--- /dev/null
+# declaration-block-semicolon-space-before
+
+Require a single space or disallow whitespace before the semicolons of declaration blocks.
+
+```css
+a { color: pink; }
+/** ↑
+ * The space before this semicolon */
+```
+
+This rule ignores semicolons that are preceded by Less mixins.
+
+## Options
+
+`string`: `"always"|"never"|"always-single-line"|"never-single-line"`
+
+### `"always"`
+
+There *must always* be a single space before the semicolons.
+
+The following patterns are considered violations:
+
+```css
+a { color: pink; }
+```
+
+```css
+a { color: pink; top: 0; }
+```
+
+The following patterns are *not* considered violations:
+
+```css
+a { color: pink ; }
+```
+
+```css
+a { color: pink ; top: 0 ; }
+```
+
+### `"never"`
+
+There *must never* be whitespace before the semicolons.
+
+The following patterns are considered violations:
+
+```css
+a { color: pink ; }
+```
+
+```css
+a { color: pink ; top: 0 ; }
+```
+
+The following patterns are *not* considered violations:
+
+```css
+a { color: pink; }
+```
+
+```css
+a { color: pink; top: 0; }
+```
+
+### `"always-single-line"`
+
+There *must always* be a single space before the semicolons in single-line declaration blocks.
+
+The following patterns are considered violations:
+
+```css
+a { color: pink; }
+```
+
+The following patterns are *not* considered violations:
+
+```css
+a { color: pink ; }
+```
+
+```css
+a { color: pink; top: 0; }
+```
+
+```css
+a { color: pink ; top: 0 ; }
+```
+
+### `"never-single-line"`
+
+There *must never* be whitespace before the semicolons in single-line declaration blocks.
+
+The following patterns are considered violations:
+
+```css
+a { color: pink ; }
+```
+
+The following patterns are *not* considered violations:
+
+```css
+a { color: pink; }
+```
+
+```css
+a { color: pink; top: 0; }
+```
+
+```css
+a { color: pink ; top: 0 ; }
+```