The Question

A modern smart home interior with ambient lighting and integrated sensors

Most people already live in a building that watches them. The Nest thermostat learns your schedule; the Ring doorbell records everyone who approaches; the Amazon Echo listens for its wake word; the Ecobee sensor tracks whether rooms are occupied. None of this feels remarkable anymore — the first generation of smart home devices has been normalized so successfully that most users have stopped thinking about them. Tens of millions of homes are already continuously monitored — and this is only the first generation.

The second generation is categorically more capable. MIT's CSAIL built RF-Pose, which uses WiFi radio signals — the same frequencies already flooding your home — to track the position and posture of everyone in a building with no camera, detecting falls, tracking breathing and heart rate through walls, and identifying individuals by their gait. Amazon's Echo devices carry a similar radar system that tracks sleep through a pillow or wall. Vayyar Imaging makes a thumbnail-sized radar chip that tracks multiple people, detects falls, monitors vital signs, and maps a building's interior in real time — already deployed in European eldercare facilities.

What the Evidence Shows

The "living building" concept has moved from architectural theory to commercial product in roughly five years. Samsung's SmartThings, now integrated with over 200 million devices, uses AI to learn occupancy patterns and automate responses across dozens of home systems. Apple's HomeKit uses on-device machine learning to anticipate actions from time, location, and past behavior — lights before you reach the switch, temperature before you wake, doors locked on departure. The question is not whether buildings are becoming intelligent, but how intelligent, and who controls that intelligence.

At commercial scale the transformation is further advanced. Alphabet's Sidewalk Labs planned a "smart city" district in Toronto's Quayside before it was cancelled in 2020 over privacy concerns — which only accelerated deployment elsewhere. Buildings in Singapore, Dubai, Amsterdam, and Boston's Seaport now use occupancy-tracking that adjusts HVAC, lighting, and security in real time. Passive House monitoring, built to optimize energy, increasingly carries sensors tracking air quality, CO2, humidity, and occupancy in enough detail to reconstruct a household's routine.

"The building of the future won't just shelter you. It will know when you're sleeping badly, when you're getting sick, when your relationships are stressed. The question is who else it will tell."

— Privacy researcher Dr. Woodrow Hartzog, Northeastern University School of Law

Amazon's Sidewalk network — launched in 2021 and now covering most of the contiguous US — is a low-bandwidth mesh created by Amazon devices that extends connectivity to sensors in garages, gardens, and neighborhoods, with users enrolled by default and opt-out required rather than opt-in. As ambient infrastructure in hundreds of millions of homes, it is in effect a continuous sensing network woven through a nation's built environment — and most whose homes form its nodes are unaware it exists.

"A home that saves energy, predicts maintenance failures, and calls for help when you fall is a good thing. A home that reports everything you do to your insurer, your landlord, and your government is a different thing entirely."

Why This Is Happening

The energy efficiency imperative is driving sensor deployment at scale. Meeting net-zero targets requires buildings to optimize energy with a precision timers and manual controls cannot achieve. Real-time occupancy sensing, predictive heating and cooling, and grid demand-response all require the same dense, continuous monitoring that can track human behavior in intimate detail. The climate argument is genuine; the surveillance capability is simply a by-product of those sensors.

Ageing populations are creating demand for ambient health monitoring. In Japan, South Korea, Germany, and Italy — facing acute demographic crises — a building that monitors elderly occupants for falls and changes in routine is not a privacy concern but a public health solution. Japan alone has over 36 million citizens over 65, many living alone. Radar that detects a fall and summons help without a wearable is a genuine humanitarian technology — and the eldercare case is driving deployment of infrastructure that will then be normalized for general use.

Insurance, real estate, and finance see the data as enormously valuable. The behavioral data a living building generates — time spent at home, which rooms you use and when, your sleep, exercise, and visitors — is exactly the actuarial information insurers have always wanted but never been able to access. A home that verifies exercise habits could justify a lower premium; one that tracks tenant occupancy is useful to landlords. Each creates an incentive to deploy monitoring and harvest data, independent of any benefit to the occupant.

