Most plans in the 2,300–2,500 sq ft single-story range ask the buyer to pick one compromise: either a real home office or a proper outdoor kitchen, either a three-car garage or a clean front facade, either a generous primary suite or comfortable secondary bedrooms. Plan 52021HZ is an interesting case because it tries to answer all four at once, and to a close second reading it mostly pulls it off. The office has its own 10-foot ceiling and a real door. The rear porch has the depth and plumbing stub for a genuine outdoor kitchen, not a grill parking spot. The three-car garage is side-entry, which keeps the front facade clean. The primary suite is properly isolated. The honest trade-offs are there (the grocery walk from garage to pantry is longer than it should be, and the vaulted great room is a thermal load that needs planning), but as a well-organized mid-market Southeastern farmhouse at 2,379 sq ft, this plan earns a genuine second look. Below is what we noticed working through the drawings as a reviewer, not as the seller.
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View Plan #52021HZ on Architectural DesignsContents
- Floor Plan Analysis
- Exterior: Materials, Proportions, and the Rear Porch Program
- What This Plan Gets Right
- Points to Consider Before You Buy
- Which Facade Variation Fits Your Site
- Who This Plan Is For, and Who It Isn't
- What It Costs to Build: Regional Estimates
- Frequently Asked Questions
- Sources & Further Reading
- The Short Verdict
Floor Plan Analysis
Main Level

The plan opens on a proper foyer (not a courtesy landing) and puts the dedicated 11-6 x 8-6 home office immediately to the left of the entry, behind its own double doors, with the same 10-foot ceiling as the main rooms. Its position off the foyer, away from the bedroom hall, is what sells the office as a real workspace rather than a former bedroom repurposed with a desk, and it's the single strongest argument for this plan if the household has a work-from-home routine. For a close-peer comparison at a tighter footprint, see our review of the 2,085 sq ft single-story modern farmhouse with split-bedroom layout: same diagram, 300 fewer square feet, and no dedicated office.
Past the foyer, the floor opens to a single integrated volume: a vaulted great room and dining space with the 10-foot-ceiling kitchen open along one side. The kitchen island is long enough for three counter stools plus workspace, and the walk-in pantry is a genuine room rather than a glorified cupboard. Split-bedroom diagram: the primary suite takes the right wing with its own vaulted-ceiling bedroom, freestanding tub, separate shower, dual vanities, and a walk-in closet that unfortunately does not pass directly to the laundry (a missed detail covered below). The two secondary bedrooms on the left wing each have a private bath (Bath 2 with a 30" x 66" shower, Bath 3 with a tub/shower), which works for children, teenagers and guests alike.
The mudroom with real lockers off the three-car garage is a strong detail; the laundry room sits adjacent. The rear porch runs the full width of the great-room zone, with a dedicated plumbing and gas stub for an outdoor kitchen against the side wall. The optional basement alternate adds a stair beside the garage entry for sloped-lot builds (the laundry shrinks to 6-6 x 11-0 and heated area drops to 2,330 sq ft), useful if the site is north of about Knoxville, genuinely unnecessary on a flat Lowcountry parcel.
Exterior: Materials, Proportions, and the Rear Porch Program

The rendered elevation does the work a good modern farmhouse needs to do without falling into costume. Board-and-batten siding runs across the whole envelope, gables included, and the single white color keeps that texture calm instead of busy. The metal-roof accents over the front porch and dormers break up what would otherwise be a monotonous shingle field. An asphalt-shingle substitution across the porch would flatten the entire facade and is the single most likely value-engineering cut to come back as regret. The porch columns need to sit on real masonry pier bases; post-to-slab detailing reads cheap and rots at the base in a wet Southeastern climate. This is worth specifying in writing, not assuming.








The rear porch is genuinely the second best living room in the house, and the plan's inclusion of a dedicated outdoor-kitchen zone against the side wall is rare at this price point. If you build this plan anywhere from Savannah up to Knoxville, plan to use that porch eight months a year. The outdoor kitchen stub is worth committing to during the rough-in even if you don't finish the appliances until year two, because gas and water lines after drywall are an expensive retrofit compared to a stub in open framing.



The side-entry three-car garage is the right call for facade cleanliness and the reason this elevation reads as a farmhouse rather than a suburban tract house. But it drives the real lot-width requirement: plan on 100 feet of buildable width minimum for a comfortable driveway turn, 120+ preferable. On a narrower lot, this plan becomes difficult to execute, since a front-load garage alternate isn't offered, unlike some of the other plans in Architectural Designs' catalogue.
