What home additions are most common in Severance, CO?

The Severance addition profile is different from older NoCo cities because most homes already have generous footprints. The top five we build: (1) Sunrooms and 3-season rooms ($25,000 to $80,000) — easiest fit on most Severance lots; (2) Covered patio and outdoor living additions ($15,000 to $50,000); (3) Bonus-room-above-garage finish-outs ($30,000 to $60,000) — Severance builders frame the space but leave it unfinished; (4) Detached ADUs under Colorado HB 24-1152 ($150,000 to $300,000+) — viable on Saddler Ridge, Highpointe Estates, Steeplechase, and rural-fringe lots; (5) 3rd-car-bay or RV garage additions ($25,000 to $80,000) for acreage Severance properties.

Can I build a detached ADU on my Severance property under HB 24-1152?

Colorado HB 24-1152, effective June 30, 2025, requires all qualifying jurisdictions including Severance to permit at least one accessory dwelling unit on single-family-zoned lots. Severance contracts building department services through SAFEbuilt and must adopt ADU-compliant zoning standards. Whether your specific lot supports a detached ADU depends on setback requirements, lot size, utility connection points, and HOA architectural review (which applies in Saddler Ridge, Highpointe Estates, Belmont Farms, and others). Severance's larger newer-subdivision lots — particularly Steeplechase, Saddler Ridge, Highpointe Estates, and rural-fringe acreage — are often well-suited to detached ADUs. Typical detached ADU cost: $150,000 to $300,000+ for 600 to 1,000 sq ft of finished, fully-served living space.

How much does a Severance home addition cost?

Cost depends heavily on type and complexity. Covered patio: $15,000 to $50,000. Sunroom / 3-season room: $25,000 to $80,000. Bonus-room-above-garage finish-out (electrical, drywall, flooring, paint, HVAC tie-in to existing): $30,000 to $60,000. Mudroom / drop-zone: $15,000 to $35,000. 3rd-car-bay garage addition: $25,000 to $50,000. RV garage addition (oversized, taller): $40,000 to $80,000. Master / primary suite addition: $80,000 to $150,000+. Attached or basement ADU: $50,000 to $120,000. Detached ADU: $150,000 to $300,000+. Every estimate is written, line-item, and binding — no surprise change orders.

How long does a Severance home addition take?

Bonus-room finish-out: 4 to 8 weeks construction. Mudroom addition: 6 to 10 weeks. Sunroom or covered patio: 6 to 12 weeks. 3rd-car-bay garage: 8 to 12 weeks. Master suite addition: 12 to 20 weeks. Attached ADU: 14 to 22 weeks. Detached ADU: 22 to 36 weeks. The SAFEbuilt permit review (3 to 5 weeks per round, typically 5 to 8 weeks for ADUs and structural additions) plus optional HOA architectural review (2 to 6 weeks) run before construction starts. Total project timeline including design and permit: typically 6 to 12 months for major additions.

Will an addition to my new-construction Severance home look like it was always there?

Architectural matching is one of the things we spend the most time on for Severance additions. New-construction homes have specific trim profiles, siding lap dimensions, window mullion patterns, soffit details, and roofing materials that have to match precisely or the addition looks bolted on. We match siding by manufacturer and color, source matching trim profiles, replicate window styles and grid patterns, blend rooflines (typically maintaining the existing roof pitch and shingle color), and continue interior finishes (flooring, baseboards, paint, ceiling height) seamlessly through the transition. The goal is that 5 years later, no one can tell which part of the house is the addition.

Do I need HOA approval for a Severance home addition?

Yes, in most Severance subdivisions with active HOAs — including Saddler Ridge, Highpointe Estates, and Belmont Farms — exterior additions require architectural review. The HOA reviews drawings, materials specifications, and exterior color choices to confirm the addition meets community design standards. Typical HOA review timelines: 2 to 6 weeks. We've submitted to most active Severance HOAs and handle the architectural review packet for you: drawings, materials list, color samples, and timeline. Interior-only work (like a bonus-room finish-out that doesn't change the exterior) generally doesn't require HOA review.

Can you finish out the unfinished bonus room above my Severance garage?

Yes — bonus-room-above-garage finish-outs are one of our most common Severance projects. Many Severance builders frame the bonus-room shell (subfloor, walls, roof) but leave the interior unfinished to keep base pricing down. We finish it out: insulation, drywall, flooring, paint, electrical (added outlets, lighting, dedicated circuits), HVAC tie-in to the existing system (or a mini-split if the ductwork can't reach), trim, doors, and any custom features (built-in bookcases, window seat, half-bath). Typical $30,000 to $60,000 depending on size, finish level, and whether HVAC requires significant rework. SAFEbuilt permit required: framing if any walls are added, electrical, mechanical, and drywall inspections.

