The dressing down of your lace dress is often the trickiest part. Just a little bit of sheer lace which exposes the color of skin underneath will scream "LINGERIE".
Likewise, if you get nude lining on your lace, it will suggest skin underneath, hence the same sexy looks.
Lace dress with black lining is the best combo for work. You can even go for white lining or any other subtle lining except nude.
Make sure your dress doesnt have a low neckline which shows cleavage. As far as sheer lace is concerned, you can only have that on the sleeves to give you a trendy and chic look.
You can buy a black lace top to wear it over jeans or skirt. A fully lined lace top with not even the tiniest of skin peeking through will look more elegant than sexy.
Black lace skirts are also a trendy option to don for work. With basic blouses and fully lined lace skirts, these will give you that professional look.
Tone the dress down
If you think your black lace dress looks too sexy and inappropriate for your work setting, tone it down with black opaque tights to cover up your legs.
If you are wearing a skirt over a simple top, you can also go for tights to tone down the look. For lace tops, you can slip into your favorite denim jeans, trousers or a pencil skirt.
If your top is had sheer lace sleeves, bust or back, tone it down by wearing a cardigan, blazer or a jacket. A denim blazer also looks trendy and casual which may be appropriate for your work setting.
Get the right accessories
Black heels are always the perfect combo with any black lace dress. You can also go for strappy sandals or black pumps if you are uncomfortable in heels.
Accessorizing your dress with an ordinary belt will give the desired professional look. Red belts over simple black lace dresses work the best.
Some other accessories you can use to keep your look simple, perhaps a trendy bracelet or a watch. Accessorizing your lace dress too much might give you "little girl in the territory" look.