What This Plan Gets Right
The dedicated home office is the reason to look at this plan. It has a real 10-foot ceiling, and both the ceiling spec and the door placement treat it as a primary room, so it reads that way on the plan instead of looking like a bedroom with a desk pushed into it. For households with a steady work-from-home pattern, that detail alone justifies the plan. The outdoor kitchen is handled with the same seriousness: gas and water stubs are drawn into the rear porch program. Most mid-market plans label the porch "outdoor kitchen" and leave the rough-in to the builder's interpretation, and this one does not.
The bedroom layout is a proper split with real separation. The primary suite sits on the right wing and the secondary bedrooms on the left, with the great room and kitchen acting as an acoustic buffer between them, so sound transmission is minimal in the configuration as drawn. The service spaces are generous too. The transition from the three-car garage passes through a dedicated mudroom with real lockers, not a hallway with a coat hook, which is a small detail that genuinely changes daily use. The walk-in pantry is a room rather than a cupboard, with the shelf depth and floor space to hold small appliances and bulk storage. A working kitchen needs that, and many plans in this footprint skip it.
From the street, the side-entry garage keeps the facade clean. The front elevation does not have to compete with three garage doors for attention, which is probably the single biggest reason this plan photographs well. At the back, the vaulted great room has a real connection to the outdoors: full-width sliders open to the rear porch, the glazing is generous and the vaulted ceiling carries the volume, so the space reads substantially larger than its measured footprint.
Points to Consider Before You Buy
The weakest daily-use detail is the grocery path from the garage to the pantry. You walk from the garage through the mudroom, past the laundry, along a short hall and then into the kitchen and pantry. It is not a dealbreaker, but it is worth asking the designer about during the plan-modification phase, since a change could shorten the path by two steps. The second gap is the missing pass-through from the primary closet to the laundry. That connection is the single best daily-workflow detail any plan can have, and the 1,988 sq ft plan 51772HZ includes it at 400 fewer square feet, which makes its absence here more notable. Factor $1,800–$4,500 into your modification budget if you want it wired in.
The secondary bedrooms are on the small side at 11-0 x 12-0 and 11-0 x 11-8, but each has its own full bath, so two school-age kids or a regular guest never share a bathroom.
Heating and cooling need attention early. A vaulted 28-0 x 18-0 great room holds a lot of air, and in a Southeastern summer that volume is a real cooling load: size the system from a load calculation rather than from square footage, expect it to land at 4 tons or more, and ask for a high return near the gable peak so warm air does not pool under the ridge in July and August. Those choices belong in the design phase, before framing fixes the duct runs. The open core also arrives without built-in zoning. Great room, dining and kitchen share one volume, so a family that cares how it divides should sketch furniture placement, or book a short designer consult, before move-in rather than after.
Lot width is a hard constraint. The side-entry garage locks out narrower lots, and no front-load alternate drawing is offered. Plan on a minimum buildable width of 100 feet; under 90 feet, the plan becomes difficult to execute without custom modification fees. Finally, expect the builder to try to value-engineer out the metal-roof accents. Substituting asphalt shingles on the porch and dormers saves $3,500–$6,000 and flattens the composition, so do not let them.
Which Facade Variation Fits Your Site
The facade directions shown through this review, from the black board-and-batten version with the red door to the wood-and-white and all-white farmhouse versions, are concept renderings drawn up by our editorial team on this plan's footprint. Architectural Designs does not sell them as options, so a builder should receive whichever one appeals as a design brief and price its siding, roofing and porch details separately.

Dark & Contemporary Farmhouse
Dark charcoal vertical siding with warm wood gable and porch accents against a dark metal roof. The version for a Franklin TN, Asheville, or semi-rural Nashville lot where a darker envelope reads correctly against a wooded setting. Flag for Southeast execution: dark siding in summer afternoon sun hits 150°F+ on the west-facing walls. Specify a cool-roof underlayment and proper ridge ventilation or plan on higher cooling loads. Works; costs more to operate than the default elevation.
Modern Minimalist with Desert Planting
White stucco or white fiber-cement siding, warm wood accent panels at the gables, dark roof, xeriscape planting. The version for a Phoenix, Austin, or Santa Fe lot where the minimalist envelope reads against a bright sun and the desert planting isn't pretending. A bad fit in the Lowcountry: white in Lowcountry humidity shows algae streaking aggressively and the agaves won't survive a hard winter freeze. Execute this direction on the right lot or not at all.
