3917 Balcones, Austin, TX 78731 | Col Realty  <div id="share-modal" class="share-modal-overlay" onclick="if(event.target===this)closeShare()"> <div class="share-modal-box"> <button class="share-modal-close" onclick="closeShare()">×</button> <h3 class="share-modal-title">Share this home</h3> <p id="share-modal-address" class="share-modal-address"></p> <div class="share-options"> <button class="share-opt" onclick="shareVia('copy')"><span class="share-opt-icon">🔗</span><span>Copy link</span></button> <button class="share-opt" onclick="shareVia('email')"><span class="share-opt-icon">✉️</span><span>Email</span></button> <button class="share-opt" onclick="shareVia('text')"><span class="share-opt-icon">💬</span><span>Text</span></button> <button class="share-opt" onclick="shareVia('facebook')"><span class="share-opt-icon" style="background:#1877f2;color:#fff;border-radius:50%;font-weight:700;font-size:16px;">f</span><span>Facebook</span></button> <button class="share-opt" onclick="shareVia('twitter')"><span class="share-opt-icon" style="background:#000;color:#fff;border-radius:50%;font-size:14px;font-weight:700;">𝕏</span><span>X / Twitter</span></button> <button class="share-opt" onclick="shareVia('whatsapp')"><span class="share-opt-icon">📱</span><span>WhatsApp</span></button> </div> <div id="share-copy-confirm" class="share-copy-confirm" style="display:none;">✅ Link copied to clipboard!</div> </div> </div> <script> const IS_AUTHENTICATED = false; // ── Favorites ────────────────────────────────────────────────────── function handleFavorite(btn, listingId) { if (!IS_AUTHENTICATED) { const modal = document.getElementById('login-modal'); if (modal) modal.style.display = 'flex'; return; } fetch('/accounts/favorite/' + listingId + '/', { method: 'POST', headers: { 'X-CSRFToken': 'eT1M4wH2ALV5doyLsQ14pviM2YoiNqtZGqZRk1mQkUaXleJWYLV6hXVd9NE4EOt0', 'Content-Type': 'application/json' } }) .then(r => r.json()) .then(data => { const saved = data.status === 'added'; btn.classList.toggle('saved', saved); const svg = btn.querySelector('svg'); svg.setAttribute('fill', saved ? '#e02020' : 'none'); svg.setAttribute('stroke', saved ? '#e02020' : 'currentColor'); }); } // ── Sticky nav: show Save/Share when topbar scrolls away ────────── document.addEventListener('DOMContentLoaded', function() { const topbar = document.querySelector('.cr-topbar'); const navActions = document.getElementById('cr-nav-actions'); if (topbar && navActions) { const observer = new IntersectionObserver(function(entries) { entries.forEach(function(entry) { if (!entry.isIntersecting) { navActions.classList.add('visible'); } else { navActions.classList.remove('visible'); } }); }, { threshold: 0, rootMargin: '-80px 0px 0px 0px' }); observer.observe(topbar); } // Sync favorite state between topbar btn and nav btn const topFav = document.getElementById('detail-fav-btn'); const navFav = document.getElementById('nav-fav-btn'); if (topFav && navFav) { const origHandle = topFav.onclick; topFav.onclick = function(e) { handleFavorite(topFav, topFav.dataset.id || topFav.getAttribute('onclick').match(/\d+/)?.[0]); }; // Keep nav fav in sync when topbar fav changes const syncFav = function(mutations) { navFav.className = topFav.className; const svg = topFav.querySelector('svg'); const navSvg = navFav.querySelector('svg'); if (svg && navSvg) { navSvg.setAttribute('fill', svg.getAttribute('fill')); navSvg.setAttribute('stroke', svg.getAttribute('stroke')); } }; new MutationObserver(syncFav).observe(topFav, { attributes: true, subtree: true, attributeFilter: ['class', 'fill', 'stroke'] }); } // Section nav active link on scroll const sections = document.querySelectorAll('[id]'); const navLinks = document.querySelectorAll('.cr-nav a'); const navWrapH = 80 + (document.querySelector('.cr-nav-wrap')?.offsetHeight || 48); window.addEventListener('scroll', function() { let current = ''; sections.forEach(function(sec) { if (window.scrollY >= sec.offsetTop - navWrapH - 20) { current = sec.id; } }); navLinks.forEach(function(a) { a.classList.remove('active'); if (a.getAttribute('href') === '#' + current) a.classList.add('active'); }); }, { passive: true }); }); // ── Share ────────────────────────────────────────────────────────── let _shareUrl = '', _shareAddress = ''; function openShare(address, path) { _shareAddress = address; _shareUrl = window.location.origin + path; document.getElementById('share-modal-address').textContent = address; document.getElementById('share-copy-confirm').style.display = 'none'; document.getElementById('share-modal').style.display = 'flex'; } function closeShare() { document.getElementById('share-modal').style.display = 'none'; } function shareVia(method) { const url = encodeURIComponent(_shareUrl); const text = encodeURIComponent('Check out this home: ' + _shareAddress); if (method === 'copy') { navigator.clipboard.writeText(_shareUrl).then(() => { document.getElementById('share-copy-confirm').style.display='block'; setTimeout(()=>document.getElementById('share-copy-confirm').style.display='none',2500); }); } else if (method === 'email') { window.open('mailto:?subject=Check out this home&body=' + text + '%0A' + url); } else if (method === 'text') { window.open('sms:?body=' + text + '%20' + url); } else if (method === 'facebook') { window.open('https://www.facebook.com/sharer/sharer.php?u=' + url, '_blank'); } else if (method === 'twitter') { window.open('https://twitter.com/intent/tweet?text=' + text + '&url=' + url, '_blank'); } else if (method === 'whatsapp') { window.open('https://wa.me/?text=' + text + '%20' + url, '

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Description

Stately Balcones Drive is one of Austin’s most beloved streets—and now you have the rare opportunity to own over half an acre backing to Camp Mabry. Bring your architect and imagination to re-envision what the next chapter of 3917 Balcones Drive could be. Whether you dream of a modern masterpiece or a timeless estate, this property offers the perfect canvas in one of Austin’s most prestigious locations.