Quick Answer
A GC should confirm 7 things before hiring a commercial retaining wall contractor in South Florida: who owns the engineered design, drainage behind the wall, the permit and inspection sequence, base and backfill, the tie in to sod and plantings, the schedule against the CO date, and closeout photos. A gap in any one can push the CO date.
The wall is rarely the problem. The delay is. A wall that fails an inspection, or blocks the sod and landscape crew, pushes the CO date, and the owner hears about it from you. The 7 checks below are written for the superintendent or project manager who has to close the job.
1. Who owns the engineered design and the shop drawings?
When a wall needs engineered drawings, the project engineer or the wall’s design professional supplies them. Confirm who that is in the sub agreement before buyout, not at mobilization.
Whether a given wall needs engineering depends on its height and the local rules. Check the local height threshold with the building department. Green Image does not replace the engineer or the authority having jurisdiction. We build to the approved drawings and flag field conflicts early, so the project team can decide the fix before a crew is standing around waiting.
For general contractors: our free GC Field Guide to Selecting a Landscaper covers what to check before you hire a landscape sub. Get the free guide
2. What drainage is built behind and through the wall?
Water against the wall is what moves it, and South Florida puts a lot of water there. The water table is high, grades are flat, summer rain is heavy, and king tide flooding reaches low sites.
Ask the sub to name each piece: drain rock, filter fabric, an outlet to a catch basin or drain line, and weep or drain openings. If the outlet is not on the plans, ask who decides where it goes. Drainage is the service that builds these pieces, and it sits in the same scope as the wall when one provider does both. Drainage work does not include engineering, permitting, or downstream capacity unless separately provided by the right professional.
3. Who pulls permits and who books the inspections?
Settle this in writing before work starts. Ask the building department who must hold the permit for the wall, then name the party who pulls it and the party who books each inspection in the subcontract.
Then ask the sub for the inspection sequence: what gets inspected, when, and what must still be uncovered at that point. A wall backfilled before its inspection means digging it back out. Green Image does not handle permits in a standard scope, so we plan our crew days around the inspection dates the project team sets.
4. How are base, compaction and backfill done and checked?
South Florida soil is sandy, and a wall is only as stable as the base under it. Ask how the base is prepared, how it is compacted, and how the backfill goes in.
Get one written note naming who checks the base before the first course goes up. Then ask for dated photos of the base before it is covered. Photos taken after backfill show you nothing. A verbal “it was compacted” is not a record. If a test is specified on the drawings, ask the sub who performs it.
5. How does the wall tie into sod, plantings, drains and sleeves?
The wall sets the finished grade the sod and plants depend on. Any sleeve, drain line or irrigation pipe that crosses the wall must be in place before the wall closes over it.
A sub who also does drainage, sod and landscape installation removes 2 or 3 handoffs. Green Image is one provider for hardscape, drainage, sod and landscape installation, so you coordinate fewer trades on the same stretch of site. See our retaining walls page for how that scope fits together.
6. Does the schedule fit your CO date and the trades around it?
The wall goes in after rough grade and before final grade, sod, plantings, and any lines that must pass through it. Ask what the sub needs done by others before arriving: grade, utilities, and survey stakes. Then ask how many crew days the wall needs and who supervises.
A sub who cannot answer those 3 questions has not planned the job. Green Image handled the landscape closeout for a custom home builder in Boca Raton, coordinating with the project team. The published Boca Raton custom home builder landscape partnership case study has the verified details.
7. What closeout photos and documents do you get?
Photos and dated records are the paper trail behind your pay application and your punch list. Ask for dated before, during and after photos, and ask how often you will see progress.
Green Image documents work according to the agreed reporting plan, through the Landscape Visit Report, the Monthly Property Report and the Quarterly Property Review. The job has an assigned production team whenever practical, supervisor oversight, and 1 point of contact. Agree on the photo list at kickoff so the closeout package builds as the work goes.
FAQ
Who is responsible for the engineered design of a retaining wall on a commercial job?
The project engineer or the wall’s design professional supplies engineered drawings when the wall requires them. Confirm that named party in the sub agreement.
Can one sub handle the wall, drainage, sod and plantings?
Yes, Green Image provides hardscape, drainage, sod and landscape installation, so you coordinate fewer trades. Engineering, surveying and permitting stay with the appropriate professionals.
How do I keep a wall sub from holding up my CO date?
Confirm crew days, what others must finish first, and the inspection sequence before you sign. Then put them in the schedule.
What should I ask a wall sub up front?
Ask who supervises, how many crew days the wall needs, what must be done by others before arrival, and how progress gets reported.
For the wider closeout picture, see Green Image for general contractors and the GC Field Guide to Selecting a Landscaper.
Get a Quote: we walk your property and send a written proposal with photos within 72 hours.