Coastal Shake & Metal
Light grey cedar shake siding with a light-colored standing-seam metal roof, a single-statement turquoise front door, and a naturalistic dune-grass landscape. The version for a Mount Pleasant, Kiawah, 30A, or Gulf Coast lot where the vocabulary reads honestly against salt air. The cedar shakes age beautifully in coastal environments; the light metal roof is the correct choice for hurricane zones; the dune grasses handle the sand and salt. Do not build this direction more than 10 miles inland, because the coastal vocabulary reads forced without the water.
Rustic Dark Board-and-Batten
Dark grey board-and-batten with natural wood window and porch accents against a wildflower meadow setting. Best fit: a rural Asheville, Franklin NC, or hill country TN parcel where the house sits on real acreage and the meadow landscape isn't a suburban compromise. This direction works best on country properties north of 2 acres. Flag: specify integral-color siding rather than painted, or plan on repainting in 6–8 years.
White Brick & Wood Accent
Painted white brick main body with warm cedar gable and porch infill, dark roof, agave-and-gravel landscape. The version for an established Charleston suburb, an older Nashville neighborhood, or an intown Atlanta lot where the formal landscape reads against the neighbors. A practical note: painted brick is a commitment: once painted, it cannot be safely unpainted without substantial damage to the brick face. If you aren't 100% sure on white, use limewash instead (fails gracefully to a natural limewash-weathered look rather than peeling paint).
All-White Modern Simplicity
Complete white envelope, light wood accent door and porch, dark roof, severely manicured lawn and boxwood. The Hamptons-adjacent version. Best fit: a Kiawah or Daniel Island lot where the formal landscape has the setting to carry it. A warning for Lowcountry execution: pure white stucco or siding shows algae within 12–18 months in coastal humidity. Budget annual soft-wash cleaning and this works; skip it and the house looks tired by year two.
Craftsman Stone & Green
Stone veneer base with deep green board-and-batten, wood gable and porch timbers, forest-edge planting of ferns and conifers. The version for an Asheville mountain lot, a lake Keowee parcel, or a high-country Blue Ridge build where the setting does half the work. The deep green is a specific commitment. It reads beautifully against surrounding forest but fights actively with a suburban lawn setting. Specify integral color on the siding; painting this depth of green onto fiber cement is a 6–8 year repaint cycle otherwise.
High-Contrast Black & Wood
Black vertical siding against light wood accents, a bright red front door, naturalistic meadow planting. The most graphic of the eight variations and the one that photographs best on Instagram. Works on a rural or edge-of-town lot where the black envelope has room to breathe; does not work in a suburban row where the contrast reads as defiant against neighboring homes. Surface-temperature flag: black siding in Southeast afternoon sun runs 150–170°F, so specify a ventilated rainscreen assembly behind the siding or plan on heat-related finish failure.Who This Plan Is For, and Who It Isn't
A strong fit for: households with a consistent work-from-home pattern where a real office (not a flex space) is non-negotiable; couples or small families who want a full outdoor-living program and will use the rear porch eight months a year; empty-nesters right-sizing from a two-story while keeping three bedrooms and generous entertaining volume; buyers on a lot of 100+ feet of buildable width in the Southeast or Southwest where the side-entry garage and rear porch both have the site to work with.
A weaker fit for: families with three or more children under sixteen (the plan is three-bedroom by design, with a private bath for each secondary room and no path to a fourth bedroom without substantial modification); buyers on lots under 90 feet of buildable width (no front-load garage alternate offered); households where a closet-to-laundry pass-through is a hard requirement (absent from the as-drawn plan); climate zones above roughly 6,500 heating degree days where the vaulted great-room volume becomes an operating-cost liability.
If you're in the last group and want a smaller-footprint plan in the same vocabulary, our review of the 1,988 sq ft modern farmhouse plan 51772HZ scales the split-bedroom diagram down to a more forgiving footprint and includes the closet-to-laundry pass-through this plan lacks. If you need more bedrooms or a second story, the versatile 4-bedroom country farmhouse with wrap-around porches is the step up.
What It Costs to Build: Regional Estimates
The ranges that follow are estimated turnkey costs for a single-story modern farmhouse of 2,300–2,500 sq ft built in the Southeast between 2024–2026, which brackets Plan 52021HZ at 2,379 sq ft. They start from the 2024 NAHB Cost of Constructing a Home baseline and are adjusted with regional multipliers. Land, sitework, septic and well sit outside them unless a line says otherwise.