What Could Happen

Living buildings become standard with minimal privacy protection Most likely

Responsive buildings become standard in new construction across the developed world by 2035, driven by efficiency mandates, eldercare demand, and real estate optimization. Regulation lags deployment by 8–12 years, as in every prior tech sector. Home monitoring data flows to insurers, landlords, and government agencies under broad terms residents cannot practically negotiate. Most occupants accept this for lower energy bills, safety, and convenience, without grasping the full scope of what they have consented to.

Strong data sovereignty laws create a two-tier market Possible

The EU's GDPR framework expands to cover building-generated behavioral data, establishing that monitoring a person in their home is inherently sensitive data requiring explicit consent — so living building data cannot be shared with insurers or landlords without it. The US and China develop few equivalent protections, splitting the global market between jurisdictions with strong data rights and those without. Premium EU housing incorporates the technology with genuine data sovereignty; housing elsewhere operates as continuous commercial surveillance.

Public backlash leads to meaningful opt-out rights Less likely

A high-profile incident — an insurer using home monitoring data to deny a claim, a landlord evicting a tenant on behavioral data, or police accessing home sensor records without a warrant — triggers enough public outrage to produce a meaningful legislative response. Strong opt-out rights are established across major markets, and buildings must disclose all data collection in plain language. The technology keeps deploying, but with genuine informed consent that substantially changes how data flows from home to corporate and government entities.

Our Assessment
We assign 68% probability — likely that intelligently responsive buildings — tracking occupancy, health signals, and behavioral patterns in real time — become standard in new residential construction within a decade. The technology is already commercially deployed, regulatory frameworks are insufficient, and the commercial, demographic, and environmental incentives are substantial and converging. The critical variable is whether data protection frameworks arrive before widespread deployment normalizes the status quo — because once living buildings are standard, retrofitting privacy protections becomes exponentially harder.

What Can We Do

A person reviewing smart home privacy settings on a phone

The living building is coming. Whether it serves its occupants or surveils them — whether its data enriches the people who live in it or the corporations that insure, rent, and finance it — depends on decisions being made now, before the infrastructure is built and the norms are set.

Audit what your home is already doing. Most people with Nest, Ring, Ecobee, Amazon Echo, or Google Home devices have consented — in terms of service they did not read — to data collection well beyond what they intend. Before the second generation arrives, understanding what the first is already doing is a prerequisite. The EFF's "Smart Home Privacy" guide and Mozilla's "Privacy Not Included" database are accessible starting points.

Opt out of ambient data networks actively, not passively. Amazon Sidewalk, Apple HomeKit Secure Router features, and Google Home's cross-device sharing are active by default and require deliberate action to disable. The defaults maximize data collection, and changing them means navigating settings not designed to be found. An hour auditing your devices is more impactful than any legislative advocacy.

Demand data portability and deletion rights from building managers. If you rent, your landlord may already be collecting occupancy and behavioral data from smart building systems. In many jurisdictions you can request what has been collected, receive a copy, and demand deletion — and exercising these rights, even when inconvenient, pressures operators to take data governance seriously and sets precedents protecting all residents.

Engage with smart city planning in your community. Deploying smart building infrastructure in public housing, transit hubs, and commercial districts is a planning and zoning decision subject, in principle, to public input — but in practice often made without it. Attending planning meetings, responding to consultations, and supporting privacy-by-design advocacy are concrete ways to shape how this technology is deployed.

Sources
  • MIT CSAIL — RF-Pose: WiFi-based human pose tracking research (2023)
  • Amazon — Echo radar sleep tracking product documentation
  • Vayyar Imaging — Radar sensing platform specifications (2024)
  • Electronic Frontier Foundation — "Amazon Sidewalk: What You Need to Know" (2021)
  • Sidewalk Labs — Quayside Toronto project documentation and cancellation statement
  • Forecast The World Research Desk — 800+ data sources