baseray is a building database for sales, solar, construction and insurance teams. It holds one record per building in Romania and Czechia: its shape, height, use, roof, existing solar panels, local climate and the companies registered at its address. You filter the buildings you want, check each one and export the list.

Which countries does baseray cover?

Romania and Czechia are live, with every building on the map. Germany, Greece, Croatia, Bulgaria, Hungary, Poland, Slovenia and Moldova are on the way.

What does a building record contain?

Footprint area, outline length and width, height, volume, floors and category; the declared use, built area, construction year and cadastral number where the register has them; existing solar panels and, where the roof has been modelled, the panel count, capacity and yearly yield; the local climate and gas network; and the companies registered at the address.

How do I find buildings without solar panels?

Filter existing solar panels on “None seen”. A baseray model reads dated aerial photos of each roof and returns detected, none seen or unclear, with the date of the photo, so you know how recent the check is. Roofs the model has not read yet show as not checked.

Can I see which companies are registered at a building?

Yes. baseray links a company to a building only when the company’s registered office is the building’s exact official address in the national business register. It is shown as a registered office, never as ownership or occupancy.

Are building heights measured or estimated?

Each height says which. It is measured, derived from a model, worked out from the number of floors, or a default for the building category. Estimates carry a tilde, for example ~18.0 m, and the volume computed from them carries it too.

How do I get the buildings into my CRM?

Export any list as CSV with Clay-ready columns, share lead lists with your team, or query the API with an API key from your workspace settings. The API returns the same fields as the app and sets total_is_capped when an area holds more results than one query counts.

Solar and heat-pump installers looking for roofs and heat loads, B2B sales teams prospecting the companies registered in large buildings, and construction and insurance teams that need checked building facts.

How current is the data?

The data is refreshed whenever the underlying national data is updated. The figures on this page come from the baseray snapshot of 25 Sep 2026 and from records read in the live app that day.

The building database for Romania and Czechia.

Find buildings by size, height, use and roof. Check each one’s register record, existing solar panels and the company registered at its address, then export the list as CSV or pull it through the API.

Book a demo Open the live map

Leads 3,224 Floreasca, București Sort by

Columns Export CSV

Building

Live in Romania and Czechia. Eight more European countries are on the way.

Live

RORomania
CZCzechia

Coming soon

DEGermany
GRGreece
HRCroatia
BGBulgaria
HUHungary
PLPoland
SISlovenia
MDMoldova

What a building lead holds. The register record, the shape and the company registered at the address, in one row.

Register recordBulevardul 15 Noiembrie 78, Brașov

Declared use: Servicii publice
Floors above ground: 16
Built area (m²): 35,137
Construction year: 2022
Cadastral number: 164176-C1

Outlines overlap 88% · read 24 Sep 2026

The register record

Declared use, floors, built area, construction year and cadastral number for each building, joined to its footprint.

Strada Barbu Văcărescu 201București · Commercial

Footprint (m²): 1,312
Height: 137.0 m
Volume (m³): 179,744

Strada George Constantinescu 8București · Commercial

Footprint (m²): 8,383
Height: ~21.6 m
Volume (m³): ~181,073

The shape

Footprint, height and volume from the building’s own outline. Every height says whether it was measured or estimated, so an estimate never passes for a measurement.

Registered-office matchesFloreasca, București

Calea Floreasca 246b

Registered office

Strada George Constantinescu 8

Registered office

Strada Gara Herăstrău 4

Registered office

Bulevardul Lacul Tei 109

Registered office

Șoseaua Colentina 1

Registered office

Șoseaua Nicolae Titulescu 10

Registered office

The company at the address

Companies whose registered office is the building’s exact official address. Shown as a registered office, never as ownership.

16,559,868 buildings.

In Romania and Czechia. Every building on one map, with its register record, its roof and the companies registered at its address.

Romania at night: a sample of its buildings as points of light — Each point is a real building, drawn from a 2.5% random sample of the baseray snapshots: Romania 25 Sep 2026 and Czechia 7 Oct 2026.

Filter by what you can verify.

Each filter is a fact you can check, from the declared use to the company registered at the address.

Commercial
Industrial
Registered office at the address

Bucharest, with commercial and industrial buildings highlighted — Bucharest and Ilfov, from the same 2.5% sample. Highlighted points pass the filters above.

Rank them by size.

404 of 9,582 buildings in Floreasca pass the filters. Ranked by volume, the largest comes first.

