diff --git a/backend/api/projects/resources.py b/backend/api/projects/resources.py
index ffbc168d7a..7cab8165c3 100644
--- a/backend/api/projects/resources.py
+++ b/backend/api/projects/resources.py
@@ -520,6 +520,9 @@ def setup_search_dto(self):
             search_dto.mapping_types = map(
                 str, mapping_types_str.split(",")
             )  # Extract list from string
+        search_dto.mapping_types_exact = strtobool(
+            request.args.get("mappingTypesExact", "false")
+        )
         project_statuses_str = request.args.get("projectStatuses")
         if project_statuses_str:
             search_dto.project_statuses = map(str, project_statuses_str.split(","))
@@ -569,6 +572,11 @@ def get(self):
             - in: query
               name: mappingTypes
               type: string
+            - in: query
+              name: mappingTypesExact
+              type: boolean
+              default: false
+              description: if true, limits projects to match the exact mapping types requested
             - in: query
               name: organisationName
               description: Organisation name to search for
diff --git a/backend/models/dtos/project_dto.py b/backend/models/dtos/project_dto.py
index 2445a8157e..51ba001f73 100644
--- a/backend/models/dtos/project_dto.py
+++ b/backend/models/dtos/project_dto.py
@@ -291,6 +291,7 @@ class ProjectSearchDTO(Model):
     preferred_locale = StringType(default="en")
     mapper_level = StringType(validators=[is_known_mapping_level])
     mapping_types = ListType(StringType, validators=[is_known_mapping_type])
+    mapping_types_exact = BooleanType(required=False)
     project_statuses = ListType(StringType, validators=[is_known_project_status])
     organisation_name = StringType()
     organisation_id = IntType()
diff --git a/backend/services/project_search_service.py b/backend/services/project_search_service.py
index 6c0fe23704..897c98c0bc 100644
--- a/backend/services/project_search_service.py
+++ b/backend/services/project_search_service.py
@@ -263,12 +263,21 @@ def _filter_projects(search_dto: ProjectSearchDTO, user):
         if search_dto.mapping_types:
             # Construct array of mapping types for query
             mapping_type_array = []
-            mapping_type_array = [
-                MappingTypes[mapping_type].value
-                for mapping_type in search_dto.mapping_types
-            ]
 
-            query = query.filter(Project.mapping_types.contains(mapping_type_array))
+            if search_dto.mapping_types_exact:
+                mapping_type_array = [
+                    {
+                        MappingTypes[mapping_type].value
+                        for mapping_type in search_dto.mapping_types
+                    }
+                ]
+                query = query.filter(Project.mapping_types.in_(mapping_type_array))
+            else:
+                mapping_type_array = [
+                    MappingTypes[mapping_type].value
+                    for mapping_type in search_dto.mapping_types
+                ]
+                query = query.filter(Project.mapping_types.overlap(mapping_type_array))
 
         if search_dto.text_search:
             # We construct an OR search, so any projects that contain or more of the search terms should be returned
diff --git a/frontend/src/components/projects/messages.js b/frontend/src/components/projects/messages.js
index e216a37517..8c6e24c424 100644
--- a/frontend/src/components/projects/messages.js
+++ b/frontend/src/components/projects/messages.js
@@ -32,6 +32,10 @@ export default defineMessages({
     id: 'project.navFilters.typesOfMapping',
     defaultMessage: 'Types of mapping',
   },
+  exactMatch: {
+    id: 'project.navFilters.typesOfMapping.exactMatch',
+    defaultMessage: 'Exact match',
+  },
   campaigns: {
     id: 'project.navFilters.campaigns',
     defaultMessage: 'All campaigns',
diff --git a/frontend/src/components/projects/moreFiltersForm.js b/frontend/src/components/projects/moreFiltersForm.js
index a681475eb1..af27eb9d21 100644
--- a/frontend/src/components/projects/moreFiltersForm.js
+++ b/frontend/src/components/projects/moreFiltersForm.js
@@ -1,10 +1,11 @@
 import React from 'react';
 import { Link } from '@reach/router';
-import { useQueryParam } from 'use-query-params';
+import { useQueryParam, BooleanParam } from 'use-query-params';
 import { FormattedMessage } from 'react-intl';
 
