Advanced panelized construction · St. Louis, MOA better way to build for tomorrow
Factory-built wall panels and floor cassettes for homes, rowhomes and multifamily up to six stories. A 50% quicker construction schedule, a fixed factory price and delivery within 1,000 miles.
- Stick-built, not modular
- Fixed factory price
- Built to your drawings
MBS by the numbers
Lower project cost
Up to30%
Fixed factory price at contract
Quicker construction schedule
50%
Factory and site work run in parallel
Less waste
90%
Offcuts stay in the plant
Delivery radius
1,000mi
Standard flatbed and step-deck trucks
Building height
6stories
Wood-framed, 1 to 6 stories
CNC plant
40,000ft²
921 N 20th Street, St. Louis
- Selected for the City of St. Louis Infill RFP
- 2023 Arch Grants recipient
- Member, Modular Building Institute
- Ranken Technical College workforce partner
In the news:The Wall Street Journal · St. Louis Post-Dispatch · St. Louis Business Journal · First Alert 4
Featured project · North St. Louis
Greater Ville Infill Housing
The City of St. Louis selected MBS through its Infill Housing RFP to build 15 single-family and row homes on city-owned lots in The Ville.
- Contract
- $3.25M
- Homes
- 15
- Design
- The Malone
- Status
- In production
The program supports North St. Louis neighbors and tornado recovery. The homes use The Malone, our three-bedroom infill design, and the first wall panels are on our line now at our North St. Louis plant.
What we build
One wood-framed system, from a backyard ADU to six stories
Any stick-built project from one to six stories. Bring your drawings or start from ours.
Single-family homes
From 1,200 ft²
Townhomes and rowhomes
Typically 1,200 to 2,000 ft² per unit
ADUs and carriage houses
Backyard and alley living
Multifamily and mixed-use
Wood-framed, 1 to 6 stories
Affordable housing
Scattered-site and neighborhood infill
Relief and temporary housing
Shelter and relocatable concepts
Renderings are MBS concept designs, shown for illustration.
How it works
From drawings to weather-tight in five steps
Factory production runs while your foundation goes in. That is where the schedule comes from.
01
Design
Your drawings or ours
Send permit-ready plans, or let our in-house architectural designer start from a survey and lot dimensions. Every project is modeled in BIM.
02
Estimate
Fixed price, valid 30 days
We price your plans and return a fixed factory price. Freight within the 1,000-mile service area is in the number.
03
Manufacture
While your foundation goes in
After permit approval, panels are CNC-cut, framed, insulated and closed with windows, doors, cladding and MEP rough-in to the agreed scope.
04
Deliver
Standard trucks
Panels ship vertically or flat-packed on standard flatbed and step-deck trucks. No wide loads, no escorts.
05
Install
Weather-tight in days, not weeks
Our crew or your GC sets the panels on your foundation. Interior trades start in a dry, enclosed building.
Why the schedule is 50% quicker
Schematic. Your schedule is confirmed at contract.
Factory · panel manufacturing
Site · foundation, then set and close
Conventional build · one trade after another
MBS panelized build · 50% quicker
Four ways to work with MBS
Pick the scope. We hold the price.
Just the factory framing. CNC-cut subcomponents and open framed wall panels, built to your drawings. Your crew sheathes, closes and finishes on site.
- Subcomponents: door legs, headers, stud packs, channels, Els
- Open framed wall panels with coordinated openings
- Buy only the pieces your crew needs
CNC-cut, framed and sheathed wall panels, roof panels and floor cassettes. Your team insulates, closes and finishes on site.
- CNC-cut framing
- Structural sheathing
- Wall panels, roof panels, floor cassettes
Sheathing, WRB, insulation, air barrier, windows, doors, cladding and MEP rough-in are factory-installed. MBS or your GC sets the panels, and interior-finish trades follow.
- Everything in sheathed
- Mineral wool insulation, R-23 walls
- Windows, doors and cladding
- MEP rough-in
- Rothoblaas air and vapor control
MBS contracts and subcontracts the build from start to finish. One contract, one schedule, one point of contact.
- Everything in standard
- Site work and installation coordinated by MBS
- Inclusions set in your agreement
Unless turnkey, the owner or GC provides foundations, site work, utilities and interior finishes. Approved drawings and the agreed scope govern the final package.
The MBS Standard Wall
Seven layers. R-23.
Closed on the line, inspected before it ships. An MBS home achieved HERS 42.
- 1Exterior cladding
- 2Weather-resistive barrier
- 3Structural sheathing
- 4Exterior framing
- 5Cavity insulation
- 6Air and vapor control
- 7Interior gypsum
Exterior (1) to interior (7). Illustration, not to scale; approved drawings govern.
Built to your specifications
The MBS Standard is our baseline. We also build to client specifications, based on your project's needs, the quality of materials you want and your build requirements.