Southeast Median, Plan 52021HZ $565,000 Range: $440,000–$720,000 turnkeyThe middle figure in each market assumes the build this review argues for: the metal porch roof kept, the outdoor kitchen finished and working on move-in day, and standard-grade finishes inside. Leaving the outdoor kitchen as a rough-in or keeping finishes basic moves a build toward the lower tier, and an upgraded finish schedule pushes it into the top one, with the submarket deciding where inside each band a given lot lands.
Greenville and the Upstate are the least expensive place on this list to build the plan: $420,000–$485,000 at the standard tier, $485,000–$580,000 mid-spec and $580,000–$690,000 with upgraded finishes, helped by framing labor that still prices below Charleston and crews whose bids tend to be predictable. Charlotte and the Triangle sit a step higher at $445,000–$510,000, $510,000–$610,000 and $610,000–$735,000; material costs there have held flat, and the gap comes from demand for skilled trades pushing bids up.
Metro Atlanta outside the Perimeter runs $435,000–$505,000 standard, $505,000–$605,000 mid-spec and $605,000–$740,000 upgraded, and bids there vary widely enough that three quotes are worth collecting instead of two. Nashville and Franklin cost more at every tier, $495,000–$570,000, $570,000–$680,000 and $680,000–$815,000, because lot preparation and the permit cycle are both expensive in that market.
The coast and the mountains top the list for different reasons. Charleston and Mount Pleasant come in at $515,000–$590,000, $590,000–$700,000 and $700,000–$835,000, with hurricane strapping and flood elevation written into the code. Asheville is higher again at $525,000–$605,000, $605,000–$720,000 and $720,000–$855,000, since a house this wide on a sloped mountain lot pays for extra excavation and foundation work.
Line Items Worth Budgeting Separately
The outdoor kitchen finish-out is the largest optional line. The rough-in for gas, water and drain is already in the plan, but the appliance package, counter, sink and cabinetry are a separate $12,000–$35,000 depending on what you choose. Build the rough-in during construction even if you do not finish the kitchen until year two, because running gas lines through a finished porch ceiling later is an expensive regret. The garage is the next decision. The third bay adds roughly $18,000–$28,000 in shell cost, so on a tight budget the two-car alternative is worth asking the designer about; expect a $2,500–$4,500 modification fee for it.
Two lines protect how the house looks and performs. Keep the standing-seam metal accents on the porch and dormers: substituting asphalt saves $3,500–$6,000 and flattens the composition, and it is the single value-engineering cut most likely to come back as regret. For the vaulted great room, plan on a 4-ton system at minimum with a high return at the gable peak, in place of a stock 3.5-ton configuration, and expect that to cost $3,500–$5,500 more than the builder-default system.
The walk-out basement only makes sense on a sloped lot. Built from the relocated-stair drawing it adds $75,000–$125,000 and roughly 1,800+ sq ft below the main floor; the alternate sheet counts that level as unheated area until it is finished, but even finished it comes in at about half the main level's cost per square foot. Near the water, budget another 7–12% across the board for hurricane strapping, impact-rated windows (required within 1 mile of the coast in SC/NC) and a raised foundation. None of that sits in a base builder quote, so ask for the coastal package by name. The closet-to-laundry pass-through discussed above belongs on this list too, at $1,800–$4,500 when the designer adds it before construction.
Read every figure in this section as a planning number from early 2026 that will move with lumber, labor and permit costs. The brackets describe 2024–2026 turnkey builds and leave out land, septic, well and long driveways. The real test comes before signing: three written bids from licensed local builders working from this plan set, compared line by line rather than on the bottom number.
Frequently Asked Questions
What lot size does Plan 52021HZ actually need?
The main-level footprint is roughly 82 feet wide at the widest point, but the side-entry three-car garage drives the real requirement. Plan on a minimum of 100 feet of buildable width for a comfortable driveway turn, 120+ preferable for a relaxed motor court. No front-load garage alternate is offered, so lots below 90 feet will require custom modification. Depth requirement is 90–120 feet to accommodate the house plus the generous rear porch and outdoor kitchen zone.
Is the home office really useful or is it just a bedroom in disguise?