Home Additions in Severance, CO | Sunrooms, ADUs, Bonus-Room Finish-Outs & Garages | GIMA Renovation

Severance Additions: A Different Calculation Than Older NoCo Cities

Severance home additions look different from what we build in Evans, Loveland, or Fort Collins. Most Severance homes were built in the last 15 years with generous interior footprints already — so we're rarely adding a master suite onto a cramped 1970s ranch the way we do in Evans. Instead, the typical Severance addition project is one of the following:

Finishing the unfinished space the builder framed but didn't complete — especially bonus rooms above garages.
Adding livable square footage outside the existing footprint — sunrooms, covered patios, mudrooms.
Building a detached ADU on the larger lots in Steeplechase, Saddler Ridge, Highpointe Estates, or rural-fringe Severance, taking advantage of Colorado HB 24-1152.
Adding garage capacity — 3rd car bays, RV garages, workshops — especially on acreage-edge Severance properties.
Adding a master/primary suite — less common because new builds have adequate masters, but happens for multigenerational families or aging-in-place reconfigurations.

We're a Greeley-based remodeling company about 25 to 30 minutes from Severance. We handle Severance additions from initial design through final SAFEbuilt inspection — including HOA architectural review for Saddler Ridge, Highpointe Estates, and other HOA-governed subdivisions.

Severance Home Addition Cost Ranges

Covered patio / outdoor living addition: $15,000 to $50,000. Concrete slab or composite deck base, post-and-beam structure, roof system tied into existing, electrical for fans and lighting, optional ceiling fans, optional outdoor kitchen rough-in.
Sunroom / 3-season room: $25,000 to $80,000. Walls, glazing, roof, flooring, HVAC option, electrical. Year-round usable Colorado sunroom adds ~$15,000 over basic 3-season construction.
Bonus-room-above-garage finish-out: $30,000 to $60,000. Insulation, drywall, flooring, electrical, HVAC tie-in or mini-split, trim, paint, optional half-bath rough-in.
Mudroom / drop-zone addition: $15,000 to $35,000. New foundation slab or pier extension, framing, drywall, flooring, built-in cabinetry, optional half-bath.
3rd-car-bay garage addition: $25,000 to $50,000. Slab, framing, garage door, electrical, roof matching existing.
RV garage addition: $40,000 to $80,000. Oversized footprint, taller bay (typically 12-14 ft door height), upgraded electrical, often with workshop space.
Master / primary suite addition: $80,000 to $150,000+. New foundation, framing, full MEP, bedroom + bathroom + walk-in closet, roof tie-in, exterior matching, flooring continuity.
Attached or basement ADU (in-law suite): $50,000 to $120,000. Adds full kitchen and bathroom plumbing, separate entry, code-compliant egress, full HVAC and electrical for independent living.
Detached ADU under HB 24-1152: $150,000 to $300,000+. Complete detached structure, foundation, full framing, MEP, finishes, separate utility tie-ins (water, sewer, gas, electrical), driveway and walkway access.

Every Severance addition estimate is written, line-item, and binding — you see exactly what each labor and materials line costs before signing.

The 9 Most-Requested Severance Addition Projects

1. Sunroom / 3-Season Room Addition

Severance lots and Colorado weather both favor the sunroom: 245+ sunny days per year, big skies, and lot sizes that can support a 12' x 16' through 16' x 24' sunroom attached off the back of the house. Two tiers:

3-season room ($25k-$45k): Single-pane or basic dual-pane glazing, no HVAC, used spring through fall.
Year-round sunroom ($45k-$80k): Insulated walls, low-E dual-pane glazing, HVAC tie-in (ductwork extension or mini-split), conditioned floor, finished interior. Used 12 months a year.

Severance HOAs typically approve sunrooms readily as long as siding, roofing, and trim match the main house.

2. Covered Patio & Outdoor Living Room

Less expensive than a sunroom and almost as Colorado-functional. A 12' x 16' or 14' x 20' covered patio adds shade, rain protection, year-round outdoor living, and a dedicated space for a grill, fire feature, or outdoor TV. Typical scope: concrete slab or composite deck base, 6x6 structural posts, beam-and-rafter or truss roof tied into the existing roofline, T&G ceiling, ceiling fans, electrical for lighting and outlets, optional outdoor kitchen rough-in. Pairs naturally with concrete patio work and landscape integration.

