Land Drainage Installation Houston, TX

Land drainage is the right scope when the problem is bigger than one corner of a yard. Typical cases include acreage where water crosses the property from higher neighboring land, rural lots where the roadside ditch or driveway culvert is not doing its job, new homes where the final grade has settled and water now runs toward the slab, and older properties with several failed drains from different contractors.

It is also the right scope before major construction. A pool, detached garage, large patio, or long driveway changes how water moves across the land. Planning drainage first avoids building into a problem.

On a big lot, water follows the land's overall fall, which might be a foot or two across hundreds of feet. Land drainage works with that fall. We identify where water enters the property, where it collects, and where it can legally leave. Then we shape the ground with broad swalesSwaleA shallow, gently sloped channel in the ground, often grassed, that guides surface water toward an outlet. In practice: Side-yard swales between houses are common on Houston lots and are easily blocked by fences, beds or fill. and berms, collect concentrated flow in basins or inlets, and carry it through mainline pipe to the outlet.

Larger properties often use a trunk and branch layout: a larger mainline to the outlet, with smaller branch lines feeding it from collection points and downspouts. In unincorporated parts of Harris, Fort Bend, and Montgomery counties, the outlet is often a roadside ditch, and work that touches a ditch, culvert, or driveway crossing may need approval. Bayou-adjacent lots may border flood control right-of-way, which has its own rules.

Large sites need more upfront work, so the planning steps carry extra weight.

1. 1Property walk with a Home Scout covering the full parcel, neighboring land, ditches, and culverts.
2. 2Elevation survey across the site to map fall, low areas, and flow paths.
3. 3Drainage and grade plan showing mainline routes, branch lines, collection points, swales, and outlets.
4. 4Review of city, county, or HOA requirements for the location.
5. 5811 locates and staking of all pipe runs and grade changes.
6. 6Rough grading with equipment, then trenching and pipe installation from the outlet upstream.
7. 7Finish grading, collection points set to grade, and protection on new swales.
8. 8Water test of every branch, then seeding or sod and a walkthrough.

Mainlines on large properties are often a larger diameter than a typical backyard line, sized to the area draining to them. We use solid smooth-wall pipe such as SDR-35 for carry lines because it holds slope over long runs and can be cleaned. Perforated pipe goes in only where the goal is collecting groundwater, wrapped in fabric and washed stone.

Collection options include NDS catch basinsArea drainA surface inlet with a grate that collects water from a low spot and sends it into an underground pipe., larger area drains for open ground, and channel drainsChannel drainA long, narrow grated drain set into paving to catch sheet flow along an edge, such as at a garage door or patio edge. at driveways and hard surfaces. Outlets may be a ditch connection, a rock pad where pipe daylights onto open ground, or a sump and pump on parcels with no usable fall. New swales on bare soil need protection, such as seed, sod, or erosionErosionSoil carried away by moving water, often seen as bare channels, exposed roots or sediment on paving. control blanket, until vegetation holds them.

Scale drives cost: total pipe length, pipe diameter, number of collection points, and how much soil has to move. Rough grading on acreage needs larger equipment, and imported fill or hauled-off spoils add to the total. On rural lots, distance to a legal outlet is often the single biggest variable.

Approvals, ditch and culvert work, and restoring large areas of lawn or pasture also factor in. For a starting range, use our ballpark price tool. Large projects can be phased, and financing is available for projects from $5,000 to $250,000, approval not guaranteed.

On new construction, the most common issue is backfill settling around the slab. Ground that sloped away at closing now slopes toward the house, and builder downspouts dump into the low spot it created. On acreage, we find drain lines that run too far with too little fall, culverts set too high or crushed at driveway crossings, and outlets that discharge onto a neighbor's land.

The other recurring problem is a series of separate fixes that do not work together: a French drainFrench drainA gravel-filled trench with a perforated pipe that collects water from the soil and carries it away. In practice: In heavy clay, a French drain mainly works by intercepting water near the surface. It must slope to a real outlet to be effective. from one company, pop-ups from another, a pump from a third. We often start by mapping what is already in the ground before deciding what to keep.

Land drainage usually starts with excavation and grading to set the overall shape of the property. Where runoff has already cut into slopes or banks, add erosion control. Downspouts on the house and outbuildings tie in through a rainwater drainage system. For how these pieces fit together, see our drainage service in Houston.

A Home Scout visits every property before a proposal is written, and on large sites that visit covers the whole parcel. Our NDS Certified drainage specialists plan the system, and one team handles the grading, pipe, and restoration, with no subcontractor hand-offs. Proposals are itemized and priced under our price-what-we-quote guarantee, and the drainage is backed by our Drainage Performance Guarantee.