diff --git a/src/registrar/assets/src/js/getgov/table-members.js b/src/registrar/assets/src/js/getgov/table-members.js
index a1385b294..a13894e95 100644
--- a/src/registrar/assets/src/js/getgov/table-members.js
+++ b/src/registrar/assets/src/js/getgov/table-members.js
@@ -69,13 +69,14 @@ export class MembersTable extends BaseTable {
     const kebabHTML = customTableOptions.hasAdditionalActions ? generateKebabHTML('remove-member', unique_id, cancelInvitationButton, `Expand for more options for ${member.name}`): ''; 
 
     const row = document.createElement('tr');
+    row.classList.add('hide-td-borders');
     let admin_tagHTML = ``;
     if (member.is_admin)
       admin_tagHTML = `<span class="usa-tag margin-left-1 bg-primary-dark text-semibold">Admin</span>`
 
     // generate html blocks for domains and permissions for the member
-    let domainsHTML = this.generateDomainsHTML(num_domains, member.domain_names, member.domain_urls, member.action_url);
-    let permissionsHTML = this.generatePermissionsHTML(member.is_admin, member.permissions, customTableOptions.UserPortfolioPermissionChoices);
+    let domainsHTML = this.generateDomainsHTML(num_domains, member.domain_names, member.domain_urls, member.action_url, unique_id);
+    let permissionsHTML = this.generatePermissionsHTML(member.is_admin, member.permissions, customTableOptions.UserPortfolioPermissionChoices, unique_id);
 
     // domainsHTML block and permissionsHTML block need to be wrapped with hide/show toggle, Expand
     let showMoreButton = '';
@@ -96,20 +97,26 @@ export class MembersTable extends BaseTable {
         </button>
       `;
 
-      showMoreRow.innerHTML = `<td colspan='4' headers="header-member row-header-${unique_id}" class="padding-top-0"><div class='grid-row grid-gap-2'>${domainsHTML} ${permissionsHTML}</div></td>`;
-      showMoreRow.classList.add('show-more-content');
-      showMoreRow.classList.add('display-none');
+      showMoreRow.innerHTML = `
+        <td colspan='4' headers="header-member row-header-${unique_id}" class="padding-top-0">
+          ${showMoreButton}
+          <div class='grid-row grid-gap-2 show-more-content display-none'>
+            ${domainsHTML}
+            ${permissionsHTML}
+          </div>
+        </td>
+      `;
       showMoreRow.id = unique_id;
     }
 
     row.innerHTML = `
-      <th role="rowheader" headers="header-member" data-label="member email" id='row-header-${unique_id}'>
-        ${member.member_display} ${admin_tagHTML} ${showMoreButton}
+      <th class="padding-bottom-0" role="rowheader" headers="header-member" data-label="Member" id='row-header-${unique_id}'>
+        ${member.member_display} ${admin_tagHTML}
       </th>
-      <td headers="header-last-active row-header-${unique_id}" data-sort-value="${last_active.sort_value}" data-label="last_active">
+      <td class="padding-bottom-0" headers="header-last-active row-header-${unique_id}" data-sort-value="${last_active.sort_value}" data-label="Last active">
         ${last_active.display_value}
       </td>
-      <td headers="header-action row-header-${unique_id}" class="width--action-column">
+      <td class="padding-bottom-0" headers="header-action row-header-${unique_id}" class="width--action-column">
         <div class="tablet:display-flex tablet:flex-row flex-align-center">
           <a href="${member.action_url}" ${customTableOptions.hasAdditionalActions ? "class='margin-right-2'" : ''}>
             <svg class="usa-icon top-1px" aria-hidden="true" focusable="false" role="img" width="24">
@@ -146,16 +153,15 @@ export class MembersTable extends BaseTable {
      *
      * @param {HTMLElement} toggleButton - The button that toggles the content visibility.
      * @param {HTMLElement} contentDiv - The content div whose visibility is toggled.
-     * @param {HTMLElement} buttonParentRow - The parent row element containing the button.
      */
-    function toggleShowMoreButton(toggleButton, contentDiv, buttonParentRow) {
+    function toggleShowMoreButton(toggleButton, contentDiv) {
       const spanElement = toggleButton.querySelector('span');
       const useElement = toggleButton.querySelector('use');
       if (contentDiv.classList.contains('display-none')) {
         showElement(contentDiv);
         spanElement.textContent = 'Close';
         useElement.setAttribute('xlink:href', '/public/img/sprite.svg#expand_less');
-        buttonParentRow.classList.add('hide-td-borders');
+        toggleButton.classList.add('margin-bottom-2');
 
