Updated: Jul 03, 2026
Location and Projects
Address
418 Mainsail Rd, Oceanside, CA, 92054
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Jnilsondesigns Construction
Jnilsondesigns, 418 Mainsail Rd, Oceanside, CA (Owned by: Leonard William Winter Ii) holds a General Building license and 6 other licenses according to the California license board.
Their BuildZoom score of 106 ranks in the top 7% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Jnilsondesigns, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Jnilsondesigns Services
Start a project today:
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Medium Multi-Family Remodel...
Other Residential Remodel
Office Renovation
Restaurant Renovation
Retail Renovation
Other Commercial Renovation
Framing
Garage Construction
Restaurant New Construction
Retail New Construction
Office Building New Constru...
Industrial New Construction
Hotel New Construction
Warehouse New Construction
Other Commercial New Constr...
Industrial Renovation
Hotel Renovation
Warehouse Renovation
ADU
Small Multi-Family Remodel ...
Whole Home Remodel
Addition
Jnilsondesigns Contact Information
Phone Number: (775) 843-1301
Address: 418 Mainsail Rd, Oceanside, CA 92054
Jnilsondesigns Oceanside
Quality
106
93rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Jnilsondesigns has a BuildZoom score of 106, which places them above 93% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2023 |
Our building permit records indicate that Jnilsondesigns has worked on at least
2.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
1 project
|
$250k-$500k |
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Sewer lateral public right-of-way (prow) permit
2023-11-17
Adding a new 4 pvc private sewer lateral. contractor to maintain traffic control per w.a.t.c.h. standards. trench repair per city of encinitas trench backfill and resurfacing standard. prior to starting any work arrange for pre construction meeting by calling (760) 633-2781 at least 72 hours in advance
Valuation:
N/A
Permit #:
PROW-023844-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family residence addition and remodel
Valuation:
$425,000
Permit #:
BLDR-023612-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family residence addition and remodel
Valuation:
$425,000
Permit #:
BLDR-023612-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Construction of a new 6547 square foot single family dwelling with attached 861 square foot attached 3 car garage 624 square foot guesthouse 1560 square feet of stone paving gas fire pit and outdoor fireplace with small fountain and seat walls. 3670 square feet of autocourt 1500 square feet of catways 245 square feet of retaining walls.cross street: carmel valley road revisions to bp0... see more
Valuation:
$1,222,298
Permit #:
BP073096
Status:
final
Fee:
$27,423
Permit Type:
N/A
Building Type:
N/A
Torrey pines-combo permit for 1st for extension of family room kitchen remodel & 2nd floor master bedroom & bathroom & replacing the deck at existing 2 story sfu. rs-1-6 cstl hgt city cstl, parking impact, steep hillside census 83.24 geo. 52
Valuation:
$34,748
Permit #:
356318
Status:
complete
Fee:
$555
Permit Type:
Add/alt 1 or 2 fa...
Building Type:
N/A
Remove non-structural soffits remove and replace dry wall on north and south wall remove drywall ceiling and install t-bar ceiling --- no elect plumbing or mechanical at spec space b-6 new permit required for additional tenant improvement work electrical for 14 lights added 10/6/04
Valuation:
N/A
Permit #:
BI358289
Status:
final
Fee:
$663
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2001-08-01
Cross street: quest haven description of work: 376 sq. ft. addition to single family dwelling on 1st floor...497 sq. ft. conversion of storrage space above garage into habitable space (game room). 240 linniar foot interior partitions. 235 sq. ft. covered porch. adding staircase to access game room from outside
Valuation:
$67,746
Permit #:
PDS2001-1001-20011272
Status:
triage
Fee:
$717
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2002-02-22
Cross street: quest haven description of work: 376 sq. ft. addition to single family dwelling on 1st floor...497 sq. ft. conversion of storrage space above garage into habitable space (game room). 240 linniar foot interior partitions. 235 sq. ft. covered porch. adding staircase to access game room from outside
Valuation:
$67,746
Permit #:
PDS2002-1004-20020116
Status:
complete
Fee:
$741
Permit Type:
N/A
Building Type:
N/A
New primary residential structure single family dwelling or mh - plan check-permit
2005-03-18
Cross street: elfin forest rd. description of work:1198 sq ft single family dwelling 168 sq ft covered patio (hra) 3268 sq ft barn (sfd is above barn) 1840 sq ft detached finished garage 200 amps electrical service temp power. notice to permittee: temp power shall be inspected prior to framing inspection 3/24/06: one time only plan check extension for six months at 25% of plan check f... see more
Valuation:
$196,874
Permit #:
PDS2005-1001-20050526
Status:
complete
Fee:
$2,370
Permit Type:
N/A
Building Type:
N/A
New primary residential structure single family dwelling or mh - plan check-permit
2006-07-07
Cross street: elfin forest rd. description of work:1198 sq ft single family dwelling 168 sq ft covered patio (hra) 3268 sq ft barn (sfd is above barn) 1840 sq ft detached finished garage 200 amps electrical service temp power. notice to permittee: temp power shall be inspected prior to framing inspection 3/24/06: one time only plan check extension for six months at 25% of plan check f... see more
Valuation:
$196,874
Permit #:
PDS2006-1003-20060365
Status:
complete
Fee:
$4,900
Permit Type:
N/A
Building Type:
N/A
Master bed and bathroom addition expand living room remodel kitchen remodel bathroom replace windows
Valuation:
N/A
Permit #:
BIAD13-006222
Status:
final
Fee:
$8,504
Permit Type:
N/A
Building Type:
N/A
Proposed garage conversion into bedroom- 407 sq. ft. & new 2-car garage- 502 sq. ft. to an existing sfr plan change: garage footing added stem wall footing 4 to 6 inches wide.. *plan change,correct curb to pl is shown, length of new driveway was changed fr 22' to 18'6", complies per 142.0520 &142.0525(c)(4), rngarcia,9/17/04
Valuation:
$52,653
Permit #:
31758
Status:
Cancelled - Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
Add/Alt 1 or 2 Fa...
