# Real Estate Software Development | CRM, Portals, Proptech | Alher Tech > Custom real estate software: agency CRMs, property portals, MLS integrations, building management. Idealista, Fotocasa, WhatsApp, virtual tours. - Canonical page: https://alhertech.com/en/industries/real-estate-software/ - Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/) - Contact: https://alhertech.com/en/contact/ --- Custom CRMs, portals and proptech tools for agencies and property managers: Idealista and Fotocasa feeds, WhatsApp lead capture, virtual tours and a CRM agents will actually open. ## What Real Estate Software Delivers - **A CRM built for how agents actually work**: Real estate buyers split into three: agencies fed up with paying €200/month per seat for a portal CRM that does not match their workflow; building managers and property managers running on Excel and email; and proptech founders building marketplaces, valuation tools or short-let platforms. The common thread is that the off-the-shelf SaaS (Inmovilla, Witei, Salesforce Real Estate Cloud, AppFolio) covers 60% of what they need and the rest is enough friction to lose deals. We build the missing 40% as software they own, plug it into the portals they live on, and stop the leak. - **Portal feeds done properly**: We push to Idealista, Fotocasa, Pisos.com, Habitaclia, Yaencontre and the international portals (Rightmove, Zillow, Realtor.com) using their feed specs: XML for Idealista, BR for Fotocasa, RETS / RESO Web API for US MLS. Listings stay in sync, photos resize correctly, and price changes propagate in minutes, not days. - **WhatsApp Business with real automation**: Official Cloud API integration, template messages approved by Meta, automated qualification of incoming leads, AI-drafted replies an agent confirms with one tap. We have measured 3x more leads contacted within 5 minutes vs. teams using the Idealista contact form alone. - **Virtual tours and media that load fast**: Matterport and Kuula embeds, 360 photo galleries, drone video, all served through a CDN with proper image transforms (WebP, AVIF) so the property page loads under 2s on mobile. Buyers leave slow listings; the photos are the funnel. - **Cadastre and registry data without manual lookup**: Direct integration with the Spanish Catastro for property data, surface area validation, polygon boundaries on the map. For US clients, county assessor APIs and parcel-level GIS data. Saves agents 30 minutes per listing and removes typos that produce legal complaints later. - **Building management that owners and tenants both use**: For property managers and administradores de fincas: incident tickets with photo and video, owner meetings online with electronic voting valid under the Ley de Propiedad Horizontal, accounting that reconciles automatically with bank feeds, and a tenant portal that does not require a manual. ## How We Build Your Real Estate Software - **Listing-to-close workflow audit**: We shadow agents, listen to the WhatsApp conversations they actually have, and time how long the same property's data takes to reach every portal. The friction is always more than people think. - **Property data model design**: We define the canonical property schema (residential, commercial, land, holiday let) so portal feeds map cleanly and downstream tools (valuations, MLS, finance) never need a one-off transform. - **CRM and inbox build**: Pipeline boards, lead scoring, multi-channel inbox (WhatsApp, email, portal forms, phone calls). Mobile-first by default: desktop is a side view, not the main one. - **Portal feeds and integrations**: We sync to the portals in your subscription stack, including the ones with weird quirks (Idealista's required photos count, Fotocasa's BR XML quirks). We also build a public website if your brand needs one. - **Pilot with one office**: We pilot with the team most willing to give feedback, run two weeks in parallel with the legacy CRM, then roll out across offices. - **Continuous tuning post-launch**: New portals come and go. WhatsApp templates expire. Property regulation changes. We keep the CRM alive with a lightweight retainer rather than walking away after delivery. ## High-performance stack used by global leaders React/Next.js/Angular on the frontend and Java 21 + Spring Boot + PostgreSQL 14 on the backend: the same stack that BBVA, ING, and Netflix use for their security and performance. ## Real Estate Software: FAQ ### How much does it cost to build a real estate software product? A focused agency CRM with portal feeds and WhatsApp runs €30,000-€70,000. A full agency platform with public website, CRM, mobile app and back-office is €80,000-€180,000. A proptech marketplace or SaaS for multiple agencies typically starts at €120,000. Building management platforms range €60,000-€150,000 depending on accounting depth. ### How long does implementation take? A first usable CRM in 8 weeks. Full agency platform in 4-6 months. Building management with accounting reconciliation, 5-7 months because the bank feed integration and the legal templates take time. ### Are you familiar with real estate regulations? For Spain we work with the Ley de Arrendamientos Urbanos, Ley de Propiedad Horizontal, the Catastro and Registro de la Propiedad data flows, and the recent housing law (Ley 12/2023) regarding stressed-rent areas. For the US, RESPA, fair housing rules and state-level licence handling. We are not lawyers, but we ship software that respects what your lawyers tell us. ### Can you integrate with Idealista, Fotocasa or US MLS? Yes. Idealista (XML feed and Lead API), Fotocasa (BR XML), Pisos.com, Habitaclia, Yaencontre. For the US we work with RESO Web API and RETS feeds across most major MLS regions. Internationally, Rightmove, Zillow and Realtor.com via partner ingestion. We also handle the back-channel for lead reception so messages route into the CRM, not into a portal-locked inbox. ### How do you handle data residency and lead privacy? EU data stays in EU regions. We design the CRM around RGPD basics: purpose limitation, retention windows, easy data subject access response, granular consent on marketing channels (especially WhatsApp). We also wire LSSI compliance for any commercial communication. ### Can you build virtual tour tooling? We do not compete with Matterport, but we integrate with it deeply: embedded in the listing page, embedded in WhatsApp shares, lead-gated when the listing is exclusive. We also build cheaper alternatives using Pannellum or Marzipano for 360 photo tours when budget is tight. ### What about valuations and AVMs? We have built AVMs trained on Catastro data, idealista historic asking prices and notary actual sale prices (when scrapable from the Colegio Notarial bulletins). The model is never a substitute for a registered valuator under Orden ECO/805/2003 or RICS, but it gives the agent a strong starting price in seconds. ### Do you handle holiday rental specifics? Yes. Channel manager integration with Booking.com, Airbnb (Channel Partner), Vrbo. Tourism registry numbers per region (VFT in Andalucía, HUTB in Catalunya, VV in Madrid). Police guest reporting for the Hospederías system in Spain. Dynamic pricing tied to occupancy and event calendars. ### Do you work with clients globally? Yes. We work fully remote with clients across Spain, Europe, the US and LATAM. Time zones, video calls and live demos at every milestone.