Comisiynwyd Comisiwn y Gyfraith Cymru a Lloegr gan Lywodraeth Cymru i gynnal adolygiad manwl o gyfraith cynllunio yng Nghymru er mwyn symleiddio a chydgrynhoi'r ddeddfwriaeth. Daeth yr adolygiad i ben ar 30 Tachwedd 2018 pan gyflwynwyd ei adroddiad, ‘Cyfraith Cynllunio yng Nghymru: Adroddiad Terfynol’ i'w ystyried gan Lywodraeth Cymru. Gosodwyd yr adroddiad terfynol gerbron Cynulliad Cenedlaethol Cymru hefyd ac fe'i cyhoeddwyd ar wefan Comisiwn y Gyfraith.
The Law Commission for England and Wales was commissioned by the Welsh Government to undertake a detailed review of planning law in Wales, with the aim of simplifying and consolidating the legislation. The review concluded on 30 November 2018 with the submission of their report ‘Planning Law in Wales: Final Report’ for consideration by the Welsh Government. The final report was also laid in front of the National Assembly for Wales and published on the Law Commission’s website.