Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 9 · Vastu, Griha Pravesha
वास्तु गृहप्रवेशश्च
पांचालमातुलानां च ह्युत्तरोत्तरवृद्धितः ।वैदेहादीन्यशेषाणि मानानि स्युर्यथाक्रमम् ॥ ५९६ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 596.
From the Panchala on, each next one rises more than the one before. So the Videha and all the other measures follow in order.
Simple meaning: Each roof measure rises higher than the one before it.
पांचालमानं सर्वेषां साधारणमतः परम् ।
Panchala is for all. Avanti is for Brahmins and Gandhara for Kshatriyas.
कौजन्यमानं वैश्यानां विप्रादीनां यथोत्तरम् ।
Kaujanya is for Vaishyas. Houses of two or three floors take the roof slope as told.
उष्ट्रकुंजरशालानां ध्वजायेप्यथ वा गजे ।
For elephant, camel and cattle halls, use the banner or elephant point.