 import messages from './messages';
 import { Button } from '../button';
+import { SwitchToggle } from '../formInputs';
 import { useTagAPI } from '../../hooks/UseTagAPI';
 import { useExploreProjectsQueryParams } from '../../hooks/UseProjectsQueryAPI';
 import { MappingTypeFilterPicker } from './mappingTypeFilterPicker';
@@ -20,8 +21,9 @@ export const MoreFiltersForm = (props) => {
     const target = event.target;
     let value = target.type === 'checkbox' ? target.checked : target.value;
     const name = target.name;
-    if (name === 'types') {
-      //handle mappingTypes toggles in its separate fn inside that component
+    if (name === 'types' || !name) {
+      // handle mappingTypes toggles in its separate fn inside that component
+      // exactTypes doesn't have a name and is handled in a separate fn
       return;
     }
     setFormQuery(
@@ -44,15 +46,15 @@ export const MoreFiltersForm = (props) => {
   const [orgAPIState] = useTagAPI([], 'organisations');
   const [countriesAPIState] = useTagAPI([], 'countries', formatFilterCountriesData);
 
-  /* another useQueryParam for the second form */
   const [mappingTypesInQuery, setMappingTypes] = useQueryParam('types', CommaArrayParam);
+  const [exactTypes, setExactTypes] = useQueryParam('exactTypes', BooleanParam);
 
   const fieldsetStyle = 'w-100 bn';
   const titleStyle = 'w-100 db ttu fw5 blue-grey';
 
   return (
     <form className="pt4" onChange={handleInputChange}>
-      <fieldset id="mappingType" className={fieldsetStyle}>
+      <fieldset id="mappingType" className="bn dib">
         <legend className={titleStyle}>
           <FormattedMessage {...messages.typesOfMapping} />
         </legend>
@@ -62,6 +64,19 @@ export const MoreFiltersForm = (props) => {
         />
       </fieldset>
 
+      <fieldset id="mappingTypesExact" className="bn dib v-mid mb4">
+        {mappingTypesInQuery && mappingTypesInQuery.length ? (
+          <SwitchToggle
+            label={<FormattedMessage {...messages.exactMatch} />}
+            isChecked={Boolean(exactTypes)}
+            onChange={() => setExactTypes(!exactTypes || undefined)}
+            labelPosition="right"
+          />
+        ) : (
+          <></>
+        )}
+      </fieldset>
+
       <ProjectFilterSelect
         fieldsetName="campaign"
         fieldsetStyle={fieldsetStyle}
diff --git a/frontend/src/hooks/UseProjectsQueryAPI.js b/frontend/src/hooks/UseProjectsQueryAPI.js
index 69e8f3ad8f..bf392097dd 100644
--- a/frontend/src/hooks/UseProjectsQueryAPI.js
+++ b/frontend/src/hooks/UseProjectsQueryAPI.js
@@ -22,6 +22,7 @@ const projectQueryAllSpecification = {
   team: NumberParam,
   location: StringParam,
   types: CommaArrayParam,
+  exactTypes: BooleanParam,
   interests: CommaArrayParam,
   page: NumberParam,
   text: StringParam,
@@ -49,6 +50,7 @@ const backendToQueryConversion = {
   organisation: 'organisationName',
   location: 'country',
   types: 'mappingTypes',
+  exactTypes: 'mappingTypesExact',
   interests: 'interests',
   text: 'textSearch',
   page: 'page',
diff --git a/frontend/src/locales/en.json b/frontend/src/locales/en.json
index e9abca79f9..3049c23f3c 100644
--- a/frontend/src/locales/en.json
+++ b/frontend/src/locales/en.json
@@ -442,6 +442,7 @@
   "project.nav.showMapToggle": "Show map",
   "project.nav.listViewToggle": "List view",
   "project.navFilters.typesOfMapping": "Types of mapping",
+  "project.navFilters.typesOfMapping.exactMatch": "Exact match",
   "project.navFilters.campaigns": "All campaigns",
   "project.navFilters.showAllXTags": "Show {typeOfTag}",
   "project.inputs.placeholders.search": "Search project",