Smart Home Planning Software

CinemaConfig
Truly free18 free home-theater calculators including speaker layout, seating/riser and acoustics tools.

NetPlan
Truly freeFree with no account needed to build; sign-in only to save plans to the cloud.

Plexus Network Planner
Truly freeFree and open-source; runs entirely in the browser or offline with no account or backend.

Smart Home Builder
Truly freeFree browser configurator that builds room-by-room device kits with compatibility checks.

Audio Advice Home Theater Designer
Free, with limitsFree patented 3D designer; saving designs and getting full measurements ties into Audio Advice product picks.

Dreamedia 3D Home Theater Design Tool
Free, with limitsFree in-browser 3D theater builder; final design nudges toward a Dreamedia expert consult.

Hamina Planner
Free, with limitsFree Lite tier is cross-vendor but caps you at 3 access points per design.

KNX ETS Home
Free, with limitsETS Lite is free for 3 months after a free eCampus course (or 20 products); ETS Home is a paid one-time license.

TheaterCalc
Free, with limits11 free home-theater calculators including a visual room layout planner; a paid Blueprint guide is upsold.

WiFi Heatmap
Free, with limitsFree for up to 5 APs on one floor with no signup, but PNG export is watermarked.

LOXONE Config
Free, brand-lockedFree forever with no license fees, but it programs Loxone Miniserver-based automation only.

Omada Design Hub
Free, brand-lockedFree planner with AI auto-wall and auto-AP placement, but device library is TP-Link Omada gear.

Ring Security Builder
Free, brand-lockedFree self-serve quiz that recommends a Ring product layout, but limited to Ring's own catalog.

UniFi Design Center
Free, brand-lockedFully free, license-free browser tool but only places Ubiquiti UniFi APs, cameras and switches.
What to look for in smart home planning software
Smart home design software helps you plan a connected home before construction or a remodel, by placing devices, lighting, structured wiring, networking and automation onto a floor plan so nothing is forgotten while the walls are open. Some tools are general floor-plan and electrical-layout apps used for device placement; others are purpose-built low-voltage and home-automation planners with device libraries, wiring schedules and system documentation. This directory compares them by floor-plan support, device and wiring libraries, export formats for installers, plus pricing and platform support, so you can plan a system that is wired right the first time.
Plans onto a real floor plan. Smart home planning is spatial. Tools that place devices, switches and drops onto your actual floor plan catch coverage and wiring gaps early.
Wiring and low-voltage layout. Structured wiring, network drops and power need planning before drywall. Look for tools that map cable runs and produce wiring schedules.
Device and product libraries. Libraries of cameras, access points, switches and lighting let you plan with real coverage and spacing rather than guesses.
Lighting and automation scenes. Some tools plan smart lighting zones and automation scenes, which helps size circuits and place controls sensibly.
Documentation for installers. A plan is only useful if an integrator can build from it. Tools that export schedules, legends and labeled drawings reduce on-site mistakes.
Export and sharing. Exporting plans and device lists helps when collecting installer quotes or coordinating with a builder.
Questions, answered
Is there free smart home design software?
Yes, but read the fine print. Some general floor-plan and electrical tools have free tiers usable for device placement, often with limits on exports or project size. Dedicated low-voltage planners are usually paid or trade-focused.
Can these tools plan wiring and network drops?
Purpose-built low-voltage planners map structured wiring, network drops and produce wiring schedules; general floor-plan tools mainly mark device locations. The comparison flags which handle full wiring layout.
Do I need this if I just want smart plugs and bulbs?
For plug-in devices, no. Planning software earns its keep when you are pre-wiring during construction or a remodel, where decisions are hard to change once walls close.
Will the output work for my installer or integrator?
Many tools export plans, device lists and wiring schedules an integrator can quote and build from. Confirm your installer accepts the file formats the tool produces before committing.