Sri Lanka Development Corporation (SLLDC) was initially a body corporate duly established under the Colombo District (Low Lying Areas).

The Corporation is a member of National Construction Association of Sri Lanka (NCASL) and Green Building Council of Sri Lanka as well. The Cooperation has been also certified as a ISO 9001:2008 organization. SLLRDC is backed by a well-qualified and experienced staff consisting of Engineers in various Engineering disciplines such as Civil, Mechanical, Electrical, and Chemical Engineering, Architectures, Quantity Surveyors and allied professionals such as legal and other finance. The Corporation is in possession of all necessary equipment, machinery and related resources to the construction, Drainage & Reclamation Sector.

SLLR&DC has been engaged in design of drainage plans for marshy lands and structural designs for multi storeyed buildings & hydraulic structures for the last 40 years. SLLR&DC has acquired specialized knowledge on hydrology & hydraulics required for design and analysis of storm water drainage systems in Sri Lanka. SLLR&DC is the State agency which grants permission for the public to fill marshy land subject to provision of storm water drainage as per designs prepared by SLLR&DC. It is continuously involved in the preparation of Master Drainage Plans for catchments and sub catchments identifying lowlands which could be allowed for reclamation after leaving detention areas and improving storm water drainage