Type CThe Kingfisher
From $170k
491 sq ft · 1 · 1 ba
Boise's pre-approved 491 sq ft one-bedroom — separate bedroom, full kitchen, full living room, ready to permit.
See the The Kingfisher
Boise · 83703 · 83714 · HOA / CC&R Country
ADU builder in Northwest Boise
Northwest Boise has no citywide overlay, but the binding constraint here is the HOA — many 1980s and 1990s subdivisions prohibit detached ADUs or require architectural review on top of city permitting. The CC&R check has to come before the build budget.
Northwest Boise · Boise, Idaho · zips 83703, 83714
What an ADU build looks like in Northwest Boise
Northwest Boise spans zips 83703 and 83714, between downtown and Eagle. The 83703 side covers Collister, Quail Ridge, Pierce Park, and the Hill Road corridor; 83714 covers eastern Garden City, the Eagle border, and Hidden Springs farther north. Lot sizes are generous, the housing stock is newer than the urban-core neighborhoods, and the real ADU friction point isn't city code — it's the HOA architectural review board.
Northwest Boise is a mix. Older Collister and Pierce Park pockets resemble the North End with larger 1900s–mid-century lots, while 1980s and 1990s subdivisions sit on 6,000–10,000 sq ft parcels with attached garages, manicured streets, and active HOAs. Hidden Springs (master-planned, 1,844 acres with 800+ acres preserved open space) uses smaller cottage lots inside a conservation-development framework with its own design guidelines on top of city code.
Overlays + Review
Which Boise overlays apply in Northwest Boise
Hillside overlayHOA / CC&R review
No citywide historic overlay applies in Northwest Boise. Two real constraints layer on top of standard residential zoning: (1) HOA / CC&R restrictions — many 1980s-and-later subdivisions have private architectural review boards that can prohibit detached ADUs outright, restrict short-term rentals, or require approval of exterior materials and roof pitch independent of city code; and (2) Hillside Development Overlay applies on the western edge where parcels climb into the foothills above Hill Road. Hidden Springs has its own published design guidelines and HOA dues around $110/month.
ADU considerations
What actually matters on a Northwest Boise ADU project
Pull the CC&Rs before anything else. Many Northwest Boise subdivisions explicitly prohibit detached ADUs, restrict short-term rentals, or require ARC approval that can run 4–6 weeks parallel to city permitting. The CC&R review is the single highest-value step in qualifying a Northwest Boise lead.
Where the HOA permits ADUs, expect architectural review on exterior materials, roof pitch, paint colors, and sometimes maximum square footage that's tighter than Boise's 900 sq ft city cap.
Lot geometry is generally not the binding constraint here — subdivisions typically sit on 6,000–10,000 sq ft parcels that comfortably accommodate any pre-approved plan, including the full 695 sq ft Kestrel.
Western Northwest Boise parcels above Hill Road can pick up Hillside Development Overlay where slope exceeds 15% — same geotech and review obligations as the Foothills neighborhood.
Hidden Springs operates as its own community within Northwest Boise — separate design guidelines, separate ARC, separate sentiment about backyard ADUs. Treat any Hidden Springs project as a custom feasibility check rather than a standard Boise build.
Plan fit
Best pre-approved plans for Northwest Boise lots
The City of Boise's pre-approved plan set works across the whole city — but each neighborhood has plans that fit cleaner than others. These are our picks for Northwest Boise.
Type C
Type DThe Kestrel
From $245k
695 sq ft · 2 bd · 1 ba
The largest pre-approved Boise plan — a 695 sq ft two-bedroom that lives like a small house.
See the The Kestrel
Type G-1The Sandpiper
From $145k
396 sq ft · Studio · 1 ba
A 396 sq ft studio paired with a single-car garage — pre-approved, dual-purpose, builds your storage and your rental in one footprint.
See the The Sandpiper
Type G-2The Osprey
From $140k
376 sq ft · Studio · 1 ba
Sister plan to the Sandpiper — 376 sq ft studio with garage, a different layout, same pre-approved status.
