# Mi Parcelita > Web app for studying what fits on a plot in Spain: open it by its cadastral reference, place houses, pools and trees in 2D and 3D on the real terrain and aerial photo, and check coverage, floor-area ratio, setbacks and sun hours. Spanish first (es-ES), with an English version. Runs in the browser; the URL is https://miparcelita.es/. Mi Parcelita (https://miparcelita.es/) es una aplicación web en español para ver una parcela de España por su referencia catastral y diseñar sobre ella en 2D y 3D: casa, piscina, garaje, árboles. Calcula ocupación, edificabilidad y retranqueos, y muestra el sol y las sombras reales. Key concepts: - **Referencia catastral** (cadastral reference): the official ID of a property in the Spanish Cadastre; 14 characters for a plot, 20 for a property (e.g. 3294035QA5239S). Typing it into the app loads the plot's official outline from the Catastro's INSPIRE service. - **Edificabilidad** (floor-area ratio): total built floor area allowed, in m² of floor per m² of land. The app adds footprint × floors of roofed buildings (carports and pergolas at 50%) plus the official floor area of existing buildings. - **Ocupación** (coverage): share of the plot covered by the footprint of roofed buildings, new and existing. - **Retranqueo** (setback): minimum distance from buildings to the plot boundaries; the app draws it and flags buildings (and optionally pools) inside it. - **Horas de sol** (sun hours): the app's sun-hours map gives hours of direct sun on every part of the plot for a chosen day, shaded by buildings, trees, neighbouring buildings and terrain (IGN MDT05/MDT25), e.g. to decide where a pool should go. - **Límites municipales**: the user enters the municipality's maximum floor-area ratio, coverage, height and floors; the app checks the plan against them. It does not know local planning rules by itself. Data sources: Spanish Cadastre (INSPIRE parcels, buildings, addresses), IGN (PNOA orthophoto, MDT05 and MDT25 terrain models), OpenStreetMap. Figures are indicative; it is a tool for early studies, not a substitute for an architect's project or municipal rules. ## Páginas (español) - [Abrir la app](https://miparcelita.es/): Ve tu parcela por referencia catastral, coloca la casa, la piscina y los árboles en 3D sobre el terreno real y calcula ocupación, edificabilidad, retranqueos y horas de sol. Gratis, en el navegador. - [Cómo funciona Mi Parcelita](https://miparcelita.es/como-funciona/): Paso a paso: busca tu parcela por referencia catastral, ábrela en 3D sobre el terreno real, coloca la casa y la piscina, fija retranqueos y límites y estudia el sol. - [Preguntas frecuentes](https://miparcelita.es/preguntas-frecuentes/): Referencia catastral, edificabilidad, ocupación, retranqueos, sol y piscina: respuestas sobre cómo funciona Mi Parcelita y qué calcula. - [Guía de la parcela: referencia catastral, retranqueos, ocupación, edificabilidad y sol](https://miparcelita.es/guia-parcela/): Qué es la referencia catastral y dónde encontrarla, qué son el retranqueo, la ocupación y la edificabilidad, cómo se calculan y cómo orientar la casa y la piscina al sol. - [Aviso legal](https://miparcelita.es/aviso-legal/): Quién está detrás de Mi Parcelita: Gorila Digital, S.L., sus datos de contacto y registro, las condiciones de uso del sitio y la propiedad intelectual. - [Política de privacidad](https://miparcelita.es/privacidad/): Qué datos personales trata Mi Parcelita (cuenta, suscripción Pro, uso de la IA, analítica sin cookies), para qué, con qué base legal, cuánto tiempo y tus derechos. - [Condiciones de uso y de Mi Parcelita Pro](https://miparcelita.es/condiciones/): Condiciones de la cuenta, las propuestas gratuitas de IA y la suscripción Mi Parcelita Pro: precio con IVA, renovación, cancelación, desistimiento y responsabilidad. - [Política de cookies](https://miparcelita.es/cookies/): Mi Parcelita no usa cookies de seguimiento ni de publicidad. Qué guarda en tu navegador (el plano, el idioma y la sesión) y por qué no necesita aviso de cookies. ## Pages (English) - [Open the app](https://miparcelita.es/en/): Look up a plot in Spain by its cadastral reference, place the house, pool and trees in 3D on the real terrain, and check coverage, floor-area ratio, setbacks and sun hours. Free, in your browser. - [How Mi Parcelita works](https://miparcelita.es/en/how-it-works/): Step by step: find your plot in Spain by cadastral reference, open it in 3D on the real terrain, place the house and pool, set setbacks and limits, and study the sun. - [Frequently asked questions](https://miparcelita.es/en/faq/): Cadastral reference, floor-area ratio, coverage, setbacks, sun and pools: answers about how Mi Parcelita works and what it calculates. - [Plot guide: cadastral reference, setbacks, coverage, floor-area ratio and sun](https://miparcelita.es/en/plot-guide/): What a Spanish cadastral reference is and where to find it, what setbacks, coverage and floor-area ratio mean, how they are calculated, and how to place the house and pool for the sun. - [Legal notice](https://miparcelita.es/en/legal-notice/): Who is behind Mi Parcelita: Gorila Digital, S.L., its contact and registration details, the terms of use of the website and intellectual property. - [Privacy policy](https://miparcelita.es/en/privacy/): What personal data Mi Parcelita processes (account, Pro subscription, AI usage, cookie-less analytics), why, on what legal basis, for how long, and your rights. - [Terms of use and of Mi Parcelita Pro](https://miparcelita.es/en/terms/): Terms for the Mi Parcelita account, the free AI layouts and the Mi Parcelita Pro subscription: price with VAT, renewal, cancellation, withdrawal and liability. - [Cookie policy](https://miparcelita.es/en/cookies/): Mi Parcelita uses no tracking or advertising cookies. What it keeps in your browser (your plan, language and session) and why it needs no cookie banner. ## Optional - [Full text of these pages](https://miparcelita.es/llms-full.txt): every page above in one Markdown file. - [Sitemap](https://miparcelita.es/sitemap.xml)