3. Bonus Room Above Garage Finish-Out

Many Severance builders frame the bonus-room shell above the garage (subfloor, walls, roof structure) but leave it unfinished to keep base pricing down. The unfinished room sits there for 5-10 years until owners realize it could be:

Home office (most common ask, especially post-2020).
Teen bedroom or guest suite.
Media room or game room.
Home gym.
Hobby studio or craft room.

Finish-out scope: insulation, drywall, flooring (LVP or carpet), electrical (added outlets, overhead lighting, dedicated circuits for office equipment or media), HVAC tie-in or mini-split, trim, doors, paint, optional half-bath rough-in. Typical $30,000 to $60,000. The dominant decision: HVAC. The original system often can't reach the new space adequately. A 12k-18k BTU ductless mini-split ($3,500-$6,500 installed) is often the better answer than extending ductwork.

4. Detached ADU Under Colorado HB 24-1152

Colorado HB 24-1152, effective June 30, 2025, requires qualifying jurisdictions to permit at least one ADU on single-family-zoned lots. Severance is a qualifying jurisdiction. The larger Severance subdivision lots — particularly Steeplechase, Saddler Ridge, Highpointe Estates, and rural-fringe acreage — are often well-suited to detached ADUs. We've built detached ADUs in the 600-1,000 sq ft range for:

Multigenerational families — aging parents or grown kids who need independence with proximity.
Long-term rentals — supplemental income with Severance's growing rental market.
Home offices — for owners wanting full separation between work and home, especially post-2020.
Future flexibility — building now while equity supports the investment, with optional rental income covering carrying cost.

Typical cost: $150,000 to $300,000+ depending on size, finish level, foundation type, and utility tie-in distance. Larger Severance lots help because longer utility runs (especially sewer connection) add cost. SAFEbuilt permit with full plan review (5-8 weeks typical), HOA architectural review for HOA-governed lots (4-6 weeks). Total project timeline including design and permit: 8 to 12 months.

5. Attached ADU / In-Law Suite Addition

Less expensive than detached, often easier to permit. We add an attached suite onto the existing footprint — bedroom, bathroom, kitchenette, living area, separate entry. Typical $50,000 to $120,000 depending on size and scope. Best suited to lots where setback or HOA constraints make a detached ADU difficult, or where the multigenerational family wants close-but-separate rather than fully-detached.

6. 3rd Car Bay / RV Garage Addition

A common Severance ask, especially on rural-fringe acreage properties with horse trailers, boats, classic cars, ATVs, or RVs. We add:

3rd car bay ($25k-$50k) — standard 8-foot or 9-foot door height, matching siding, matching roof.
RV garage ($40k-$80k) — 12-14 ft door height for RV/boat clearance, deeper footprint (28-40 ft), upgraded slab thickness, often paired with shop space.
Detached workshop / hobby garage ($30k-$80k) — standalone structure with heating, electrical, lighting, and optional half-bath.

7. Mudroom / Drop-Zone Addition

For homes where the garage-to-house entry dumps directly into the kitchen or hall with no transition zone. A mudroom addition adds a buffer: built-in cubbies, hooks, bench seating, dedicated boot tile floor, washer/dryer relocation (sometimes), and optional half-bath. Typical $15,000 to $35,000. Often extends off the existing garage entry on a small new foundation pad.

8. Master / Primary Suite Addition

Less common in Severance than older NoCo cities because new builds already have adequate masters, but happens when:

An aging parent moves in and the existing master moves to that family member.
A growing family converts the existing master to a kid bedroom and adds a new larger master.
Aging-in-place owners want a main-floor master in a 2-story home.
Premium-tier owners want a true primary suite (separate sitting room, larger walk-in closet, spa bathroom) beyond what the builder delivered.

Typical $80,000 to $150,000+ for a 400-600 sq ft suite addition with bedroom, full bathroom, walk-in closet, and proper exterior matching.

9. Detached Office / Studio Outbuilding

For owners who want a dedicated work-from-home structure without the full kitchen-and-plumbing scope of an ADU. Typical 200-400 sq ft detached structure with electrical, HVAC (mini-split), insulated walls, finished interior, but no plumbing. $30,000 to $80,000. Faster than an ADU because no plumbing tie-in, no full ADU plan review.

