This energy-efficient Irvington bungalow is the epitome of house hunting excellence, blending historical charm with a wealth of modern upgrades in one of Portland's most coveted neighborhoods - the ultimate trifecta of Portland living! The sellers, being professional energy efficiency researchers, left no stone unturned in their quest to reduce their energy usage. From top-notch insulation and low-e windows to the high-efficiency furnace w/zoned temperature control, sustainability is at the forefront of every system. Other upgrades include a brand new sewer line, foundation sheer walls, seismic retrofitting, and updated plumbing/electric. With 3 main level beds (4th BR is non-conforming on lower level) the layout is nothing short of marvelous. The double living room and spacious dining area are fit for hosting epic gatherings, while the darling kitchen is a storage-lover's dream with approximately 250 SF packed with custom cabinetry. And with laundry hookups in the bathroom, it's true single level living.In 2002, the sellers added an en suite bath and stunning sunroom designed by a solar architect. Giant picture windows maximize winter light, while overhangs block direct rays from the high summer sun. Imagine having your very own office, art studio, or tranquil retreat where you can savor your morning coffee while basking in the sun and admiring views of your bountiful garden. As a bonus: the back entry offers potential for a separate guest quarters or multi-generational setup.Situated in a tight-knit enclave where neighbors look after one another, this home boasts an unbeatable location just blocks from Irving Park and an array of conveniences: grocery store, coffee shops, and a smorgasboard of dining options. After 30+ years of love and care, the sellers are ready to pass the torch to a new owner. When you visit, scan the QR codes to uncover decades of stories packed into this 2,500 SF treasure trove of a home. [Home Energy Score = 4. HES Report at https://rpt.greenbuildingregistry.com/hes/OR10227026]