How custom specs workDesign catalog
Start from a plan that is ready to price
Concept designs for infill lots, rowhome blocks and backyard ADUs. Every one can be adapted to your site.
Single-familyMBS-SFH-2088
The Machinist
A four-bedroom single-level home with an attached three-bay garage and workshop.
- Beds
- 4
- Baths
- 2
- Stories
- 1
- Sq ft
- 2,088
Single-familyMBS-SFH-2089
The Porch
A two-bedroom walkout home with a covered front porch, wraparound deck and dedicated office.
- Beds
- 2
- Baths
- 2
- Stories
- 2
- Sq ft
- 2,089
RowhomesMBS-ROW-2547
The Linden
Five attached three-story homes with three bedrooms, a private top-floor suite and rear-alley parking.
- Beds
- 3
- Baths
- 2.5
- Homes
- 5
- Sq ft
- 2,547
Single-familyMBS-SFH-3374
The Lakefront
A three-bedroom, three-bath walkout home with generous gathering spaces and an optional attached garage.
- Beds
- 3
- Baths
- 3
- Stories
- 2
- Sq ft
- 3,374
Single-familyMBS-SFH-1600
The Mercer
Urban living with a private outdoor retreat.
- Beds
- 3
- Baths
- 2.5
- Stories
- 2
- Sq ft
- 1,600
ADUMBS-ADU-800
The Tandem
A complete home above a garage built for two.
- Beds
- 2
- Baths
- 1
- Stories
- 2
- Sq ft
- 800
Active projects
On the books in 2026
$12M+ in projects this year, led by the City of St. Louis Infill program.
| ID | Project | Segment | Location | Scope | Status |
|---|---|---|---|---|---|
| MBS-P01 | Greater Ville Infill HousingCity of St. Louis (SLDC / LCRA) · The Malone | Affordable housing | The Ville, St. Louis, MO | 15 single-family and row homes$3.25M | In production |
| MBS-P02 | Scott Drive Row ResidencesPrivate developer | Rowhomes | Raymore, MO (Kansas City metro) | 16 homes in two eight-home rows | In design |
| MBS-P03 | Monroe Street InfillARCHADEO | Rowhomes and multifamily | 1200-1214 Monroe Street, St. Louis, MO | 8 rowhomes, 9 flats or 15 to 19 apartments | In design |
| MBS-P04 | 2835 Missouri AvenueTwin Pillars LLC | Multifamily | St. Louis, MO | 3 stacked two-bedroom apartments | In design |
| MBS-P05 | Canterbury HomesC.W. Woods | Single-family infill | St. Louis, MO | 2 two-bedroom homes | In design |
| MBS-P06 | Aldine PlaceKeys Realty Group | Multifamily | The Ville, St. Louis, MO | 21 units in a three-story building | In design |
| MBS-P07 | Habitat for Humanity HomesHabitat for Humanity Saint Louis | Affordable housing | St. Louis, MO | Two-story single-family homes, two plan types | Estimating |
See the line
Walk the plant before you sign
Tours run Monday to Friday at our 40,000 ft² plant in North St. Louis. Bring your construction manager or your board.
- When
- Mon to Fri
- How long
- 60 minutes
- Where
- 921 N 20th St
What is panelized construction?
Panelized construction is conventional wood framing built in a factory. MBS cuts wall panels and floor cassettes on CNC equipment in St. Louis, closes them with insulation, windows, doors, cladding and MEP rough-in, ships them flat on standard trucks and sets them on your foundation. The finished building is stick-built, not a modular box or a manufactured home.
How much can I save?
Up to 30% lower project cost. Savings come from factory efficiency, CNC material planning, fewer weather delays and less site waste. Your fixed factory price is prepared from permit-ready drawings and is valid for 30 days.
Is panelized construction code compliant?
Yes. MBS builds to the adopted code of your jurisdiction. In Missouri our panels are inspected as conventional wood framing. In St. Louis the City inspects them in our factory and again on site, and drywall stays off at panel edges, tops and bottoms so inspectors can see every connection. Some states, Illinois among them, run their own factory-built programs with plan approval, third-party plant inspection and a state seal. We confirm the pathway for your state before scheduling.
How energy efficient is the MBS wall?
The MBS Standard Wall is a seven-layer, R-23 above-grade assembly with 2×6 framing, mineral wool insulation and Rothoblaas air and vapor control. Published targets: air leakage under 0.25 ACH50, STC 50+ with 5/8 in. gypsum and a one-hour fire rating with Type X gypsum. An MBS home achieved HERS 42. That is a project result, not a rating for every design.
Insights
Panelized construction, explained
Start a project
Send your plans. Get a fixed factory price.
Permit-ready drawings and a site address are all we need. Your estimate is valid for 30 days and includes freight within 1,000 miles.