diff --git a/packages/builder/src/userInterface/propsDefinitionParsing/createDefaultProps.js b/packages/builder/src/userInterface/propsDefinitionParsing/createDefaultProps.js
index 1db0f33c2a..083fda3b27 100644
--- a/packages/builder/src/userInterface/propsDefinitionParsing/createDefaultProps.js
+++ b/packages/builder/src/userInterface/propsDefinitionParsing/createDefaultProps.js
@@ -1,11 +1,8 @@
 import {
     isString, 
-    isBoolean, 
-    isNumber,
-    isArray,
     isUndefined
 } from "lodash/fp";
-
+import { types } from "./types";
 import { assign } from "lodash";
 
 export const createDefaultProps = (propsDefinition, derivedFromProps) => {
@@ -31,7 +28,7 @@ export const createDefaultProps = (propsDefinition, derivedFromProps) => {
 }
 
 const parsePropDef = propDef => {
-    const error = message => ({error:message});
+    const error = message => ({error:message, propDef});
 
     if(isString(propDef)) {
         if(!types[propDef])
@@ -56,13 +53,9 @@ const parsePropDef = propDef => {
     return propDef.default;
 }
 
-const propType = (defaultValue, isOfType) => ({
-    isOfType, default:defaultValue
-});
-
-const types = {
-    string: propType(() => "", isString),
-    bool: propType(() => false, isBoolean),
-    number: propType(() => 0, isNumber),
-    array: propType(() => [], isArray)
-}
\ No newline at end of file
+/*
+Allowed propDefOptions
+- type: string, bool, number, array
+- default: default value, when undefined
+- required: field is required 
+*/
\ No newline at end of file
diff --git a/packages/builder/src/userInterface/propsDefinitionParsing/types.js b/packages/builder/src/userInterface/propsDefinitionParsing/types.js
new file mode 100644
index 0000000000..30e1b77f0d
--- /dev/null
+++ b/packages/builder/src/userInterface/propsDefinitionParsing/types.js
@@ -0,0 +1,26 @@
+import {
+    isString, 
+    isBoolean, 
+    isNumber,
+    isArray
+} from "lodash/fp";
+
+const defaultDef = typeName => () => ({
+    type: typeName,
+    required:false,
+    default:types[typeName].default,
+    options: typeName === "options" ? [] : undefined,
+    itemPropsDefinition: typeName === "array" ? "string" : undefined
+});
+
+const propType = (defaultValue, isOfType, defaultDefinition) => ({
+    isOfType, default:defaultValue, defaultDefinition
+});
+
+export const types = {
+    string: propType(() => "", isString, defaultDef("string")),
+    bool: propType(() => false, isBoolean, defaultDef("bool")),
+    number: propType(() => 0, isNumber, defaultDef("number")),
+    array: propType(() => [], isArray, defaultDef("array")),
+    options: propType(() => "", isString, defaultDef("options"))
+};
\ No newline at end of file
diff --git a/packages/builder/src/userInterface/propsDefinitionParsing/validateProps.js b/packages/builder/src/userInterface/propsDefinitionParsing/validateProps.js
new file mode 100644
index 0000000000..866daf2c6a
--- /dev/null
+++ b/packages/builder/src/userInterface/propsDefinitionParsing/validateProps.js
@@ -0,0 +1,106 @@
+import { types } from "./types";
+import { createDefaultProps } from "./createDefaultProps";
+import { isString } from "util";
+import { 
+    includes,
+    filter, 
+    map, 
+    keys, 
+    flatten,
+    each } from "lodash/fp";
+import { common } from "budibase-core";
+
+const pipe = common.$;
+
+const makeError = (errors, propName) => (message) =>
+    errors.push({
+        propName, 
+        error:message});
+
+export const validateProps = (propsDefinition, props, isFinal=true) => {
+
+    const errors = [];
+
+    for(let propDefName in propsDefinition) {
+
+        let propDef = propsDefinition[propDefName];
+
+        if(isString(propDef))
+            propDef = types[propDef].defaultDefinition();
+
+        const type = types[propDef.type];
+
+        const error = makeError(errors, propDefName);            
+
+        const propValue = props[propDefName];
+        if(isFinal && propDef.required && propValue) {
+            error(`Property ${propDefName} is required`);
+            continue;
+        } 
+
+        if(!type.isOfType(propValue)) {
+            error(`Property ${propDefName} is not of type ${propDef.type}. Actual value ${propValue}`)
+            continue;
+        }
+
+        if(propDef.type === "array") {
+            for(let arrayItem of propValue) {
+                const arrayErrs = validateProps(
+                    propDef.itemPropsDefinition,
+                    arrayItem,
+                    isFinal
+                )
+                for(let arrErr of arrayErrs) {
+                    errors.push(arrErr);
+                }
+            }    
+        }
+
+        if(propDef.type === "options" 
+           && propValue
+           && !includes(propValue)(propDef.options)) {
+            error(`Property ${propDefName} is not one of allowed options. Acutal value is ${propValue}`);
+        }
+    }
+
+    return errors;
+}
+
+export const validatePropsDefinition = (propsDefinition) => {
+    const { errors } = createDefaultProps(propsDefinition);
+    
+
+    // arrar props without itemPropsDefinition
+    pipe(propsDefinition, [
+        keys,
+        map(k => ({
+            propDef:propsDefinition[k],
+            propName:k
+        })),
+        filter(d => d.propDef.type === "array" && !d.propDef.itemPropsDefinition),
+        each(d => makeError(errors, d.propName)(`${d.propName} does not have a definition for it's item props`))