In the as-drawn configuration, it's a real office. The 10-foot ceiling, the placement just off the foyer (not off a bedroom wing), and the proper door treatment all separate it from a repurposed bedroom. For households with a consistent work-from-home pattern, it holds up as a primary room. That said, if you want a fourth bedroom instead, the designer can convert it at the plan-modification stage for roughly $1,500–$3,500 with a closet addition.
Will the outdoor kitchen actually get used, or is it a resale feature?
In Charleston, Savannah, Nashville and similar Southeastern climates the rear porch is comfortable from April through October, about eight months a year, which gives an outdoor kitchen a long season. Whether it earns its cost depends on actually finishing it. If the appliances, counter and sink will follow within about 24 months, run the gas, water and drain lines during the main build while the framing is open; if there is no real plan to finish it, that rough-in money is better spent on the house itself.
Do the secondary bedrooms have their own baths?
Yes. Bedroom 2 has Bath 2 (11-2 x 5-4 with a 30" x 66" custom shower) and Bedroom 3 has Bath 3 (11-0 x 5-6 with a tub/shower), so no conversion is needed for teenagers or a regular guest.
Is 2,379 sq ft enough for a family of four?
Yes, comfortably, especially if the home office is kept as an office rather than converted to a fourth bedroom. The open-concept core gives the day-to-day space for a family; the split-bedroom diagram gives parents and children their acoustic separation. Because each secondary bedroom has its own bath, even two teenagers avoid a morning bathroom queue; the real constraint is the modest bedroom size, not the overall square footage.
Can this plan be built without the basement?
Yes. The primary drawing is slab-on-grade or crawlspace. The alternate drawing with the relocated basement stair is strictly for sloped-lot builds. On a flat Southeastern lot, skip the basement entirely; on a sloped lot anywhere above the fall line, the walk-out basement adds a large lower level, listed as unheated on the alternate drawing, that can be finished for roughly half the per-square-foot cost of the main level.
What does the plan set cost, and are modifications included?
Architectural Designs sells the plan set itself at a fixed price (check the listing; typically $1,800–$2,800 for construction-ready drawings). The alternate basement-stair drawing is included at no additional charge. Custom modifications (adding the closet-to-laundry pass-through, converting the office to a bedroom, mirroring the plan) are a separate service and are quoted per change. Budget $2,500–$8,000 for a modification package if you know you'll want changes before construction.
Sources & Further Reading
- Architectural Designs, Plan 52021HZ, Expansive Modern Farmhouse with Home Office and Outdoor Kitchen, 2,379 sq ft (primary listing and construction drawing set).
- International Residential Code (IRC), 2021 edition: Section R303 (minimum room dimensions), R310 (emergency egress from sleeping rooms), and R324 (hurricane strapping requirements in coastal zones), relevant to bedroom sizing, office conversions, and coastal submarket construction.
- ASHRAE Handbook, HVAC Applications, residential systems chapter, for vaulted-ceiling load calculations and return-air strategy in single-story volumes.
- U.S. Department of Energy, Building America Best Practices Series: regional guidance on high-volume conditioned spaces and rear-porch ventilation in humid-subtropical climates.
- NAHB, Cost of Constructing a Home, 2024 edition: baseline hard-cost figures by region, used for the turnkey ranges cited in the cost breakdown.
- Remodeling Magazine, 2024 Cost vs. Value Report: South Atlantic regional figures for exterior accent upgrades and outdoor kitchen ROI.
The Short Verdict
Plan 52021HZ is one of the more thoughtfully resolved 2,300–2,500 sq ft single-story farmhouse layouts on the Architectural Designs marketplace. The dedicated 10-foot-ceiling office is the detail that earns the plan its keep; the planned outdoor-kitchen rough-in is the detail that distinguishes it from peer plans at similar square footage; the split-bedroom execution and side-entry garage are both correctly resolved. The real trade-offs (the indirect grocery path, the missing closet-to-laundry pass-through, and the vaulted-volume HVAC load) are genuine and worth raising with your builder before you commit, not after.
Put plainly, this belongs on the short list of a work-from-home household, or a couple who will live on the rear porch eight months a year, building on a Southeastern lot with 100+ feet of buildable width. To see the same modern farmhouse language carried through a complete design concept, with board-and-batten, a vaulted interior and warm wood accents, read our piece on a builder-grade suburban transformed into a modern farmhouse masterpiece; it uses a different plan. For a closer comparison, our review of the single-story modern farmhouse with versatile bonus space shows which trade-offs a similar plan makes at a neighboring footprint.




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