Hill House Home, known for its popular Nap dresses, is launching an event dressing collection.

The company has introduced five dresses ideal for summer events, retailing from $398 to $498.

“I’ve always been somebody who loves to dress up,” said Nell Diamond, founder and chief executive officer of Hill House Home. “It’s one of the reasons I started Hill House. My personal dress code, my friends always joke, is overdressed.”

“I don’t own sweatpants, I go to the grocery store fully done up. I’ve apparently been that way since I was a child,” continued Diamond, who founded Hill House Home in New York City in 2016.

Diamond said she wears her Hill House dresses to a variety of levels of “fanciness.” For example, she’ll wear them to preschool drop-off, and if she styles them correctly, to a fancier occasion. Over the past couple of years, she’s seen her customers do the same thing.

From there, she decided to create a dressier offering in fabrics that were specifically designed for nighttime and glitzy affairs. For the first grouping, she is offering four styles, and one of them is available in two colors.

For example, she’s offering “a gorgeous all white lace dress.”

“It feels really romantic, and it has a big full skirt, and the lace is just so gorgeous and it has a corseted waist,” said Diamond, who said she wanted this “garden” one to feel “romantic, whimsical, dreamy.”

There is also a one-shouldered short style that’s a minidress that comes in black and power blue. That one is a city night out dress. “It has a gorgeous, kind of long train, but the train you can bustle with a little button on the back,” she said.

They are also offering two printed gowns. One she described with a medium-scale print, not huge, but not ditsy. “My mom actually came to my office a couple of weeks ago and saw it hanging right there, and took it off [the rack] and wore it to a wedding in Italy,” she said.

The last one has a halter neck with a big voluminous skirt, and it’s a very light fabric in a dark print.

The dresses range in size from double zero to 16. They will be available exclusively on hillhousehome.com, starting Tuesday.

Retail expansion is another opportunity for Hill House Home. The company has five stores and plans to open two more stores this year. The stores are in Nantucket, Palm Beach, New York, Dallas and Charleston, S.C. Generally, the stores average around 1,500 square feet. She said the best two stores are Charleston, S.C. and Dallas “and they fight it out every week,” for the number-one position, she said.

For the company’s 10-year anniversary in 2026, she plans to do a slew of collaborations and open two or three new stores.

Hill House Home started as a home company, with a few fashion dresses, and today fashion accounts for 87 percent of the business, said Diamond. “If these dresses do well, we’ll definitely design more,” she said. She noted that their swimwear has been doing “incredibly well for us, so that’s a category that we’re going to continue to invest in.” And another interesting one is “nightgowns that do really well for us, and pajamas.”

To date, Hill House Home has sold 1.2 million dresses. The average price point is $210.

Diamond noted that the company had its best year in 2024 “and 2025 is shaping up to beat it, which is really exciting.”

She noted that the top 15 percent of its customers average 12 dresses from them within the customer’s total purchase history.

While the business is mostly direct-to-consumer, it has begun wholesaling the collection and sells on Shopbop. “We have a few others we will be launching this year. But what we’ve seen with stores is that when people try on our product, they fall in love….We’d like to meet our customer where she is,” said Diamond.

To support the new event collection, Emma Craft shot an ad campaign at John Derian’s Provincetown home.