Severance HOA architectural review reality check: most Severance subdivisions with active HOAs — including Saddler Ridge, Highpointe Estates, and Belmont Farms — require architectural review for any exterior addition. We submit the packet (drawings, materials specs, color samples) and coordinate the 2-6 week review timeline. If you're in an HOA-governed subdivision, plan on an additional 4-6 weeks of pre-construction timeline beyond the SAFEbuilt permit.

Architectural Matching: Making the Addition Look Like It Was Always There

The single biggest difference between a great Severance addition and a mediocre one is architectural matching. New-construction Severance homes have specific details that have to be replicated precisely or the addition reads as “the bolted-on part of the house.”

Siding match. We identify your siding manufacturer (typically LP SmartSide, James Hardie, or vinyl from a specific brand), order the same product in the same color, and feather the new siding into the existing run so the seam disappears. Sometimes that means replacing more existing siding than people expect, but it's the only way the join is invisible.
Roof match. Same shingle manufacturer, same color, same pitch, and ideally tied into the existing roof rather than abutting it. New shingles weather differently than 8-year-old shingles, so we typically blend the join with feathering rather than a hard line.
Window match. Same window brand, same grid pattern (Colonial, Prairie, no-grid, etc.), same trim profile, same exterior color, same interior finish. Mismatched window grids on an addition are an immediate giveaway.
Trim profile match. Soffit return details, fascia depth, frieze board, corner trim profiles — all matched.
Interior continuity. Flooring continuous through transitions (no carpet-to-LVP T-strip if we can help it), baseboard and door casing profiles matched, paint sheen and color matched, ceiling height continuous, light fixture style continuous.

The goal: 5 years after the addition is complete, no one looking at the house or walking through it should be able to tell which part is the addition.

Severance Subdivisions & Addition Considerations

Hidden Valley. Mid-2000s through 2010s subdivision. Lots 6,000-9,000 sq ft. Tight for detached additions; bonus-room finish-outs, sunrooms, and covered patios fit well. HOA architectural review applies.
Tailholt. Newer subdivision. Lots vary; some support sunrooms and small additions, others are tighter. HOA architectural review applies.
Belmont Farms. 2018-2024 build years. Active HOA with architectural review. Common projects: sunrooms, covered patios, bonus-room finish-outs.
Steeplechase. Larger lots (9,000-15,000+ sq ft). Excellent for sunrooms, master suite additions, and some detached ADUs. HOA architectural review applies.
Saddler Ridge. Premium subdivision with the largest lots in many sections. Excellent fit for detached ADUs, RV garages, sunrooms, and master suite additions. HOA architectural review is more rigorous — plan on the longer end of the 2-6 week review window.
Highpointe Estates. Higher-end subdivision with generous lots. Same as Saddler Ridge — strong fit for premium additions, but more rigorous HOA review.
Mountain View Estates & other 2020s subdivisions. Newer, varying HOA standards. Common projects: sunrooms, covered patios, bonus-room finish-outs.
Rural-fringe Severance acreage (1/3 acre to 1+ acre). Best opportunity for detached ADUs, RV garages, workshops, and detached offices. Some properties are in unincorporated Weld County rather than Severance proper — jurisdiction varies. We confirm the permitting authority before quoting.
Severance original-town homes. Pre-2000 housing stock. Layouts and lot patterns vary widely — we approach these projects more like our Greeley or Evans additions.

The Severance Permit Process for Additions

Severance contracts building department services through SAFEbuilt. Additions always require a building permit with full plan review.

Plan submittal package. Stamped engineering drawings (architect or licensed engineer), site plan showing setbacks, energy compliance certification, structural calculations, MEP plans.
Plan review timeline. 3 to 5 weeks per round for standard additions, 5 to 8 weeks for ADUs (additional review for utility connections, separate egress, kitchen and bath plumbing).
Fees. Based on project valuation. Plan review + permit fee + impact fees (utility tap fees apply for new ADU water/sewer connections).
Card payment 3% fee. e-check is free. For permit packages over $5,000-$10,000 the difference is meaningful.
Inspections. Footing, foundation, framing, electrical rough, plumbing rough, mechanical rough, insulation, drywall, and final — all coordinated through SAFEbuilt with proper notice.

For rural-fringe Severance acreage in unincorporated Weld County, permitting goes through the Weld County Building Department rather than Severance/SAFEbuilt. We confirm jurisdiction before quoting.

