A-Frame · A taller, longer version of the 450 plan
A-House 520
A-House 520 measures 656 sq ft in total with 520 sq ft of living area on a 20 ft × 25 ft footprint. Floor-to-ceiling heights are 8 ft 6 in on the first floor and roughly 8 ft 2 in in the loft, giving the interior noticeably more volume than the 450. The plan holds one bedroom, one bathroom, and an optional 220 sq ft terrace.
Fit
Who the A-House 520 may suit
This plan suits someone who likes the 450 but wants more volume: 656 sq ft total with 520 sq ft of living area, 8 ft 6 in on the first floor, and roughly 8 ft 2 in in the loft. The footprint grows only in length, from 23 ft 6 in to 25 ft, so the extra area arrives without widening the building on the site. It remains a one-bedroom, one-bathroom plan, with an optional 220 sq ft terrace.
This is a reading of the drawn plan, not a recommendation for your parcel. Use and occupancy are decided by your jurisdiction.
Specifications
At a glance
Every model page lists the same fields. Values come from the available drawings and verified source data; fields the drawings do not establish are labeled rather than estimated.
| Field | Value |
|---|---|
| Total area | 656 sq ft |
| Living or usable area | 520 sq ft |
| Footprint | 20 ft × 25 ft |
| First-floor height | 8 ft 6 in |
| Upper-level height | approx. 8 ft 2 in |
| Bedrooms | 1 |
| Sleeping areas | Not verified — confirm during project review |
| Bathrooms | 1 |
| Deck, porch, or terrace | 220 sq ft (optional) |
| Interior room labels | Not verified — confirm during project review |
Layout and use
How the plan works
- The extra 2 ft of length over the 450 goes into the living area rather than the service core.
- The difference between total and living area accounts for circulation and the sloped perimeter under the roof.
- The loft runs over the enclosed rooms at the back of the plan.
- Nothing on this page promises zoning approval, occupancy status, or legal use. That depends on your parcel and jurisdiction.
Gallery
A-House 520 views
Architectural renderings of the model. Select an image to enlarge it.
Architectural rendering Architectural rendering
Floor plan
A-House 520 plan drawing
Select the drawing to enlarge it.
Floor plan
Drawings and renderings
What the available drawings show — and do not establish
This page carries 2 architectural renderings of the A-House 520. Renderings show form, proportion, and the intended relationship between the plan and its openings. They are not photographs of a completed project, and they do not describe materials, finishes, or equipment.
One plan drawing is published above. A plan establishes the arrangement of spaces and the dimensions recorded in the specifications table. It does not establish structural design, snow or wind loads, energy compliance, or foundation type for any particular site.
No drawing on this page has been reviewed for your parcel, and no drawing is by itself engineering or a permit. A-Hut can manage the permitting work for your project — coordinating the licensed local professionals, preparing the permit package, and handling the submittal and plan-review responses when that scope is in the written agreement — while the permit itself is issued by the authority having jurisdiction.
Property planning
Planning the A-House 520 for a Colorado property
These are the questions we work through before scope, schedule, or cost. None of them has a default answer, and none of them is settled by the model you choose.
Intended and legal use
How will the structure be used through the year, and does the jurisdiction allow that use on this parcel?
Access and staging
Can the road, grade, turns, and seasonal conditions carry delivery, and is there room to stage work near the building area?
Foundation and soils
What do the soils, drainage, frost depth, and grade require, and has anyone assessed them for this location?
Utilities
Is power, water, and wastewater on the parcel, and if not, what is the distance and route to each?
Jurisdiction and permits
Which county or municipality reviews the project, and what do its zoning, setback, coverage, and permit steps require?
Site-specific climate loads
What ground snow load, wind exposure, and elevation apply at this location, and who will confirm them?
We do not publish an inclusions list for this model yet. Rather than invent one, we define scope in writing after the property review.
Questions
A-House 520 FAQ
Why are total and living area different?
How is the 520 different from the 450?
Does the higher ceiling change the footprint on site?
Which figure appears in the specifications table?
Nearest comparison
A-House 520 compared with A-House 450
Only fields that differ are listed, and only where at least one side is a verified figure.
| Field | A-House 520 | A-House 450 |
|---|---|---|
| Total area | 656 sq ft | 450 sq ft |
| Living or usable area | 520 sq ft | Not verified — confirm during project review |
| Footprint | 20 ft × 25 ft | 20 ft × 23 ft 6 in |
| First-floor height | 8 ft 6 in | 8 ft |
| Upper-level height | approx. 8 ft 2 in | 8 ft |
| Deck, porch, or terrace | 220 sq ft (optional) | 200 sq ft (optional) |
Related models
Smaller, similar, larger
Garden Office
Garden Office Large
580 sq ft total · 490 sq ft usable · 215 sq ft deck
View the model
A-Frame
A-House 800
800 sq ft · 1 bedroom · optional 200 sq ft terrace
View the model
A-Frame
A-House 1000
1,076 sq ft total · 2 bedrooms · optional 290 sq ft terrace
View the model
Further reading
Guides that apply to the A-House 520
Compact cabin models: A-House vs Barn
A-House 450, A-House 520, Barn Mini, and Barn Compact side by side: area, footprint, sleeping, bathrooms, and outdoor space.
A-Frame vs Barn: planning differences that matter
Usable area, wall space, loft volume, and footprint differences between the two structural forms, and which models suit each.
Discuss the A-House 520
Tell us about the property
Access, utilities, and intended use tell us more than a square-footage target.
Is the A-House 520 right for your site?
Send the location and access details and we will review feasibility before anything is committed.