diff --git a/wiki-rtd/docs/wiki_development/general/build-locally.md b/wiki-rtd/docs/wiki_development/general/build-locally.md
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@@ -0,0 +1,63 @@
+# Development Build Locally Notes
+
+This is WIP to help build RetroDECK locally. It wsa notes taken while adding the Flash Emulator Ruffle to the project. 
+
+## Overview
+
+RetroDECK is a big project in terms of scope and build size! It creates a 1.4GB flatpak file and the build folder is about 23GB.
+It takes about 3 hours to build on an 8 core PC.
+
+It would also be worth running RetroDECK in [debug mode](https://retrodeck.readthedocs.io/en/latest/wiki_development/general/debug-mode/) to get familiar with how /apps folder and other read only areas of the flatpak.
+
+<img src="../../../wiki_images/graphics/development/retrodeck-overview.png" width="500">
+
+### Download RetroDeck
+
+Clone the repository. The --recursive option is used to ensure the RetroDECK sub modules are download(ie Emulators from other projects). The only element that is not downloaded for changing/editing is the [RetroDECK fork of ES-DE](https://github.com/XargonWan/RetroDECK-ES-DE). That should only be needed if you wish to add a new emulator via ES-DE.
+
+```bash
+git clone --recursive https://github.com/XargonWan/RetroDECK
+```
+If you missed doing a recursive download then can also use the command below. The command is also initiated as part of the build process.
+
+```bash
+git submodule update --init --recursive
+```
+
+Then use git checkout to select the latest cooker branch.
+
+### Build locally via bash script
+
+```bash
+cd RetroDECK
+developer_toolbox/build_retrodeck_locally.sh
+```
+
+Have a look at what the script does first and look at the corresponding automation_tools/ folder that the script above references for the build
+
+The build will take about 3 hours on a relatively pc/laptop.
+
+The build process creates a flatpak_builder file.
+
+
+### Build locally installed github runner.
+
+
+Creates an artifact on Guthub and a local file in actions-runners
+
+## FAQ
+
+Crash during local sh build?
+
+- Stay Calm!
+- Restart the PC/laptop.
+- re run command below it should hopefully continue from the last good build action.
+```bash 
+developer_toolbox/build_retrodeck_locally.sh
+```
+
+Crash during local github runner build?
+
+- Stay Calm!
+- Restart the PC/laptop.
+- make sure runner started and then re run the failed Github action
\ No newline at end of file
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diff --git a/wiki-rtd/mkdocs.yml b/wiki-rtd/mkdocs.yml
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@@ -214,6 +214,7 @@ nav:
       - Debug Mode: wiki_development/general/debug-mode.md
       - Folders and Filepaths: wiki_development/general/folders-filepaths.md
       - Start with Development (WIP): wiki_development/general/general-development.md
+      - Build Locally (WIP): wiki_development/general/build-locally.md
     - Testing 📝:
       - How do I help out with testing?: wiki_development/testing/general-testing.md
       - Release Candidate Testing: wiki_development/testing/release-candidate-testing.md