> ## Documentation Index > Fetch the complete documentation index at: https://docs.realtimelca.com/llms.txt > Use this file to discover all available pages before exploring further. # Create Base Project > Creates a building project from the smallest set of fields the platform needs, and returns the new project's id along with the id of its initial revision. Everything else — areas, calculation type, classification, site and operational energy, transport, and members — is configured afterwards. Use this rather than **Create Project** when you want the project to exist first and be filled in later. **Method:** `POST` **URL:** `{{lcabaseUrl}}/BuildingProject/base` **Authentication:** Bearer Token (`{{BearerToken}}`) **Permission:** the caller needs the `CreateProject` tenant permission. ## OpenAPI ````yaml /api-reference/realtime-lca-openapi.yaml post /BuildingProject/base openapi: 3.0.0 info: title: Real-Time LCA REST Documentation version: 1.0.0 description: >- ### Description 📝 This collection contains a set of REST API requests for the Real-Time LCA (Life Cycle Assessment) service. ### Authenticate user 👤🔑 In the `Auth` folder there's a `POST` request for authenticating the user. In this request body you can type in the user RTLCA user credentials (username & password) and a succesfull (`200 OK`) response will set the collection `BearerToken` variable which is then inherited by all other requests. servers: - url: https://api.realtimelca.com/rest/api description: REST API. - url: https://api.realtimelca.com/epd/api description: EPD API. - url: https://auth.realtimelca.com/frontegg/identity/resources/auth/v1 description: Authentication API (Frontegg identity v1). - url: https://realtimelca-prod.hasura.app description: GraphQL API (Hasura). security: - BearerAuth: [] tags: - name: Auth - name: User - name: Overview - name: Project - name: Dashboard - name: Mapping - name: Automapping - name: Transport - name: Waste - name: Inspect - name: Report - name: Images - name: Library - name: Datasource - name: Owner - name: Material - name: Constructions - name: Enums paths: /BuildingProject/base: servers: - url: https://api.realtimelca.com/rest/api post: tags: - Project - Create Base Project summary: Create Base Project description: >- Creates a building project from the smallest set of fields the platform needs, and returns the new project's id along with the id of its initial revision. Everything else — areas, calculation type, classification, site and operational energy, transport, and members — is configured afterwards. Use this rather than **Create Project** when you want the project to exist first and be filled in later. **Method:** `POST` **URL:** `{{lcabaseUrl}}/BuildingProject/base` **Authentication:** Bearer Token (`{{BearerToken}}`) **Permission:** the caller needs the `CreateProject` tenant permission. requestBody: required: true content: application/json: schema: type: object required: - name - buildingTypeId - yearOfConstruction - yearOfCommissioning properties: name: type: string description: The project name. buildingTypeId: type: integer description: >- The building type the project is assessed as. Valid values come from `buildingTypeEnum` on the **BuildingProject Enums** endpoint. yearOfConstruction: type: integer description: The year construction starts. yearOfCommissioning: type: integer description: The year the building is commissioned. projectStatusId: type: integer nullable: true enum: - 0 - 1 - 2 - 3 - 4 - 5 - 6 description: >- The design stage the project is in: `0` Competition, `1` Design, `2` Detailed Design, `3` Construction, `4` Operation, `5` Archived, `6` On Hold. Optional — omit it to leave the stage unset. Note that `0` is a real status rather than "none". models: type: array maxItems: 100 description: >- The disciplines the project is split into — one entry per model. Optional, and capped at 100 per project. Names are trimmed and lower-cased before they are stored, and entries that normalise to the same name are folded into a single model, active if any of them was active. Models created here are independent of Speckle: no stream is created or required. A model's commit, pull time, and referenced object stay empty until a stream is attached to it. items: type: object required: - name properties: name: type: string description: The model name. active: type: boolean default: true description: >- Whether the model is included in the project. Defaults to `true` when omitted. example: name: Spacious Ship buildingTypeId: 1 yearOfConstruction: 2024 yearOfCommissioning: 2026 projectStatusId: 1 models: - name: arkitektur active: true - name: konstruktion responses: '201': description: The project was created. content: application/json: schema: type: object properties: id: type: string format: uuid description: The new project's id. activeRevisionId: type: string format: uuid description: >- The project's initial revision, created together with the project. Carry this id through follow-up writes so they land on the right revision. example: id: 8f6b1c2e-5a4d-4f39-9c07-2b1d6e8a3f45 activeRevisionId: c1d40a77-9e28-4bb6-8f52-7ad3e9b04c16 '400': description: >- The payload was malformed — a model without a name, or more models than the per-project maximum — or a project constraint was violated, such as an unknown building type. The body is a plain-text message describing the problem. content: text/plain: schema: type: string examples: missingModelName: summary: A model was sent without a name value: every model needs a name tooManyModels: summary: More than 100 models were sent value: models exceeds the maximum of 100 per project components: securitySchemes: BearerAuth: type: http scheme: bearer ````