Sec. 42-24(a) does not turn on acreage. A general plan is required when property is proposed to be subdivided in sections — that is, when you intend to plat it in more than one go.
Two parts of that sentence do more work than they look like they do. The plan must illustrate all contiguous property under one ownership, legal interest or common control, which reaches past the piece you are platting first and past strict ownership into "legal interest or common control". And it must be submitted prior to or simultaneously with the plat application for the first section — there is no filing it later once the phasing becomes obvious.
The commission shall consider and act on applications for a general plan as provided in this section. Approval of a general plan by the commission shall be limited to the location and alignment of major thoroughfares, collector streets and any local streets shown on the general plan.
A general plan can show a great deal. Sec. 42-24(c) expressly permits it to identify the number of sections anticipated and the proposed land uses — single-family, multi-family, restricted and unrestricted reserves, utility plant sites, drainage and detention facilities, proposed easements.
None of that is what gets approved. Sec. 42-24(d) limits commission approval to the major thoroughfare, collector street pattern and any local street shown, and Sec. 42-76 says the same thing from the commission’s side. The approval is a street layout approval and nothing more.
That gap is easy to lose, because the approved document physically contains the land uses and carries the approval note on its face. Sec. 42-24(d) requires the note to be there. Nothing on the drawing separates the part that was approved from the part that was merely drawn.
| General plan | Street dedication plat | |
|---|---|---|
| Required or optional | Required when subdividing in sections | Optional, at the applicant’s election |
| What it does | Fixes the street layout for the whole holding | Dedicates one or more public streets |
| Prerequisite | None stated | A previously approved general plan for the area |
| Commission approval covers | Location and alignment of streets only | Consistency with the approved general plan |
| Scale | Between 1 inch to 600 feet and 1 inch to 100 feet | Between 1 inch to 100 feet and 1 inch to 20 feet |
| Duration | Four years, renewable | Not stated |
Sec. 42-24, 42-25, 42-50(13), 42-51(12), 42-76 and 42-77. Both instruments require an affidavit of encumbrances from the owner or an agent with a duty to inquire.
Sec. 42-24(f) is the operational heart of the section, and it repays a slow read.
The term is four years from commission approval. Amendment does not extend it. Revising a general plan mid-life buys nothing on the clock — the original expiry stands.
Recording a section renews it, by four years measured from the expiration date rather than from the recording, but only where two conditions hold together: the subdivision plat is consistent with the general plan, and it represents the lesser of 20 percent of the total acreage or 25 acres. On a 200-acre general plan the binding figure is 25 acres; on a 60-acre plan it is 12. A small section recorded to keep the plan alive will not do it.
Street dedication plats generally do not renew it — with one exception the section carves out deliberately. A street dedication plat that dedicates a major thoroughfare or a collector to its points of connection with adjacent properties as shown on the general plan extends the plan four years. Dedicating the through-connections the wider network depends on is rewarded; dedicating a stub is not.
An expired plan is not a dead end. Sec. 42-24(f) states that nothing prohibits filing a general plan application for the same property that was in an expired plan. What lapses with it is the anchoring effect under Sec. 42-24(g) and the ability to get a street dedication plat approved at all, since Sec. 42-25 conditions that on a previously approved general plan for the area.
Sec. 42-24(g) is the provision that makes a general plan matter to people who did not file it. While the plan remains in effect, the street system it approved forms the basis for street system extensions into adjacent properties to be platted.
So a neighbour platting against an active general plan starts from that plan’s street pattern as the default. The subsection provides an exit — the adjacent subdivider may demonstrate that the requirements of Article III can be met without the street extensions — but it is framed as an exception the neighbour must establish, not as a question left open.
Read in the other direction, this is the reason to keep a general plan current if you own land that others will build around: an in-effect plan sets the terms of the conversation at the boundary.
Sec. 42-25 makes a street dedication plat available at the option of an applicant to dedicate one or more public streets. It is the one plat in this article nobody is forced to file.
What it cannot do is stand alone. The same sentence provides that it shall not be approved unless the commission has previously approved a general plan for the area, "except as provided in this section". Sec. 42-77 then gives the commission exactly two options and no third: approve if the plat is consistent with a previously approved general plan encompassing each street to be dedicated, or disapprove if it is not. There is no deferral and no conditional approval in that section, unlike the subdivision plat provisions alongside it.
This is how the code reads; confirm with the city — or ask a builder who's actually pulled this permit in Houston. The authoritative text is the Houston Code of Ordinances; permitting questions go to Houston Permitting Center.