Floreasca in 3D, with the three largest matching buildings numbered — Floreasca, Bucharest. 9,582 real footprints at their recorded heights, from the baseray snapshot of 25 Sep 2026.

Open the record.

Footprint, height, volume and solar panels in one record.

Calea Floreasca 246b highlighted — Calea Floreasca 246b, Bucharest. Record from the baseray snapshot of 25 Sep 2026.

See the company registered at the address.

Linked only when its registered office is the building’s exact official address.

Calea Floreasca 246b with its registered office marked — Calea Floreasca 246b, Bucharest. Record from the baseray snapshot of 25 Sep 2026.

One record per building. Geometry, register facts, local climate and gas network in one place.

Geometry

Footprint, outline, height and volume. Values from a model carry a tilde, so an estimate never passes for a measurement.

Register facts

Declared use, floors, built area, construction year and cadastral number, matched to the footprint by how much the outlines overlap.

Local climate

Extremes, frost days and rainfall for the building's location, the inputs behind heat-demand estimates.

Gas network

Evidence at five levels, from the locality down to the building. Proximity is never claimed as a connection.

Record read from the live app: Bulevardul 15 Noiembrie 78, Brașov.

Find rooftop solar leads in four steps. From a filter to a phone call, in one workspace.

Segment builderRomania · snapshot of 25 Sep 2026

Category

CommercialIndustrialPublic

Footprint

Any≥ 250 m²≥ 1,000 m²

Existing solar panels

DetectedNone seenUnclear

Matching buildings3,464

Step 1: Filter

Commercial and industrial buildings over 1,000 m² whose roofs were checked and show no panels.
Existing panelsBulevardul 15 Noiembrie 78, Brașov

Verdict

None seen

Photo date

8 Sept 2022

Model confidence

0.988

Verdicts in central Focșani9,733 buildings

None seen

2,635

Detected

66

Step 2: Check the photo

A baseray model reads dated aerial photos and returns detected, none seen or unclear, with the photo date.
Roof analysisBulevardul Timișoara 32, București

Max panels

224

Capacity (kWp)

89.6

Yearly energy (kWh)

108,025

Usable roof (m²)

439.8

CO₂ avoided (kg a year)

25,278

Confidence0.95

Step 3: Size the roof

Where the roof has been modelled, you get the panel count, the capacity and the yearly yield.
Strada Mare a Unirii 35Focșani · Commercial

Footprint (m²)

8,418

Height

15.4 m

Measured

Floors

4

Existing solar panels

None seen

Registered office

Matched

Exact official address site

Registered office

Step 4: Call the company

Companies are matched only through the exact official address. A registered office is not ownership.

A heat card for every building. Start from the footprint, height and volume, add the local climate normal, and get the figures you size a heat pump with.

BuildingStrada Grigore Moisil 5, București

Footprint (m²): 1,421
Height (m): 33.0 · measured
Floors: 11
Gross volume (m³): 46,893
Category: Apartment block

ClimatePer location

Climate normal: 1991–2020
Heating degree-days: SR 4839
Design temperature: °C

Heat cardComputed per building

Annual heating demand: kWh / year
Peak heat load: kW
Heat-pump electricity: kWh / year
Thermal assessment: per building

This page shows the output fields only. The live app computes the values for each building.

Building data API and CSV export. Query an area and get the same rows you see in the app, as JSON.

Workspace API keys, created in the app
CSV export with Clay-ready columns
Lead lists shared with your team
total_is_capped tells you when to narrow the box

Read the API reference

Request

curl "https://api.baseray.ai/v1/buildings?bbox=26.08,44.45,26.12,44.48&sort=volume&limit=25&offset=0&category=commercial,industrial&existing_solar_panels=detected" \
  -H "Authorization: Bearer $BASERAY_API_KEY"

const response = await fetch("https://api.baseray.ai/v1/buildings?bbox=26.08,44.45,26.12,44.48&sort=volume&limit=25&offset=0&category=commercial,industrial&existing_solar_panels=detected", {
  method: "GET",
  headers: { Authorization: `Bearer ${process.env.BASERAY_API_KEY}` },
});
const result = await response.json();

import os
import requests

response = requests.get(
    "https://api.baseray.ai/v1/buildings",
    params={"bbox": "26.08,44.45,26.12,44.48", "sort": "volume", "limit": "25", "offset": "0", "category": "commercial,industrial", "existing_solar_panels": "detected"},
    headers={"Authorization": f"Bearer {os.environ['BASERAY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
result = response.json()