+    ]);
+
+    const arrayPropValidationErrors = pipe(propsDefinition, [
+        keys,
+        map(k => propsDefinition[k]),
+        filter(d => d.type === "array" && d.itemPropsDefinition),
+        map(d => validatePropsDefinition(d.itemPropsDefinition)),
+        flatten
+    ]);
+
+    pipe(propsDefinition, [
+        keys,
+        map(k => ({
+            propDef:propsDefinition[k],
+            propName:k
+        })),
+        filter(d => d.propDef.type === "options"
+                    && (!d.propDef.options || d.propDef.options.length === 0)),
+        each(d => makeError(errors, d.propName)(`${d.propName} does not have any options`))
+    ]);
+
+    return [...errors, ...arrayPropValidationErrors] 
+
+}
+
diff --git a/packages/builder/tests/propsParsing.spec.js b/packages/builder/tests/createDefaultProps.spec.js
similarity index 100%
rename from packages/builder/tests/propsParsing.spec.js
rename to packages/builder/tests/createDefaultProps.spec.js
diff --git a/packages/builder/tests/validateProps.spec.js b/packages/builder/tests/validateProps.spec.js
new file mode 100644
index 0000000000..9f63fc31ff
--- /dev/null
+++ b/packages/builder/tests/validateProps.spec.js
@@ -0,0 +1,156 @@
+import { 
+    validatePropsDefinition,
+    validateProps 
+} from "../src/userInterface/propsDefinitionParsing/validateProps";
+import { createDefaultProps }  from "../src/userInterface/propsDefinitionParsing/createDefaultProps";
+import {
+    keys, some
+} from "lodash/fp";
+
+// not that allot of this functionality is covered
+// in createDefaultProps - as validate props uses that.
+
+describe("validatePropsDefinition", () => {
+
+    it("should recursively validate array props and return no errors when valid", () => {
+
+        const propsDef = {
+            columns : {
+                type: "array",
+                itemPropsDefinition: {
+                    width: "number",
+                    units: {
+                        type: "string",
+                        default: "px"
+                    }
+                }
+            }
+        }
+
+        const errors = validatePropsDefinition(propsDef);
+
+        expect(errors).toEqual([]);
+
+    });
+
+    it("should recursively validate array props and return errors when invalid", () => {
+
+        const propsDef = {
+            columns : {
+                type: "array",
+                itemPropsDefinition: {
+                    width: "invlid type",
+                    units: {
+                        type: "string",
+                        default: "px"
+                    }
+                }
+            }
+        }
+
+        const errors = validatePropsDefinition(propsDef);
+
+        expect(errors.length).toEqual(1);
+        expect(errors[0].propName).toBe("width");
+
+    });
+
+    it("should return error when no options for options field", () => {
+
+        const propsDef = {
+            size: {
+                type: "options",
+                options: []
+            }
+        }
+
+        const errors = validatePropsDefinition(propsDef);
+
+        expect(errors.length).toEqual(1);
+        expect(errors[0].propName).toBe("size");
+
+    });
+
+    it("should not return error when options field has options", () => {
+
+        const propsDef = {
+            size: {
+                type: "options",
+                options: ["small", "medium", "large"]
+            }
+        }
+
+        const errors = validatePropsDefinition(propsDef);
+
+        expect(errors).toEqual([]);
+
+    });
+
+});
+
+const validPropDef = {
+    size: {
+        type: "options",
+        options: ["small", "medium", "large"],
+        default:"medium"
+    },
+    rowCount : "number",
+    columns : {
+        type: "array",
+        itemPropsDefinition: {
+            width: "number",
+            units: {
+                type: "string",
+                default: "px"
+            }
+        }
+    }
+
+};
+
+const validProps = () => {
+    const { props } = createDefaultProps(validPropDef);
+    props.columns.push(
+        createDefaultProps(validPropDef.columns.itemPropsDefinition).props);
+    return props;
+}
+
+describe("validateProps", () => {
+
+    it("should have no errors with a big list of valid props", () => {
+        
+        const errors = validateProps(validPropDef, validProps(), true);
+        expect(errors).toEqual([]);
+        
+    });
+
+    it("should return error with invalid value", () => {
+        
+        const props = validProps();
+        props.rowCount = "1";
+        const errors = validateProps(validPropDef, props, true);
+        expect(errors.length).toEqual(1);
+        expect(errors[0].propName).toBe("rowCount");
+        
+    });
+
+    it("should return error with invalid option", () => {
+        
+        const props = validProps();
+        props.size = "really_small";
+        const errors = validateProps(validPropDef, props, true);
+        expect(errors.length).toEqual(1);
+        expect(errors[0].propName).toBe("size");
+        
+    });
+
+    it("should return error with invalid array item", () => {
+        
+        const props = validProps();
+        props.columns[0].width = "seven";
+        const errors = validateProps(validPropDef, props, true);
+        expect(errors.length).toEqual(1);
+        expect(errors[0].propName).toBe("width");
+        
+    });
+})
\ No newline at end of file