Planning an HO scale scene around prefab modular buildings often means choosing between a construction piece and a planning aid. The DPM Modular Building System offers both in the same family: the #301-47 Wall Sections Kit and the #301-91 Planning Sheet. Each is new and HO scale, but they serve different steps.
Quick verdict
The #301-47 Wall Sections Kit is the physical build component: a plastic, HO-scale kit whose product type is Building. The #301-91 Planning Sheet is the companion document, placed in the pre-build stage of your project. If you need to assemble walls, the kit is the one to use. If you need to plan first, the sheet is the lower-priced choice.
Comparison at a glance
| Product | Listed Price | Price Bar | Product Type | Scale |
|---|---|---|---|---|
| DPM #301-47 Wall Sections Kit | USD 7.99 | Building | HO (1:87) | |
| DPM #301-91 Planning Sheet | USD 1.00 | Document | HO (1:87) |
Both items share the DPM Modular Building System name, HO Gauge, and 1:87 scale. The listed price gap is USD 6.99, with the wall sections kit priced higher than the planning sheet.
Where the wall sections kit stands out
The #301-47 Wall Sections Kit is the only one of the two identified as a plastic building component. Its product type is Building, and its title directly points to wall sections. If your prefab modular building project is ready for assembly, this kit gives you the physical sections to work with. For a builder focused on construction, this is the product that belongs in the layout.
Where the planning sheet stands out
The #301-91 Planning Sheet is the document option. Its product type is Document, and its title identifies it as a planning sheet rather than a wall section. It is the lower-priced item in this head-to-head and makes sense for the stage before assembly begins. If you need a reference to guide your layout, this sheet is the one to keep on hand.
Product notes
DPM Modular Building System #301-47 - Wall Sections Kit

The #301-47 wall sections kit is a new, HO-scale plastic kit from the DPM Modular Building System. It is the build-oriented option: the title says wall sections, and the product type confirms a Building role. If your layout is at the point where you need actual wall components to assemble, this kit gives you the physical pieces to work with. The limitation is its higher listed price compared to the planning sheet, so it is not the lower-priced option here. Because it is specifically a wall sections kit, it is also not a complete structure on its own. It is one component of the modular system, so make sure your project calls for wall sections rather than a planning reference.
DPM Modular Building System #301-91 - Planning Sheet

The #301-91 planning sheet is the lower-priced product in this pair, and it is clearly the planning stage option. Both the title and the product type point to a Document, meaning it does not provide wall components for assembly. Its strength is in the pre-build stage: when you are mapping out your HO scale prefab modular building, a planning sheet gives you a reference that fits the same DPM Modular Building System and 1:87 scale. The trade-off is equally clear - it will not give you walls to assemble. If you want a reference to guide the layout before construction starts, the planning sheet is the one to keep at hand.
Final choice by use case
The decision comes down to whether you are at the construction step or the planning step. For a builder who needs physical wall sections, the #301-47 Wall Sections Kit is the useful pick. For a planner who wants a reference before the build, the #301-91 Planning Sheet is the sensible companion.