Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 9 · Vastu, Griha Pravesha
वास्तु गृहप्रवेशश्च
नात्युच्छ्रितं नातिनीचं कुड्योत्सेधं यथारुचि ।गृहोपरि गृहादीनामेवं सर्वत्र चिंतयेत् ॥ ५९३ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 593.
Not too tall and not too low. Make the wall height as one likes. For a house above a house, and the rest, think the same way everywhere.
Simple meaning: Make walls neither too tall nor too low. Use the same thinking for upper floors.
गृहादीनां गृहश्रावं क्रमशोऽष्टविधं स्मृतम् ।
Roof slopes come in eight kinds, named after lands. Four are named here.
मागधं शूरसेनं च गांधारावतिका स्मृतम् ।
The other four measures are named. The first has a rise of a quarter of the breadth.
पांचालमातुलानां च ह्युत्तरोत्तरवृद्धितः ।
Each roof measure rises higher than the one before it.