         let ariaLabelText = "Close additional information";
         let ariaLabelPlaceholder = toggleButton.getAttribute("aria-label-placeholder");
@@ -169,7 +175,7 @@ export class MembersTable extends BaseTable {
         hideElement(contentDiv);
         spanElement.textContent = 'Expand';
         useElement.setAttribute('xlink:href', '/public/img/sprite.svg#expand_more');
-        buttonParentRow.classList.remove('hide-td-borders');
+        toggleButton.classList.remove('margin-bottom-2');
 
         let ariaLabelText = "Expand for additional information";
         let ariaLabelPlaceholder = toggleButton.getAttribute("aria-label-placeholder");
@@ -182,14 +188,11 @@ export class MembersTable extends BaseTable {
   
     let toggleButtons = document.querySelectorAll('.usa-button--show-more-button');
     toggleButtons.forEach((toggleButton) => {
-      
-      // get contentDiv for element specified in data-for attribute of toggleButton
-      let dataFor = toggleButton.dataset.for;
-      let contentDiv = document.getElementById(dataFor);
       let buttonParentRow = toggleButton.parentElement.parentElement;
-      if (contentDiv && contentDiv.tagName.toLowerCase() === 'tr' && contentDiv.classList.contains('show-more-content') && buttonParentRow && buttonParentRow.tagName.toLowerCase() === 'tr') {
+      let contentDiv = buttonParentRow.querySelector(".show-more-content");
+      if (contentDiv && buttonParentRow && buttonParentRow.tagName.toLowerCase() === 'tr') {
         toggleButton.addEventListener('click', function() {
-          toggleShowMoreButton(toggleButton, contentDiv, buttonParentRow);
+          toggleShowMoreButton(toggleButton, contentDiv);
         });
       } else {
         console.warn('Found a toggle button with no associated toggleable content or parent row');
@@ -240,33 +243,40 @@ export class MembersTable extends BaseTable {
    * @param {number} num_domains - The number of domains the member is assigned to.
    * @param {Array} domain_names - An array of domain names.
    * @param {Array} domain_urls - An array of corresponding domain URLs.
+   * @param {Array} unique_id - A unique row id.
    * @returns {string} - A string of HTML displaying the domains assigned to the member.
    */
-  generateDomainsHTML(num_domains, domain_names, domain_urls, action_url) {
+  generateDomainsHTML(num_domains, domain_names, domain_urls, action_url, unique_id) {
     // Initialize an empty string for the HTML
     let domainsHTML = '';
 
     // Only generate HTML if the member has one or more assigned domains
     
     domainsHTML += "<div class='desktop:grid-col-4 margin-bottom-2 desktop:margin-bottom-0'>";
-    domainsHTML += "<h4 class='font-body-xs margin-y-0'>Domains assigned</h4>";
+    domainsHTML += `<h4 id='domains-assigned--heading-${unique_id}' class='font-body-xs margin-y-0'>Domains assigned</h4>`;
+    domainsHTML += `<section aria-labelledby='domains-assigned--heading-${unique_id}' tabindex='0'>`
     if (num_domains > 0) {
       domainsHTML += `<p class='font-body-xs text-base-darker margin-y-0'>This member is assigned to ${num_domains} domain${num_domains > 1 ? 's' : ''}:</p>`;
-      domainsHTML += "<ul class='usa-list usa-list--unstyled margin-y-0'>";
+      if (num_domains > 1) {
+        domainsHTML += "<ul class='usa-list usa-list--unstyled margin-y-0'>";
 
-      // Display up to 6 domains with their URLs
-      for (let i = 0; i < num_domains && i < 6; i++) {
-        domainsHTML += `<li><a class="font-body-xs" href="${domain_urls[i]}">${domain_names[i]}</a></li>`;
+        // Display up to 6 domains with their URLs
+        for (let i = 0; i < num_domains && i < 6; i++) {
+          domainsHTML += `<li><a class="font-body-xs" href="${domain_urls[i]}">${domain_names[i]}</a></li>`;
+        }
+
+        domainsHTML += "</ul>";
+      } else {
+        // We don't display this in a list for better screenreader support, when only one item exists.
+        domainsHTML += `<a class="font-body-xs" href="${domain_urls[0]}">${domain_names[0]}</a>`;
       }
-
-      domainsHTML += "</ul>";
     } else {
       domainsHTML += `<p class='font-body-xs text-base-darker margin-y-0'>This member is assigned to 0 domains.</p>`;
     }
 