Residential alteration or addition - plan check-permit
2000-11-08
Cross street: sun valley activity code: 42rp14 42r114 description of work: convert portion of existing garage to shop only. non-habitable non-conditioned space by removing garage door and installin/changing windows tb: 1168 a 7
Valuation:
N/A
Permit #:
PDS2000-1004-20000658
Status:
complete
Fee:
$198
Permit Type:
N/A
Building Type:
N/A
640sf master suit w/deck & bedroom conversion to office
Valuation:
$100,270
Permit #:
B20-01575
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
N/A
Space #17; 125a 3ph subpanel & 60-day lock inspect; space split-off from bedrosidian tile; addendum 2/14/08; office tenant improvement. & h/c parking & restroom upgrades for combining spaces #17 & 16
Valuation:
$1,900
Permit #:
BP08000194
Status:
final
Fee:
$173
Permit Type:
N/A
Building Type:
N/A
New residential detached accessory structure - plan check-permit
2001-05-10
Log in cross street: questhavendescription of work:1951 sf residential barn/misc. elec./no plg. or mech.note: 7-3-01 this plan check is to replace expired plan check 1001-99001262...cag
Valuation:
$0
Permit #:
PDS2001-1001-20010787
Status:
PC Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New residential detached accessory structure - plan check-permit
2001-07-05
Cross street: questhaven description of work:1951 sf residential barn/misc. elec./no plg. or mechanical. note: 7-3-01 this plan check is to replace expired plan check 1001-99001262...cag
Valuation:
$28,777
Permit #:
PDS2001-1006-20010337
Status:
complete
Fee:
$963
Permit Type:
N/A
Building Type:
N/A
Addition of 75 sq feet to existing kitchen floor space and kitchen remodel
Valuation:
N/A
Permit #:
BIAD12-001536
Status:
final
Fee:
$1,981
Permit Type:
N/A
Building Type:
N/A
Commercial project remodel unit 13 (1067 square feet) remodel and addition new livingspace( total 102 square feet).cross st highway 1
Valuation:
$24,499
Permit #:
BP060790
Status:
Expired Permit
Fee:
$2,924
Permit Type:
N/A
Building Type:
N/A
Revision to bp060846 change from remodel to a demolition and rebuild of 387 square feet. cross st: hwy 1
Valuation:
$59,257
Permit #:
BP071037
Status:
Expired
Fee:
$2,102
Permit Type:
N/A
Building Type:
N/A
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Verified License
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Jnilsondesigns License info
Verified License
| License # | 921181 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Partnership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Jnilsondesigns at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 761983 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Partnership |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Jnilsondesigns at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 875611 |
| Status | Active |
| City | Milpitas |
| Type | General Contractor |
| Business Type | Partnership |
- When BuildZoom last verified this license, it had an expiration date of March, 2019. Check the current license status of Jnilsondesigns with the The City of Milpitas, CA
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 753780 |
| Status | Inactive |
| City | Oceanside |
| Type | Contractor |
| Business Type | Partnership |
- According to the City of Oceanside, CA, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Jnilsondesigns at the City of Oceanside, CA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-107322-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Partnership |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Jnilsondesigns at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 750967 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Partnership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Jnilsondesigns at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 558913 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Partnership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Jnilsondesigns at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
106
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Zenith Insurance Company |
59
Permits
- Building permit records show that Jnilsondesigns has worked on 59 permitted projects.
Jnilsondesigns Employees
JN
Jeffrey Michael Nilson
Qualify Partner
JW
Joseph Thomas Winter
General Partner
LI
Leonard William Winter Ii
Owner
MB
Martin Dale Brady
Sole Owner
RW
Robert Allan Winter
Sole Owner
WC
Winter Construction
Owner