } from '@angular/forms';
-import { SiteEntry } from 'alfresco-js-api';
+import { SiteEntry, SitePaging } from 'alfresco-js-api';
 import { Store } from '@ngrx/store';
 import { UpdateLibraryAction } from '../../../store/actions';
 import { AppStore } from '../../../store/states/app.state';
+import { debounceTime, mergeMap, takeUntil } from 'rxjs/operators';
+import { AlfrescoApiService } from '@alfresco/adf-core';
+import { Observable, from, Subject } from 'rxjs';
 
 @Component({
   selector: 'app-library-metadata-form',
   templateUrl: './library-metadata-form.component.html'
 })
-export class LibraryMetadataFormComponent implements OnInit, OnChanges {
+export class LibraryMetadataFormComponent
+  implements OnInit, OnChanges, OnDestroy {
   @Input()
   node: SiteEntry;
 
   edit: boolean;
+  libraryTitleExists = false;
 
   libraryType = [
     { value: 'PUBLIC', label: 'LIBRARY.VISIBILITY.PUBLIC' },
@@ -56,7 +61,12 @@ export class LibraryMetadataFormComponent implements OnInit, OnChanges {
     visibility: new FormControl(this.libraryType[0].value)
   });
 
-  constructor(protected store: Store<AppStore>) {}
+  onDestroy$: Subject<boolean> = new Subject<boolean>();
+
+  constructor(
+    private alfrescoApiService: AlfrescoApiService,
+    protected store: Store<AppStore>
+  ) {}
 
   get canUpdateLibrary() {
     return (
@@ -79,6 +89,32 @@ export class LibraryMetadataFormComponent implements OnInit, OnChanges {
 
   ngOnInit() {
     this.updateForm(this.node);
+
+    this.form.controls['title'].valueChanges
+      .pipe(
+        debounceTime(300),
+        mergeMap(title => this.findLibraryByTitle(title)),
+        takeUntil(this.onDestroy$)
+      )
+      .subscribe(result => {
+        const { entries } = result.list;
+
+        if (entries.length) {
+          if (this.form.controls.title.value === this.node.entry.title) {
+            this.libraryTitleExists = false;
+          } else {
+            this.libraryTitleExists =
+              this.form.controls.title.value === entries[0].entry.title;
+          }
+        } else {
+          this.libraryTitleExists = false;
+        }
+      });
+  }
+
+  ngOnDestroy() {
+    this.onDestroy$.next(true);
+    this.onDestroy$.complete();
   }
 
   ngOnChanges() {
@@ -101,4 +137,16 @@ export class LibraryMetadataFormComponent implements OnInit, OnChanges {
       visibility: entry.visibility
     });
   }
+
+  private findLibraryByTitle(libraryTitle: string): Observable<SitePaging> {
+    return from(
+      this.alfrescoApiService
+        .getInstance()
+        .core.queriesApi.findSites(libraryTitle, {
+          maxItems: 1,
+          fields: ['title']
+        })
+        .catch(() => ({ list: { entries: [] } }))
+    );
+  }
 }