See the The OspreyNumbers
Home values + rent — what we can honestly say
Typical home value
$498K (83703) – $541K (83714); Hidden Springs median ~$905K
Zillow ZHVI, zips 83703 and 83714 · 2026
Rent — verify per address
Per-zip apartment listings in 83703 (Arbor Crossing) ran around $1,384 for 1BR / $1,525 for 2BR; 83714 (Boulder Creek) listings showed 1BR from ~$1,190 and 2BR from ~$1,315. Those are individual property listings, not true zip medians — the apartment inventory in Northwest Boise skews older garden-style product, not new urban high-rise, which is why headline numbers run lower than 83702. The honest planning band is the Boise-wide 1BR median of $1,479–$1,503; we verify per address before any pro-forma.
Lifestyle drivers
What makes Northwest Boise rentable
Collister + Quail Ridge mature-tree corridors
Pierce Park + the Greenbelt extension
Hidden Springs trails (25+ miles of community trail system)
Hill Road foothills access
Proximity to Eagle commercial center + downtown Boise
FAQ
Northwest Boise ADU questions, answered
Does my HOA allow a detached ADU?
It depends on the specific CC&Rs recorded against your lot. Boise zoning permits an ADU here under standard residential rules — but the HOA can independently prohibit detached ADUs, cap the size, require ARC approval, or restrict rental use even if the city has no objection. Pull the recorded CC&Rs at the Ada County Recorder before any design work; if the document is silent on ADUs, confirm in writing with the ARC. The CC&R review is the first step on every Northwest Boise lot check.
Are Hidden Springs ADUs allowed?
Hidden Springs has its own published design guidelines and HOA / ARC review on top of Boise city code. ADUs are not blanket-prohibited but face a higher bar — exterior compatibility with the master-planned community's design language, often a smaller maximum footprint, and review timelines that can run parallel to city permitting. Treat any Hidden Springs project as a custom feasibility check before bidding.
How long does HOA architectural review actually take?
On Northwest Boise subdivisions with active ARCs, plan on 4–6 weeks parallel to city permitting, plus revision cycles if the initial submittal doesn't fit the design standards. Where the HOA reviews submittals monthly, missing the cutoff date can add another full month before approval. The lot check confirms the specific HOA's review cadence so the project timeline reflects the actual constraint.
Will I trigger Hillside Development Overlay here?
Only on the western edge of Northwest Boise where parcels climb into the foothills above Hill Road and slope exceeds 15%. Most 83703 and 83714 subdivisions sit on flatter land below the foothill line and don't trigger HS-O. The lot check pulls the slope data from the Ada County GIS layer before any bid.
Does the 900 sq ft Boise ADU cap apply?
Yes — Boise's 2023 Modern Zoning Code cap of 900 sq ft or 50% of the primary dwelling, whichever is less, applies across Northwest Boise. The HOA may impose a tighter cap independent of city code; on lots inside an active ARC subdivision, the HOA limit is usually the binding constraint, not the 900 sq ft city ceiling.
Who actually builds the ADU?
Construction is performed by our licensed builder partner, Iron Crest Remodel (Idaho RCE-6681702), under the BoiseADU.com pre-approved-plan program. Same fixed-price contract, same Boise-based crews, same lot check before any bid.
Sources
Where the Northwest Boise facts come from
- Stevenson Real Estate — Boise zip code overview
- Boise Group — Northwest Boise area guide
- Build Idaho — Hidden Springs subdivision
- Zillow Home Value Index — zip 83703
- Zillow Home Value Index — zip 83714
Last reviewed 2026-05-24. Zoning rules referenced against City of Boise code; verify the specific overlay against the parcel record before any build commitment.
Northwest Boise · Boise, Idaho · Free Lot Check
Ready to build your Northwest Boise ADU?
Free 24-hour lot check — overlays, lot fit, plan recommendations, and a real number for your specific Northwest Boise address. Or call (208) 297-2036.