Arlington, VA Home Addition

Experts in Civil Engineering for Home Additions

  • Existing Conditions Surveying

  • Site Grading Design

  • Stormwater Management Design

  • Land Disturbance & Demolition Permits

  • Construction Stakeout Surveys

Professional Services

Every engineering plan depends on accurate survey data. Let's see what we have to work with by making an Existing Conditions Plan for your site.... Click to Read More!


Are you excited about your Architect's building plans? We'll create the full Site Plan set for your new home or building.... Click to Read More!

Construction Management Northern Virginia

Managing a construction project can be time-consuming and overwhelming. Let our experts handle it for you.... Click to Read More!


Who We Are

More than just a plan production firm, DEMARR Engineering is backed by industry proven experience from DEMARR Construction, a Class A Heavy Highway Contractor Since 1989. This background gives our firm a unique design perspective on developing practical and effective site plans for contractors to follow.  


With this combination of engineering and construction services under one roof, we have the capability to handle your project from the day your property is acquired to the day of your final occupancy permit. 

Our mission is to provide our clients with a high level of service they can depend on daily to keep their projects running smoothly. In an age of same-day shipping and instant electronic data interchange, we believe consultants should deliver information just as fast. When a client calls or emails our firm, they know we will always answer promptly. Doing our job well, with pride, with honesty, and with efficiency are the simple core qualities that make our company great. 



Contact a Civil Engineer

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Mailing Address

DEMARR Engineering, PLLC

1069 West Broad Street, Suite# 915

Falls Church, VA 22046-4610

Tel: 703-214-7220


To apply for a job with DEMARR Engineering, please send a cover letter together with your C.V. to:

Talk to a Civil Engineer: 
(703) 214-7220