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SDS Impact Map

SDS Historical Map - Firm Historical Map

SDS Statewide Services Map

SDS Statewide Services Map - Firm Services Map

Who We Are – Company Profile

Sharrah Dunlap Sawyer, Inc. has been consulting Northern California since 1965. Our local knowledge, acquired through years of experience, has earned us excellent working relationships with regulatory agencies, contractors, and the north state business community. We know the economic, environmental, and regulatory challenges that impact projects in our state and the north state specifically. Time is money, and our diverse team of solution oriented professionals use their technical expertise, local knowledge, and connections to provide sustainable cost-effective design solutions.


Our skilled staff and state of the art equipment produce surveys and maps for projects of all sizes. Our expertise includes: topographic and boundary surveys; elevation certificates and flood surveys; ALTA/ASCM land title surveys; property line adjustments; parcel maps; subdivision maps; easement preparation, research, and analysis; and construction staking to establish horizontal and vertical control for construction projects.

Civil Engineering

Civil engineering is the backbone of our operation. Our engineers find solutions to whatever engineering challenges your project may face. We specialize in: feasibility studies, phase 1 environmental studies, regulatory permitting, grading and drainage design, hydrology, water and storm water design, roadway and utility design, retaining walls and sound walls, bid and construction administration, and Storm Water Pollution Prevention Plans (SWPPP). We have multiple QSD and QSP on staff who provide cost-effective BMP solutions, monitoring, inspection and reporting services, and turbidity and pH sampling to ensure construction general permit compliance.

Land Planning

An integral part of the SDS team, our land planners specialize in preliminary concepts to finished designs for properties of all sizes. From single parcels to master planned communities, we take pride in producing sustainable and efficient designs that result in successful projects and satisfied clients.


From entitlements and permitting to marketing and advertising, we offer a wide variety of presentation graphics to accurately and attractively convey your vision.

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