Our Severance Addition Process, Start to Finish

Free on-site walkthrough. We assess your lot, existing structure, and what's feasible. We talk through priorities, budget, and timeline.
Design phase (3-8 weeks). Schematic drawings, structural design with our engineering partner, exterior matching specification, interior finish selections, 3D rendering for major additions. We coordinate with the architect or engineer as required by SAFEbuilt.
Written, line-item estimate. Detailed scope and cost. Every materials line and labor line itemized.
Contract & deposit. Permit drawings finalized, deposit collected, project scheduled.
HOA architectural review submittal (if applicable, 2-6 weeks).
SAFEbuilt permit submittal (3-5 weeks standard, 5-8 weeks ADU).
Site preparation & foundation. Excavation, footings, foundation, slab. 1-3 weeks.
Framing & dry-in. Walls, roof, sheathing, windows, exterior doors, roofing, siding wrap. 2-6 weeks depending on size.
Rough MEP. Plumbing, electrical, HVAC, gas. 1-3 weeks.
Insulation & drywall. 1-2 weeks.
Interior finishes. Flooring, trim, paint, cabinets, counters, fixtures, lighting. 3-8 weeks.
Exterior finishes. Siding, soffit, fascia, gutters, paint. 1-3 weeks (sequenced through dry-in and finish phases).
Final inspection & walkthrough. SAFEbuilt final, punch list, walkthrough with you.

Why Severance Homeowners Choose GIMA Renovation

Bonus-room-above-garage finish-out specialty. One of our most-requested Severance projects.
HB 24-1152 ADU experience. Both attached and detached ADUs, with full SAFEbuilt and HOA navigation.
Architectural matching obsession. Siding, roofing, trim profiles, window grids, paint sheen — matched so the addition doesn't look like an addition.
HOA experience. Submitted to Saddler Ridge, Highpointe Estates, Belmont Farms, and other Severance HOAs. We handle the architectural review packet for you.
SAFEbuilt-familiar. Same permit ecosystem as Windsor, navigated weekly.
Weld County permit experience for rural-fringe Severance acreage in unincorporated areas.
One contractor for everything — design, engineering coordination, permits, foundation, framing, MEP, drywall, interior finish, exterior matching. No subs to chase.
Written, line-item scopes. Every materials and labor line on paper before we start.
Licensed, bonded & insured. Full liability and workers' comp.

Frequently Asked Questions

What additions are most common in Severance?

Sunrooms, covered patios, bonus-room-over-garage finish-outs, and (on larger lots and rural-fringe acreage) detached ADUs and RV garage additions.

Can I build a detached ADU under HB 24-1152 in Severance?

Yes — HB 24-1152 (effective June 30, 2025) requires Severance to permit at least one ADU on single-family-zoned lots. Specific feasibility depends on setbacks, utility access, and HOA review. Larger Severance lots (Steeplechase, Saddler Ridge, Highpointe Estates, rural-fringe acreage) are the best fit.

How much does a Severance addition cost?

Covered patio $15k-$50k; sunroom $25k-$80k; bonus-room finish-out $30k-$60k; mudroom $15k-$35k; 3rd car bay $25k-$50k; RV garage $40k-$80k; master suite $80k-$150k+; attached/basement ADU $50k-$120k; detached ADU $150k-$300k+.

How long does an addition take in Severance?

Smaller additions: 6-12 weeks construction. Master suite: 12-20 weeks. Attached ADU: 14-22 weeks. Detached ADU: 22-36 weeks. Plus 3-8 weeks SAFEbuilt permit review and optional 2-6 weeks HOA review pre-construction.

Will my addition match my existing Severance home?

Yes — architectural matching is one of the things we spend the most time on. Siding by manufacturer, roofing match, window grid pattern, trim profile, and interior continuity all matched so the addition doesn't look bolted on.

Do I need HOA approval?

For exterior additions in most Severance subdivisions (Saddler Ridge, Highpointe Estates, Belmont Farms, etc.): yes. We submit the architectural review packet. Interior-only work (bonus-room finish-out) typically doesn't require HOA review.

Can you finish out my unfinished bonus room above the garage?

Yes — one of our most common Severance projects. $30k-$60k typical, 4-8 weeks construction.

Do you charge a travel fee for Severance?

No. Severance is part of our standard NoCo service area.

Ready to Start Your Severance Addition?

Call (970) 836-4334 to schedule a free on-site walkthrough, or send a message through our contact page with your Severance address and a description of what you're thinking. We'll measure, evaluate your lot, talk through what's feasible, and send a written, line-item estimate within a few business days — no pressure, no obligation.