Response

{
  "data": [
    {
      "building_id": "c9eefd1b-8c8d-48fe-8b72-e015374d7720",
      "address": "Bulevardul 15 Noiembrie 78",
      "locality": "Brașov",
      "country": "RO",
      "latitude": 45.64988,
      "longitude": 25.61044,
      "category": "commercial",
      "footprint_area_m2": 31252,
      "height": {
        "metres": 18,
        "basis": "estimated"
      },
      "volume_m3": 562531,
      "volume_basis": "estimated",
      "floors": 16,
      "existing_solar_panels": {
        "status": "none_seen",
        "photo_date": "2022-09-08",
        "confidence": 0.988
      },
      "solar_potential": null,
      "registered_business_count": 0,
      "app_url": "https://app.baseray.ai/buildings/c9eefd1b-8c8d-48fe-8b72-e015374d7720"
    }
  ],
  "meta": {
    "total": 1,
    "total_is_capped": false,
    "limit": 25,
    "offset": 0,
    "sort": "volume"
  },
  "links": {
    "next": null
  }
}

Questions about baseray. Coverage, data, accuracy and export.

What is baseray?: baseray is a building database for sales, solar, construction and insurance teams. It holds one record per building in Romania and Czechia: its shape, height, use, roof, existing solar panels, local climate and the companies registered at its address. You filter the buildings you want, check each one and export the list.
Which countries does baseray cover?: Romania and Czechia are live, with every building on the map. Germany, Greece, Croatia, Bulgaria, Hungary, Poland, Slovenia and Moldova are on the way.
What does a building record contain?: Footprint area, outline length and width, height, volume, floors and category; the declared use, built area, construction year and cadastral number where the register has them; existing solar panels and, where the roof has been modelled, the panel count, capacity and yearly yield; the local climate and gas network; and the companies registered at the address.
How do I find buildings without solar panels?: Filter existing solar panels on “None seen”. A baseray model reads dated aerial photos of each roof and returns detected, none seen or unclear, with the date of the photo, so you know how recent the check is. Roofs the model has not read yet show as not checked.
Can I see which companies are registered at a building?: Yes. baseray links a company to a building only when the company’s registered office is the building’s exact official address in the national business register. It is shown as a registered office, never as ownership or occupancy.
Are building heights measured or estimated?: Each height says which. It is measured, derived from a model, worked out from the number of floors, or a default for the building category. Estimates carry a tilde, for example ~18.0 m, and the volume computed from them carries it too.
How do I get the buildings into my CRM?: Export any list as CSV with Clay-ready columns, share lead lists with your team, or query the API with an API key from your workspace settings. The API returns the same fields as the app and sets total_is_capped when an area holds more results than one query counts.
Who is baseray for?: Solar and heat-pump installers looking for roofs and heat loads, B2B sales teams prospecting the companies registered in large buildings, and construction and insurance teams that need checked building facts.
How current is the data?: The data is refreshed whenever the underlying national data is updated. The figures on this page come from the baseray snapshot of 25 Sep 2026 and from records read in the live app that day.

Bring baseray to your territory. Tell us your regions and what you sell. We load the data and build your first segments with you.

Book a demo Open the live map

The building database for Romania and Czechia.

Live in Romania and Czechia. Eight more European countries are on the way.

What a building lead holds. The register record, the shape and the company registered at the address, in one row.

The register record

The shape

The company at the address

16,559,868 buildings.

Filter by what you can verify.

Rank them by size.

Open the record.

See the company registered at the address.

16,559,868 buildings.

Filter by what you can verify.

Rank them by size.

Open the record.

See the company registered at the address.

One record per building. Geometry, register facts, local climate and gas network in one place.

Geometry

Register facts

Local climate

Gas network

Find rooftop solar leads in four steps. From a filter to a phone call, in one workspace.

Step 1: Filter

Step 2: Check the photo

Step 3: Size the roof

Step 4: Call the company

A heat card for every building. Start from the footprint, height and volume, add the local climate normal, and get the figures you size a heat pump with.

Building data API and CSV export. Query an area and get the same rows you see in the app, as JSON.

Questions about baseray. Coverage, data, accuracy and export.

What is baseray?

Which countries does baseray cover?

What does a building record contain?

How do I find buildings without solar panels?

Can I see which companies are registered at a building?

Are building heights measured or estimated?

How do I get the buildings into my CRM?

Who is baseray for?

How current is the data?

Bring baseray to your territory. Tell us your regions and what you sell. We load the data and build your first segments with you.