We have designed and fabricated double-gate ambipolar field-effect transistors, which exhibit p-type and n-type characteristics by controlling the polarity of the second gate. In this work, we present an approach for designing an efficient regular layout, called Sea-of-Tiles (SoTs). First, we address gate-level routing congestion by proposing compact layout techniques and novel symbolic-layout styles. Second, we design four logic tiles, which form the basic building block of the SoT fabric. We run extensive comparisons of mapping standard benchmarks on the SoT. Our study shows that SoT with Tile(G2) and TileG(1h2), on an average, outperforms the one with Tile(G1) and Tile(G3) by 16% and 10% in area utilization, respectively.