     // If there are more than 6 domains, display a "View assigned domains" link
     domainsHTML += `<p class="font-body-xs"><a href="${action_url}/domains">View domain assignments</a></p>`;
-
+    domainsHTML += "</section>"
     domainsHTML += "</div>";
 
     return domainsHTML;
@@ -365,7 +375,7 @@ export class MembersTable extends BaseTable {
    *        - VIEW_ALL_REQUESTS
    *        - EDIT_MEMBERS
    *        - VIEW_MEMBERS
-   * 
+   * @param {String} unique_id
    * @returns {string} - A string of HTML representing the user's additional permissions.
    *                     If the user has no specific permissions, it returns a default message
    *                     indicating no additional permissions.
@@ -380,51 +390,51 @@ export class MembersTable extends BaseTable {
    * - If no relevant permissions are found, the function returns a message stating that the user has no additional permissions.
    * - The resulting HTML always includes a header "Additional permissions for this member" and appends the relevant permission descriptions.
    */
-  generatePermissionsHTML(is_admin, member_permissions, UserPortfolioPermissionChoices) {
-    let permissionsHTML = '';
-
-    // Define shared classes across elements for easier refactoring
-    let sharedParagraphClasses = "font-body-xs text-base-darker margin-top-1 p--blockquote";
-
-    // Member access
-    if (is_admin) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Member access: <strong>Admin</strong></p>`;
-    } else {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Member access: <strong>Basic</strong></p>`;
-    }
-
-    // Check domain-related permissions
+  generatePermissionsHTML(is_admin, member_permissions, UserPortfolioPermissionChoices, unique_id) {
+    // 1. Role
+    const memberAccessValue = is_admin ? "Admin" : "Basic";
+    
+    // 2. Domain access
+    let domainValue = "No access";
     if (member_permissions.includes(UserPortfolioPermissionChoices.VIEW_ALL_DOMAINS)) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Domains: <strong>Viewer</strong></p>`;
+      domainValue = "Viewer";
     } else if (member_permissions.includes(UserPortfolioPermissionChoices.VIEW_MANAGED_DOMAINS)) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Domains: <strong>Viewer, limited</strong></p>`;
+      domainValue = "Viewer, limited";
     }
-
-    // Check request-related permissions
+    
+    // 3. Request access
+    let requestValue = "No access";
     if (member_permissions.includes(UserPortfolioPermissionChoices.EDIT_REQUESTS)) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Domain requests: <strong>Creator</strong></p>`;
+      requestValue = "Creator";
     } else if (member_permissions.includes(UserPortfolioPermissionChoices.VIEW_ALL_REQUESTS)) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Domain requests: <strong>Viewer</strong></p>`;
-    } else {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Domain requests: <strong>No access</strong></p>`;
+      requestValue = "Viewer";
     }
-
-    // Check member-related permissions
+    
+    // 4. Member access 
+    let memberValue = "No access";
     if (member_permissions.includes(UserPortfolioPermissionChoices.EDIT_MEMBERS)) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Members: <strong>Manager</strong></p>`;
+      memberValue = "Manager";
     } else if (member_permissions.includes(UserPortfolioPermissionChoices.VIEW_MEMBERS)) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Members: <strong>Viewer</strong></p>`;
-    } else {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>Members: <strong>No access</strong></p>`;
+      memberValue = "Viewer";
     }
-
-    // If no specific permissions are assigned, display a message indicating no additional permissions
-    if (!permissionsHTML) {
-      permissionsHTML += `<p class='${sharedParagraphClasses}'>No additional permissions: <strong>There are no additional permissions for this member</strong>.</p>`;
-    }
-
-    // Add a permissions header and wrap the entire output in a container
-    permissionsHTML = `<div class='desktop:grid-col-8'><h4 class='font-body-xs margin-y-0'>Member access and permissions</h4>${permissionsHTML}</div>`;
+    
+    // Helper function for faster element refactoring
+    const createPermissionItem = (label, value) => {
+      return `<p class="font-body-xs text-base-darker margin-top-1 p--blockquote">${label}: <strong>${value}</strong></p>`;
+    };
+    const permissionsHTML = `
+    <div class="desktop:grid-col-8">
+      <h4 id="member-access--heading-${unique_id}" class="font-body-xs margin-y-0">
+        Member access and permissions
+      </h4>
+      <section aria-labelledby="member-access--heading-${unique_id}" tabindex="0">
+        ${createPermissionItem("Member access", memberAccessValue)}
+        ${createPermissionItem("Domains", domainValue)}
+        ${createPermissionItem("Domain requests", requestValue)}
+        ${createPermissionItem("Members", memberValue)}
+      </section>
+    </div>
+    `;
     
     return permissionsHTML;
   }