We hired a Design and Build company to create architect plans and 3D renderings for a closet and ADU addition. We were to move forward with the permit process and construction but due to COVID and new circumstances, we have been faced with delays and money loss in investments and change in life circumstance and now will not move forward with any work done/construction. We have paid them 10,000 for the plans and 3D renderings and now they are demanding 4,000 more without any work done or invoice to show what this new charge is for. They are threatening to come to our house AND putting a lien on our home despite no work being done. Is this legal? what can we do to protect ourselves. Can they put a lien on our house without any actual work done?